JPH08200718A - Hot water-storage type hot water-supply device and system - Google Patents

Abstract

PURPOSE: To provide a hot water-storage type hot water-supply device which can perform a stable water supply with less variation in the temperature and quantity of hot water, and at the same time, by which a heat loss in a hot water supply pipe is less, and a hot water supply can be performed with a favorable heat efficiency without requiring a complicated constitution. CONSTITUTION: A hot water-storage type hot water-supply device feeds hot water to hot water-discharging faucets which are provided at respective locations of a building, through hot water-supply pipes being arranged in the building. Such a hot water-storage type hot water-supply device is equipped with a hot water-storage tank 1 with water-supply ports 3a-3d and hot water- discharging ports 2a-2d, in which heaters 4a-4d are built in, mixing device 10 which is connected to the hot water-discharging port 2d of the hot water-storage tank 1 and mixes hot water which is fed from the hot water-discharging port 2d and water which is fed from a by-pass pipe 9b to a specified hot water temperature, and mixed hot water-discharging port 104 which is connected to a hot water-supply pipe 15 and discharges the mixed hot water being mixed by the mixing device 10.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention provides hot water supply pipes in a building, and supplies hot water stored in a tank heated by a heater to hot water taps installed in various places in the building through the hot water supply pipes. The present invention relates to a hot water storage type hot water supply device and a hot water supply system incorporating the device.

[0002]

2. Description of the Related Art Generally, as a hot water supply system for a detached house or an apartment house, a late night electric power heater is used as a heating device, or a hot pump device is used to store hot water in a hot water storage tank.
There is one that supplies water to a hot-water tap that is appropriately installed in the building through a hot-water supply pipe provided in the building. In such a system, the hot water storage tank is composed of multiple hot water storage tanks in order to save space, and the temperature of the hot water is prevented from lowering due to heat dissipation in the hot water supply pipe, and the hot water is warmed when the hot water tap is opened. Conventionally, many proposals have been made to improve hot water properties by circulating hot water so that hot water can be provided immediately.

[0003] Conventionally, for example, Japanese Patent Application Laid-Open No. 4-45324 (hereinafter, referred to as "conventional example 1") is known as one that can immediately provide stable hot water when tapping water from a tap.
There is. In this conventional example 1, in order to improve the quick hot water property, a main pipe extending from the hot water tank and one side is connected to a branch portion provided in the main pipe, and the other side is attached to a tap and a branch pipe is provided inside. Disclosed is a hot water supply pipe including a hot water supply pipe and a return pipe for returning hot water from a main pipe to a hot water storage tank. The hot water supply pipe and the return pipe are connected by a branch pipe at an end on the side of the faucet to circulate hot water by a pump. Has been done.

In Japanese Patent Publication No. 3-56372 (hereinafter referred to as "conventional example 2"), a terminal water heater is provided near the faucet to reheat hot water heated by a hot water source. , Which is intended to be instantly heated by mixing with a water supplied from a water supply pipe by a preparation valve.

As a hot water storage tank equipped with a plurality of hot water storage tanks, a water supply port is formed at the lower end as disclosed in, for example, Japanese Patent Application Laid-Open No. 1-163555 (hereinafter referred to as "conventional example 3"). In addition, a hot water outlet is formed at the upper end and a plurality of hot water storage tanks equipped with an electric heater at the lower side are connected to each other by a water supply connection pipe and a hot water supply connection pipe at the water supply port side and the hot water supply port side, respectively. There is a system in which hot water stored in a tank is heated by an electric heater to boil up to a set temperature to supply hot water. In such an apparatus, as a heating means for heating the hot water stored in each hot water storage tank, a heat pump system is used instead of the electric heater.

Further, for example, Japanese Patent Application Laid-Open No. 1-163553 (hereinafter referred to as "conventional example 4") is provided with a plurality of tanks including a hot water storage tank and an auxiliary tank, and hot water boiled in the auxiliary tank is stored in the hot water. It is disclosed that water is supplied from the hot water storage tank to the auxiliary tank at the same time as the water is supplied to the tank.

Further, JP-A-4-24469 (hereinafter referred to as "conventional example 5") and JP-A-6-109327.
In the gazette (hereinafter, referred to as "conventional example 6"), a plurality of hot water storage tanks each having a built-in heater are connected in series with a hot water supply port and a water supply port by connecting pipes. It is disclosed that the hot water is boiled to a set temperature to supply the hot water.

[0008]

Since the conventional hot water storage type hot water supply apparatus and hot water storage type hot water supply system are configured as described above, in all of the conventional examples 1 to 6, the normal boiling temperature is about 85 ° C. This is high-temperature water, and when this high-temperature water is used for hot water supply at the terminal side, tap water is supplied to the vicinity of the tap as well as the hot-water pipe that supplies this high-temperature water to the vicinity of the tap of the building. A supply water pipe to be supplied is connected to a terminal water tap, and hot water and water are mixed by this water tap to an appropriate temperature, and hot water is obtained from a hot water tap provided immediately after that.

However, since the temperature of the hot water used for hot water supply is high, if the hot water supply pipe becomes a long tap like the taps provided at various places in the building, the temperature difference from the outside air will differ. Therefore, there is a problem that the hot water radiates heat while passing through the hot water supply pipe, resulting in a large heat loss and a large energy loss.

