JP2002013802A - Wall penetration installation type hot water supply appliance - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wall penetration installation type hot water supply appliance wherein an outer casing can be miniaturized and made light weight to reduce a protrusion size to the outside, and hence workability due to the making light weight is improved and limitation of an installation position due to the miniaturization can be reduced, and further a user can automatically achieve introduction of hot water of a predetermined amount into a bathtub. SOLUTION: A wall penetration installation type hot water supply appliance is adapted as follows. A hot water tube wound around one heat exchanger 4 in an outer casing 26 is divided into one for a hot water supply cock tube 24 connected to hot water supply cock 16 and one for a bathtub tube 18 connected to a bath adapter 20 located at a lower portion of the bathtub to introduce hot water into a bathtub 19, and a hot water supply connection port 8 for the hot water supply tube and a hot water introduction connection port 9 for the bathtub tube are protruded to the outside from the outer casing 26. The wall penetration installation type hot water supply appliance is installed on a wall surface 28 of a bathroom, etc., such that the foregoing connection ports are located on the inside of the room.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water heater installed in a wall.

[0002]

2. Description of the Related Art As a device developed for effective use of a bathroom space, a large water bath can be used by installing a water heater installed in a bathroom in a hole provided in a wall surface of the bathroom. 2. Description of the Related Art Wall-mounted water heaters are known. This wall penetration type water heater has a hot water supply function to the hot water tap and a reheating function of reheating the hot water in the bathtub, and a heat exchanger for hot water supply and reheating for hot water in the outer case and Built-in combustor, etc., protrude the piping of these built-in devices to the outside of the outer case,
A hot water tap and a circulation pipe for additional heating are connected.

[0003] Further, the through-the-wall type water heater is installed in the hole provided in the bathroom wall so that the air supply / exhaust port of the outer case projects outward as described above.

[0004] When the bathtub is filled with hot water by a wall penetrating type water heater, the hot water tap is manually opened and the hot water is dropped from the tapping pipe into the bathtub.
In some cases, the user sets the bathtub hot water amount in advance, and when the hot water amount reaches the set amount, the user leaves the hot water with a buzzer. The user recognizes the completion of the hot water filling by the notification sound and closes the hot water tap.

[0005] However, the conventional wall penetrating type hot water supply system has a heat exchanger and a combustor for hot water supply and a reheating tank in the outer case, and additionally recirculates the hot water in the bathtub for reheating. The size of the exterior case in the depth direction is large because it has a built-in circulation pump, and when it is installed in a hole in the bathroom wall, the projected size of the supply / exhaust port portion of the exterior case to the outside of the bathroom wall becomes large. As a result, particularly in an apartment or the like, there is a problem that the passage where the air supply / exhaust port portion protrudes is narrowed or the installation location is restricted due to the relationship with an obstacle.

In addition, the work of filling a bathtub with a conventional through-the-wall type hot water supply system requires waiting visually while the hot water accumulates, which wastes time and causes a buzzer to notify the user. However, it is necessary for the user to manually close the hot water tap.

[0007]

SUMMARY OF THE INVENTION According to the present invention, the outer case can be reduced in size and weight, and the projecting dimension to the outside can be shortened. It is an object of the present invention to reduce the restrictions and to provide a through-the-wall water heater capable of automatically filling a bathtub with a predetermined amount of hot water by a user.

[0008]

The present invention relates to the following. (1) A bathtub in which a hot water pipe wound around one heat exchanger in an outer case is connected to a hot water supply pipe connected to a hot water tap and to a bath adapter at a lower part of the bathtub to fill the bathtub. The hot water supply connection port for the hot water supply pipe and the hot water connection port for the bathtub pipe protrude outward from the outer case, respectively, and are installed on the wall surface such that these connection ports are located on the indoor side. Through-wall type water heater. (2) A heat exchanger, a hot water pipe on the downstream side of the heat exchanger, a hot water tap pipe branched from the hot water pipe and connected to a hot water tap, and a bathtub pipe branched from the hot water pipe and connected to a bathtub. Having an opening / closing valve and a water amount sensor in the bathtub tube, integrating means for calculating the amount of hot water in the bathtub by integrating the amount of water obtained from the water amount sensor, and setting means for presetting the amount of hot water in the bathtub. A control unit having an opening / closing means for performing opening / closing control of the on / off valve, wherein the control unit makes the amount of hot water in the bathtub calculated by the integrating means equal to the amount of hot water in the bathtub set by the setting means. The water heater with penetrating wall according to (1), wherein the on-off valve is closed at the point of time. (3) The through-wall type water heater according to (2), wherein the on-off valve closes when hot water is supplied from the hot water tap.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION The through-wall type water heater according to the present invention is