Further, in the conventional example 1, the hot water supply pipe and the return pipe are connected at the end of the branch pipe on the side of the tap, and when the tap is closed, hot water from the hot water tank is branched from the main pipe by the pump. It flows into the return pipe near the tap and is returned to the hot water storage tank again. As a result, hot water always circulates and exists in the vicinity of the tap, but there is a problem in that a hot water supply pipe, a branch pipe, and a return pipe are required, and the structure of these piping systems becomes very complicated.

Further, in the conventional example 2, the hot water supply heat source device and the terminal hot water supply device which are independent from each other are used to instantly make hot water, and in the case of hot water supply at multiple places, the equipment becomes large, and further, There was a problem that equipment costs increased. In addition, although the conventional examples 1 and 2 can be made into hot water immediately, the heat loss in the hot water supply pipe is not eliminated, so that there is a problem that the energy loss for heating the hot water increases and it is uneconomical.

In the conventional examples 3, 4, 5 and 6, when the hot water in the hot water storage tank is used for hot water supply, tap water pressure (water supply pressure) is used to push up the water in the tank to supply hot water. I am offering it to. However, this water supply pressure is restricted by the regulation that the tank internal pressure should be within 1.0 kgf / cm ² for the safety of the tank.

Therefore, in the present hot water heater, the pressure on the water supply side is reduced to a constant pressure of about 0.8 kgf / cm ² by the pressure reducing valve in consideration of the pressure increase due to the volume expansion of water due to heating. . Therefore, there is a pressure difference between the tap water pressure and the hot water supply pressure, and in the case of simultaneous hot water supply at multiple points on the use side (terminal side), the equipment stopper (mixed faucet) on the terminal side where hot water and water are mixed However, there was a problem that the hot water supply pressure was unilaterally insufficient, causing fluctuations in hot water temperature and hot water amount.

Further, in the conventional examples 3 and 4, opening / closing valves are respectively provided on the hot water supply port side and the hot water supply port side of each hot water storage tank, and the switching devices are sequentially operated while the switching devices are being operated. It circulates hot water to heat and store it. Therefore, when the hot water storage tank is composed of a plurality of hot water storage tanks, a large number of on-off valves are required, and in addition, a complicated operation of the on-off valves in the boiling process is required.

The present invention has been made in order to solve the above problems, and can perform stable hot water supply with little fluctuation in hot water temperature and hot water amount from the hot water storage tank, and also has a small heat loss in the hot water supply pipe and a complicated structure. It is an object of the present invention to provide a hot water storage type hot water supply device and a hot water storage type hot water supply system that can provide hot water efficiently with no problem.

[0016]

A hot water storage type hot water supply apparatus according to the present invention supplies hot water to taps provided at various places in a building through hot water supply pipes provided in the building. In, a hot water storage tank having a heater for warming water supplied from the water supply port and a hot water supply port, and hot water supplied from the hot water supply port and the hot water supply port connected to the hot water supply port of the hot water storage tank It is provided with a mixing device for mixing with the coming water and a mixed hot water outlet for discharging the mixed hot water mixed by the mixing device to a hot water supply pipe.

Further, an external water supply port connected to the external water supply pipe, the external water supply port and the water supply port of the hot water storage tank are connected,
A water supply pipe for supplying water supplied from the external water supply port to the hot water storage tank, and a bypass pipe for branching in the middle of the water supply pipe and supplying water supplied from the external water supply port to the mixing device. Further, it is provided with a pressure reducing valve for reducing the supply water pressure entering the hot water storage tank from the water supply port, and a pressurizing pump provided between the hot water outlet and the mixing device for pressurizing the hot water supply pressure from the hot water outlet.

The hot water temperature setting means for setting the hot water temperature of the mixed hot water, the hot water temperature detecting means for detecting the hot water temperature of the mixed hot water, and the set hot water temperature and hot water temperature detecting means set by the hot water temperature setting means. And a control means for controlling the pressurizing pump based on the detection signal. Further, a flow rate detecting means is provided on the secondary side of the pressurizing pump, and a control means for controlling the pressurizing pump based on a detection signal from the flow rate detecting means is provided.

The pressure setting means for setting the pressure applied by the pressure pump, the pressure detecting means provided on the secondary side of the pressure pump, the set pressure set by the pressure setting means and the pressure detecting means. And a control means for controlling the pressurizing pump based on the detection signal. Further, the hot water storage tank is composed of a plurality of tanks, and the plurality of tanks are connected in series by piping.

Further, in the hot water storage type hot water supply system according to the present invention, hot water is supplied from the hot water storage type hot water supply apparatus according to claim 1 to hot water taps provided in various places of the building through hot water supply pipes arranged in the building. In the hot water storage type hot water supply system, the mixing device connected to the hot water outlet of the hot water storage tank and mixing the hot water supplied from the hot water outlet with the water supplied from the water supply pipe at a variable ratio and the hot water temperature are set. The hot water temperature setting means and the control means for controlling the mixing device so that the hot water temperature is set by the hot water temperature setting means.

Further, the hot water temperature setting means provided corresponding to the plurality of hot water taps and the mixing device are controlled so that the highest hot water temperature setting among the hot water temperature settings made by these hot water temperature setting means can be obtained. And a control means.

[0022]

In the hot water storage type hot water supply apparatus according to the present invention, the hot water heated in the hot water storage tank is mixed with the water from the water supply pipe by the mixing device near the hot water storage tank so as to have an appropriate temperature. Discharge from the mixed hot water outlet to the hot water supply pipe installed in the building. In addition, the water supplied from the external water supply pipe through the external water supply port is divided into the water supply port side and the mixing device side in the water dividing section, and the hot water flowing into the hot water tank from the water supply port side is heated. The water divided to the mixing device side is appropriately mixed by the mixing device, and the mixed hot water is discharged from the mixed hot water outlet to the hot water supply pipe.

Further, the water decompressed by the pressure reducing valve flows into the tank from the water supply port and is heated, and the hot water discharged from the hot water outlet is pressurized by the pressure pump, and then the water from the water supply pipe is mixed by the mixing device. Is mixed appropriately. Further, the hot water temperature detecting means detects the hot water temperature of the mixed hot water, and the control means pressurizes while referring to the detection signal from the hot water temperature setting means so that the hot water temperature set by the hot water temperature setting means is obtained. Control the pump.

Further, the flow rate detecting means detects the flow rate on the secondary side of the pressurizing pump, and based on this detection signal, the control means controls the pressurizing pump so that the flow rate on the secondary side of the pressurizing pump becomes appropriate. Control. In addition, the pressure detection means detects the water pressure on the secondary side of the pressurizing pump, and the control means applies pressure while referring to the detection signal from the pressure detection means so that the water pressure set by the pressure setting means is obtained. Control the pump.

Water or hot water sequentially moves from the water supply port to the hot water outlet in a plurality of tanks connected in series, and the hot water discharged from the hot water outlet is pressurized by a pressure pump before being mixed. It is properly mixed with water from the water supply pipe in the device.

In the hot water storage type hot water supply system according to the present invention, the hot water heated in the hot water storage tank by the control means and the water from the water supply pipe are mixed so that the hot water temperature set by the hot water temperature setting means is obtained. By controlling the mixing ratio in the device, a desired mixed hot water is obtained, and this mixed hot water is discharged from the mixed hot water outlet to the hot water supply pipe arranged in the building. Further, of the hot water temperatures set by the hot water temperature setting means provided corresponding to the hot water taps, the control means is provided so that the hot water of the set hot water temperature can be obtained from the hot water taps at the locations where the highest hot water temperature is set. Controls the mixing ratio in the mixing device.

[0027]

【Example】

Example 1. Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a system configuration diagram showing a hot water storage type hot water supply system of the present invention. In the figure, 101 is a hot water storage type hot water supply device as described in detail in FIG. 2, and 102 is an external water supply pipe 103 connected to the hot water storage type hot water supply device. Reference numeral 101 denotes an external water supply port for taking in tap water from the external water supply pipe 103, and reference numeral 104 is connected to a hot water supply pipe 105 provided in the building and is mixed with tap water after being boiled by the hot water supply type hot water supply device 101. This is a mixed hot water outlet for discharging the mixed hot water heated to a predetermined temperature to the hot water supply pipe 105 and supplying it to various places in the building.

Reference numeral 106 denotes a hot-water tap provided at an appropriate place in the building, which is provided, for example, in a currant in a bathroom, a shower in a shower room, a water area in a kitchen, a laundry area, etc. Reference numeral 107 denotes a mixing tap provided immediately before the hot water tap, which mixes hot water supplied from the hot water storage type hot water supply apparatus 101 through the hot water supply pipe 105 with tap water supplied through the water supply pipe 103. The water temperature of each hot water tap is adjusted to an appropriate level before the hot water tap 106 is supplied. Incidentally, the water supply pipe 103,
The structures of the tap tap 106 and the mixing tap 107 are similar to those of the conventional one.

The hot water supply pipe 105 is different in that the mixed hot water flows inside, but the pipe structure is common in that it is made of the same heat-resistant material as the hot water supply pipe for supplying the boiling water from the conventional hot water storage type hot water supply device. Therefore, in the hot water storage hot water supply system of the present invention, except for the hot water storage hot water supply device, the piping in the building and the structure of the tap can be the same as the conventional one. Yes, it can be installed by the same piping work and replacement work as the conventional one.

FIG. 2 shows a hot water storage type hot water supply apparatus 10 shown in FIG.
1 is a configuration diagram showing an internal configuration of 1, in which 1 is a hot water storage tank built in a hot water storage type hot water supply apparatus 101, which is composed of four tanks 1a, 1b, 1c, and 1d, and the upper part of each tank is The outlets 2a, 2b, 2c, 2d are
Further, there are water supply ports 3a, 3b, 3c, 3d in the lower part, and the hot water outlet 2a of the tank 1a and the water supply port 3b of the tank 1b are connected by a connecting pipe 6a. Similarly, the hot water outlet 2b of the tank 1b and the tank 1c are connected. Of the tank 1c and the water supply port 3d of the tank 1d are connected by the connecting pipe 6c, and the tanks 1a to 1d are connected in series to form the hot water storage tank 1. ing.

The heaters 5a, 5b, 5c and 5d are provided in the tanks 1a, 1b, 1c and 1d, and heaters 5a, 5b, 5c and 5d are provided in the tanks 1a, 1b, 1c and 1d.
tanks 1a, 1b, 1 near a, 4b, 4c, 4d
c, 1d are temperature detecting means provided on the outer peripheral wall for detecting the water temperature in the tank. 7 is a pressurizing pump which is connected to the hot water outlet 2d of the tank 1d in the vicinity of the hot water outlet 2d through a connecting pipe to increase the water pressure of the hot water discharged from the hot water storage tank 1;
Is a pressure reducing valve connected to the water inlet 3a of the tank 1a in the vicinity of the water inlet 3a via a connecting pipe. Normally, the pressure of the secondary side of the pressure reducing valve 8 is set to about 0.80 kgf / cm ^2. Has been done.

Reference numeral 9 denotes a water supply pipe connected to the primary side of the pressure reducing valve 8, and one side serves as an external water supply port 102 for a hot water storage type water heater 10.
1 exposed to the outside and connected to an external water supply pipe 103, the other side is branched at a branch portion in the hot water storage water heater 101, and one end thereof is connected to the primary side of the pressure reducing valve 8, The 1st water supply pipe 9a which supplies water to the hot water storage tank 1 is comprised, and the other end part comprises the bypass pipe 9b.

Reference numeral 10 is connected to a hot water supply pipe 11 connected to the secondary side of the pressure pump 7 and a bypass pipe 9b, and bypasses hot water supplied from the hot water storage tank 1 via the pressure pump and the hot water supply pipe 11. This is a mixing device that mixes water supplied through the pipe 9b with a predetermined temperature to obtain a mixed hot water. Since the hot water heated by the heater flows from the hot water outlet 2d of the tank 1d to the mixing device 10, the distance is set as short as possible to minimize heat loss due to heat radiation.

Reference numeral 12 denotes a mixed hot water supply pipe for supplying the mixed hot water mixed by the mixing device 10 and having a predetermined temperature to the outside of the hot water storage type hot water supply device 101, and its end is exposed to the outside of the hot water storage type hot water supply device 101 as a mixed hot water outlet 104. However, it is connected to an external hot water supply pipe 105 appropriately disposed in the building. As described above, the hot water storage type hot water supply apparatus 101 has a water supply pipe 103 whose water supply side is external.
Is different in that it has an external water supply port 102 connected to, a mixed hot water outlet 104 connected to an external hot water supply pipe 105, and a pressure reducing valve 8 is provided inside the device so as to reduce the pressure after passing through a branch portion. Other than that, there is not much difference in appearance from the conventional one, and the system can be easily configured by replacing the conventional hot water storage type hot water supply device.

Reference numeral 106a denotes a hot water tap connected to the external hot water supply pipe 105 without passing through the mixing tap 107, and the hot water is tapped without adjusting the temperature. 13 is a mixed hot water supply pipe 1
2, a hot water temperature detecting means for detecting the hot water temperature of the mixed hot water,
Reference numeral 14 is provided in the hot water supply pipe 11, flow rate detecting means for detecting the flow rate of hot water on the secondary side of the pressurizing pump 7, for example, a flow rate switch or flow rate sensor, and 15 is provided in the hot water supply pipe 11.
It is a pressure detecting means such as a pressure sensor for detecting the water pressure on the secondary side of the pressurizing pump 7.

Reference numeral 16 denotes energization control of the heaters 4a, 4b, 4c, 4d, pressure control of the pressurizing pump 7, and the mixing device 10.
Control means for controlling the mixing ratio of hot water and water, etc., is connected to the temperature detecting means 5a to 5d, the hot water temperature detecting means 13, the flow rate detecting means 14 and the pressure detecting means 15, and inputs detection signals from each of them. are doing. The control means 16 is connected to these various controlled means and detection means by signal lines.

Reference numeral 17 denotes a hot water temperature setting means which can arbitrarily set the hot water temperature of the mixed hot water from the outside, and is provided on the outer wall of the hot water supply type hot water supply apparatus 101 as a switch panel or the like, or is constituted by an external remote control device. 18 is a pressure pump 7
It is a pressure setting means that allows the pressure of (1) to be set arbitrarily, and is similarly composed of a switch panel, a remote controller, and the like. These setting means are connected to the control means 16, and the hot water temperature control means 16a and the pressurization control means 16b of the control means 16 perform appropriate control according to the setting operation. Note that the broken lines in FIG. 2 indicate signal lines, which exchange detection signals and control signals between the control means and each component.

The operation of the hot water storage type hot water supply apparatus configured as described above will be described below. The water supplied from the external water supply pipe 103 is supplied from the external water supply port 102 to the hot water storage type water heater 10.
The water flowing into the pressure reducing valve 8 after passing through the branch portion and the pressure reducing valve 8 has a predetermined water pressure (here, about 0.8 kgf).
/ Cm < ² >), the flow rate is reduced from the water supply port 3a of the tank 1a of the hot water storage tank 1 to the tank 1a, and the water is stored in the tanks 1a to 1d. The stored water is set to a boiling temperature (for example, 85 ° C.) set by the temperature detecting means 5a-5d such as a thermistor using the AC200V power source, for example, late night electric power, which is inexpensive, by the heaters 4a-4d provided in each tank. Is heated and boiled until it is detected.

For example, as the boiling time when the midnight power is used, the rated capacity of the total hot water storage tank 1 is 370 l,
When the heater capacity of each heater 4a to 4d is 1 kW and the water temperature in the hot water storage tank 1 is 15 ° C., it takes 7.5 hours to boil the water in the hot water storage tank 1 to 85 ° C. Be boiled. Then, when the tap tap 106 provided at an appropriate place in the building is opened via the hot water supply pipe 105 connected to the terminal side of the mixed hot water supply pipe 12, the tap water pressure acting through the pressure reducing valve 8 Hot water storage tanks 1a to 1 that were boiled up and stored
Hot water in d is pushed up, and hot water storage tank 1 on the final stage side
Hot water flows out from the outlet port 2d of d.

At this time, water equivalent to the amount of hot water that has flowed out is supplied through the water supply pipe 9a to the water supply port 3 of the hot water storage tank 1a on the first stage side.
Water is automatically supplied from a. 8 that flowed out of the tap 2d
The hot water at a high temperature of 5 ° C. is mixed with the water branched from the primary side of the pressure reducing valve 8 and supplied through the bypass pipe 9b in the mixing device 10 at a predetermined ratio between 0 and 1, to obtain a predetermined temperature. It is controlled to (for example, 40 ° C.), and hot water is discharged from the hot water tap 106 through the mixed hot water supply pipe 12 and the hot water supply pipe 105. Depending on the required hot water temperature, the mixing device 1
At 0, only hot water or water may be discharged or discharged. After this, if the hot water discharged from the hot water tap 106 is higher than the desired temperature, it may be mixed with the water supplied from the water supply pipe 103 by the mixing tap 107 and lowered to the desired temperature.

Here, the hot water temperature control means 16 of the control means 16
a indicates that the hot water temperature of the mixed hot water is obtained from the hot water temperature detecting means 13, and the hot water temperature of the mixing device 10 is controlled by, for example, an actuator so as to obtain the hot water temperature of the set temperature based on the set signal from the hot water temperature setting means 17. Control such as changing the ratio with the water valve. Then, the mixed hot water whose temperature is lowered in advance is the hot water supply pipe 10
It is supplied to various places in the building through 5. Since the mixed hot water after being mixed by the mixing device 10 has fallen to the level of actual use, compared to the case where the hot water boiled as it is is supplied to the hot water supply pipe 105 by the hot water supply pipe 105, the temperature of the hot air with the outside air The difference is small, the decrease in hot water temperature during passage through the hot water supply pipe is small, and energy loss is reduced.

Further, for example, in the hot-water tap 106 on the terminal side, if hot water is simultaneously discharged at a plurality of places, the pressure sharply drops. Since the hot water storage tank 1 is heated, the pressure on the water supply side is reduced to a constant pressure of about 0.8 kgf / cm ² by the pressure reducing valve 8 for the convenience of volume expansion of water, etc., and as a result, the water supply pressure is insufficient. Therefore, there is a possibility that the hot water and hot water amount of hot water discharged from the hot water tap 106 may fluctuate. Even in such a case, stable hot water can be supplied to the mixing device 10 by increasing the hot water supply pressure by the pressurizing pump 7, and the stable hot water temperature / temperature can be supplied via the mixing device 10.
The amount of hot water can be provided, the hot water temperature of the mixed hot water does not become unstable, and the pressure shortage on the terminal side can be eliminated.

The timing of starting or stopping the pressure pump 7 is controlled by the control means 16 based on the detection signal from the flow rate detection means 14 provided in the hot water supply pipe 11 on the secondary side of the pressure pump 7. As a result, even if the water pressure of the hot water supply pipe 105 changes due to the use of the hot water tap 106 at the end, it is possible to control the pressurizing pump 7 and adjust the amount of hot water mixed while keeping the temperature of the hot water mixing in the mixing device 10 constant. Become. Further, the pressurization control means 16 b of the control means 16 obtains the water pressure on the secondary side of the pressurization pump 7 from the pressure detection means 15, and the pressure setting means 18
The pressurizing pump is controlled by, for example, an inverter so that the set pressure can be obtained based on the set signal from.

This makes it possible to make adjustments when it is desired to set the pressure level to a certain predetermined level depending on the piping structure in the building, its modification, and the original water pressure conditions. When the hot water storage tank is composed of the plurality of tanks 1a to 1d as in the present embodiment, the diameter of the tank can be reduced as compared with the case where a single tank is used, as long as the tank has the same capacity.
Thinning can be achieved in a specific direction. This allows it to be installed under the floor or in a narrow space. By the way, in general, when a hot water storage tank is configured by a plurality of such tanks, the pressure difference, that is, the pressure drop between the water supply port and the hot water outlet is large due to the amount of the connecting pipes, and the effect of providing the pressure pump is large.

The pressurizing pump of the present embodiment is different from the conventional pump provided to only raise the water pressure in the middle of the external hot water supply pipe in order to supply hot water to a high place. It has a unique function in stabilizing the temperature and volume of the mixed hot water when obtaining mixed hot water, but as a result, the pressure drops in the hot water storage tank, which makes up the hot water storage tank with multiple tanks. Even when it is applied to a large device, it greatly contributes to the recovery of the pressure, and one pressurizing pump can be operated efficiently. Further, since the pressure control depends on the hot water temperature and the hot water amount of the mixed hot water, a complicated control of the pressurizing pump is not particularly required for recovery of the pressure drop in the tank due to the structure of the hot water storage tank.

Further, the hot water storage tank is composed of a plurality of tanks 1a to 1a.
In the case of being configured by d, the heater capacity of the tank 1d on the final stage side is larger than the heater capacity of the other tanks 1a to 1c, for example, the capacity of the heater 4a of the tank 1d on the final stage side is 4.5.
KW, if the capacity of the heaters 4a to 4c of the other tanks 1a to 1c is set to 1.5 KW, when the hot water amount of the boiling temperature of the tank 1d on the final stage side is insufficient due to an increase in hot water supply load, the heater of this tank 1d It is possible to energize only 4d and shorten the re-pushing time to prevent running out of hot water.

When boiling is performed in the plurality of tanks 1a to 1d, the heater 4d of the tank 1d on the final stage side and the heaters 4a to 4c of the other tanks 1a to 1c are divided and controlled to perform boiling. To do. Heater 4d of the last stage tank 1d
The capacity of 4.5 kW, heaters 4 of other tanks 1a-1c
When the divided energization control is performed with the capacities of a to 4c being 1.5 kW each, the heater capacity of the tank 1d on the final stage side and the total heater capacity of the other tanks 1a to 1c are both 4.5 kW and the same capacity. While the heater 4d is energized, the other heater 4a
Since power supply to 4c is stopped, the total power consumption of the heater does not become larger than that of the conventional one having the same capacity, the contracted power can be reduced, and the heater 4d is first energized to discharge hot water. The hot water storage tank 1d on the side can be quickly boiled up, and the hot water can be supplied.

Example 2. Next, another embodiment will be described. FIG. 3 is a system configuration diagram showing a hot water storage type hot water supply system of the present invention. In the figure, parts similar to or corresponding to those of the first embodiment are designated by the same reference numerals, and description thereof will be omitted. Reference numeral 101 denotes a hot water supply type hot water supply apparatus as described in detail in FIG.
Reference numeral 08 denotes hot water temperature setting means provided in the vicinity of each hot water tap, which is composed of a touch panel or the like, and which is provided immediately before the hot water tap 106 corresponding to the setting operation.
A control unit for controlling the mixing ratio of 7 is built in, and the temperature of the hot water discharged is adjusted to the set temperature.

Reference numeral 109 is a signal line for signal connection between the hot water temperature setting means 108 and the control means 16 of the hot water storage type hot water supply apparatus 101.
Information on the set hot water temperature is sent to the control means 16. 4 is a configuration diagram showing an internal configuration of the hot water storage type hot water supply apparatus 101 shown in FIG. 3, in which the control means 16 is signal-connected to an external hot water temperature setting means 108 by a signal line 109. . The hot water temperature setting means 17 is a hot water storage type hot water supply device 101.
It is provided in itself and does not have a corresponding tap, but sets the hot water temperature of the mixed hot water as shown in the first embodiment. Other configurations are the same as those in the first embodiment.

Next, the operation will be described. Water pipe 103
The operation of heating the water supplied from the above and supplying the mixed hot water to the hot water tap 106 through the hot water supply pipe 105 is the same as that of the first embodiment. A feature of the present embodiment is that hot water temperature setting means 108 is provided for the taps 106 provided at various places in the building, if necessary.
In accordance with the information on the set hot water temperature set in accordance with each request in 8, the mixed hot water and the water are mixed by the mixing tap 107 at an appropriate mixing ratio, and an appropriate hot water temperature is provided from the hot water tap 106. It

Information on the set hot water temperature set by the hot water temperature setting means 108 is sent to the control means 16 via the signal line 109.
Sent to. Here, out of the set hot water temperatures set by the hot water temperature setting means 108, it is sufficient that the hot water tap 106 requesting the highest hot water temperature can obtain this hot water temperature, and the remaining hot water taps 106 have this hot water temperature. Since a lower hot water temperature is required, the water supply pipe 103 is appropriately set by each mixing plug 107.
Mix with water from. Thereby, the control means 16
Is a mixing device 1 that lowers the temperature of the mixed hot water to around this set temperature so that the hot water set at the highest temperature can be provided.
The mixing ratio of hot water and water at 0 is controlled.

As a result, the temperature of the hot water supply pipe 105 is lowered to a required level, and the mixed hot water having the smallest temperature difference from the outside air flows, so that the hot water temperature decreases while passing through the hot water supply pipe 105. Can be minimized and energy loss is reduced. Although the decrease in hot water temperature is small, the hot water supply pipe 105, which has a relatively long distance and is installed in a building
It is inevitable that the water temperature will drop slightly while passing through the
The control means 16 controls the mixing device 10 to generate mixed hot water having a hot water temperature slightly higher than the set hot water temperature set by the hot water temperature setting means 108.

As this control method, for example, the set temperature of the hot water temperature setting means 108 which has the highest set temperature is 4
If the temperature is 0 ° C, information about this set temperature is sent to signal line 1
The control means 16 taken in via the 09, the hot water temperature control means 16a of the mixing device 10 so that the hot water temperature detected by the hot water temperature detecting means 13 provided in the hot water supply pipe 12 is 42 ° C. Control the ratio. Although the temperature of the mixed hot water is 42 ° C. immediately after it exits the mixing device 10, the hot water supply pipe 105
While passing through the water, the heat was gradually taken away by the outside air, and the tap 1
By the time the hot water is discharged from 06, the temperature is around 40 ° C.

It should be noted that the temperature difference between the set temperature set by the hot water temperature setting means 108 and the hot water temperature of the mixed hot water mixed by the control means 16 in the mixing device 10 is determined by the system during installation work of this system. The temperature difference may be programmed in advance in the control means 16 for each hot water tap 106, and the hot water temperature is set individually for each hot water tap 106 or the hot water temperature setting device 108 corresponding thereto. Is sent to the control means 16 together with the set temperature information via the signal line 109, the set temperature of the hot water temperature setting means 108 having the highest set temperature is individually given to the hot water temperature setting means 108. The mixing device 10 may generate a mixed hot water having a positive temperature difference.

[0055]

As described above, according to the present invention, in the hot water supply type hot water supply device for supplying hot water to the hot water taps provided in various places of the building through the hot water supply pipe arranged in the building A hot water storage tank having a heater for warming the water supplied from the water supply port and a hot water supply port, and hot water supplied from the hot water supply port and supplied from the hot water supply port and the water supply pipe Since the mixing device that mixes water and the mixed hot water outlet that discharges the mixed hot water mixed by the mixing device to the hot water supply pipe are provided, the heat radiation amount of the hot water in the hot water supply pipe is reduced and energy loss can be reduced. The effect is obtained.

Further, the external water supply port connected to the external water supply pipe, the external water supply port and the water supply port of the hot water storage tank are connected,
Since the water supply pipe that supplies the water supplied from the external water supply port to the hot water storage tank and the bypass pipe that branches in the middle of this water supply pipe and that supplies the water supplied from the external water supply port to the mixing device, The water supply pipe to supply to the tank and the water supply pipe to supply to the mixing device can be obtained from one external water supply pipe, which has the effect of facilitating piping work and facilitating replacement with the conventional water heater. To be

Further, since the pressure reducing valve for reducing the water supply pressure entering the hot water storage tank from the water supply port and the pressurizing pump provided between the hot water outlet and the mixing device for pressurizing the hot water supply pressure from the hot water outlet are provided, It is possible to provide a stable amount of hot water and the amount of hot water through the mixing device, the temperature of the mixed hot water does not become unstable, and a stable amount of hot water can be supplied to the end side.

The hot water temperature setting means for setting the hot water temperature of the mixed hot water, the hot water temperature detecting means for detecting the hot water temperature of the mixed hot water, and the set hot water temperature and hot water temperature detecting means set by the hot water temperature setting means. Since the control means for controlling the pressurizing pump based on the detection signal is provided, even if the water pressure of the hot water supply pipe changes according to the usage status of the mixed hot water, the mixing ratio of the hot water and the water can be adjusted by the mixing device. By controlling the water pressure on the hot water side with the pressurizing pump while maintaining the temperature, it is possible to obtain the effect that the desired hot water temperature of the mixed hot water can be supplied without a pressure shortage.

Further, the flow rate detecting means is provided on the secondary side of the pressurizing pump, and the control means for controlling the pressurizing pump based on the detection signal from the flow rate detecting means is provided. It is possible to obtain an effect that the flow rate of hot water can be controlled by the pressurizing pump so as to obtain the mixed hot water, and the timing of starting or stopping the pressurizing pump can be accurately controlled.

Further, from the pressure setting means for setting the pressure applied by the pressure pump, the pressure detecting means provided on the secondary side of the pressure pump, and the set pressure and the pressure detecting means set by the pressure setting means. Since it is equipped with a control means for controlling the pressurizing pump based on the detection signal of the pressurizing pump, the pressure of the pressurizing pump can be properly set for various piping structures with different water pressures, and the mixing device can mix at a predetermined temperature. The effect that the water pressure of hot water required to obtain hot water can be controlled is obtained.

Further, since the hot water storage tank is composed of a plurality of tanks and the plurality of tanks are connected in series by piping, the hot water storage tank can be downsized, and the pressure on the outlet side due to the plurality of tanks can be reduced. In the case of a decrease, the effect that the pressure can be efficiently recovered by using the pressurizing pump used for stabilizing the hot water temperature and the hot water amount is obtained.

Further, in the hot water storage type hot water supply system for supplying hot water from the hot water storage type hot water supply apparatus according to claim 1 to hot water taps provided at various places of the building through hot water supply pipes arranged in the building, A mixing device connected to the hot water outlet and mixing hot water supplied from the hot water outlet with water supplied from the water supply pipe at a variable ratio, hot water temperature setting means for setting the hot water temperature, and the hot water temperature With the control means for controlling the mixing device to the hot water temperature set by the setting means, the mixed hot water having the desired hot water temperature is supplied from the hot water storage type hot water supply device to the hot water supply pipe. The amount of heat released from the hot water is reduced and the energy loss can be reduced.

Further, the hot water temperature setting means provided corresponding to the plurality of hot water taps and the mixing device are controlled so that the highest hot water temperature setting among the hot water temperature settings made by these hot water temperature setting means can be obtained. Since it is equipped with a control means, it is possible to flow mixed hot water with a temperature difference from the outside air to the required minimum in the hot water supply pipe, minimizing the decrease in hot water temperature while passing through the hot water supply pipe and reducing energy loss. The effect of doing is obtained.

[Brief description of drawings]

FIG. 1 is a system configuration diagram showing a hot water storage type hot water supply system according to a first embodiment of the present invention.

FIG. 2 is a configuration diagram showing a hot water storage type hot water supply device according to Embodiment 1 of the present invention.

FIG. 3 is a system configuration diagram showing a hot water storage type hot water supply system according to a second embodiment of the present invention.

FIG. 4 is a configuration diagram showing a hot water storage type hot water supply device according to a second embodiment of the present invention.

[Explanation of symbols]

1 Hot water storage tank, 2 Hot water outlet, 3 Water inlet, 4
Heater, 5 temperature detecting means, 6 connecting pipe, 7 pressurizing pump, 8 pressure reducing valve, 9 water supply pipe, 9a first
Water supply pipe, 9b bypass pipe, 10 mixing device, 12 mixed hot water supply pipe, 13 hot water temperature detecting means,
14 flow rate detecting means, 15 pressure detecting means, 16
Control means, 17 Hot water temperature setting means, 18 Pressure setting means, 101 Hot water storage type hot water supply device, 102 External water supply port, 103 External water supply pipe, 104 Mixed hot water discharge port,
105 hot water supply pipe, 106 hot water tap, 107 mixing tap, 108 hot water temperature setting means, 109 signal line

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Akira Naito 800 Iwamatsu, Oshima-cho, Nitta-gun, Gunma Sanryo Electric Co., Ltd. Gunma Factory

Claims (9)

[Claims] 1. A hot water storage type hot water supply device for supplying hot water to hot water taps provided at various places in the building through hot water supply pipes provided in the building, wherein the hot water supply port has a hot water supply port and a hot water supply port. A hot water storage tank having a built-in heater for warming the water supplied from the mouth, and a mixing device connected to the hot water outlet of the hot water storage tank to mix hot water supplied from the hot water outlet and water supplied from the water supply pipe A hot water storage type hot water supply device comprising: a hot water supply port for discharging hot water mixed by the mixing device to the hot water supply pipe. 2. An external water supply port connected to an external water supply pipe,
A water supply pipe that connects the external water supply port and the water supply port of the hot water storage tank to supply the water supplied from the external water supply port to the hot water storage tank, and the water supply pipe branches in the middle of the water supply pipe to supply water from the external water supply port. The hot water storage type hot water supply apparatus according to claim 1, further comprising a bypass pipe for supplying the mixed water to the mixing apparatus. 3. A pressure reducing valve for reducing the supply water pressure from the water supply port into the hot water storage tank, and a pressurizing pump provided between the hot water outlet and the mixing device for pressurizing the hot water supply pressure from the hot water outlet. The hot water storage type hot water supply apparatus according to claim 1, further comprising: 4. The hot water temperature setting means for setting the hot water temperature of the mixed hot water, the hot water temperature detecting means for detecting the hot water temperature of the mixed hot water, and the hot water temperature set by the hot water temperature setting means and the hot water. The hot water storage type hot water supply apparatus according to claim 3, further comprising: a control unit that controls the pressurizing pump based on a detection signal from the temperature detection unit. 5. The flow rate detecting means is provided on the secondary side of the pressurizing pump, and the control means is provided for controlling the pressurizing pump based on a detection signal from the flow rate detecting means. Hot water storage type hot water supply device described. 6. A pressure setting means for setting a pressure to be applied by a pressurizing pump, a pressure detecting means provided on a secondary side of the pressurizing pump, a set pressure set by the pressure setting means, and the pressure. The hot water storage type hot water supply apparatus according to claim 3, further comprising: a control unit that controls the pressurizing pump based on a detection signal from the detection unit. 7. The hot water storage type hot water supply apparatus according to claim 3, wherein the hot water storage tank comprises a plurality of tanks, and the plurality of tanks are connected in series by piping. 8. A hot water storage type hot water supply system for supplying hot water from the hot water storage hot water supply device according to claim 1 to hot water taps provided at various places in a building through hot water supply pipes provided in the building. A mixing device which is connected to the hot water outlet of the tank and mixes hot water supplied from the hot water outlet with water supplied from the water supply pipe at a variable ratio; hot water temperature setting means for setting hot water temperature; A hot water storage type hot water supply system, comprising: control means for controlling the mixing device so that the hot water temperature is set by the hot water temperature setting means. 9. A hot water temperature setting means provided corresponding to a plurality of hot water taps, and the mixing device is controlled so as to obtain the highest hot water temperature setting of the hot water temperature set by these hot water temperature setting means. 9. The hot water storage type hot water supply system according to claim 8, further comprising: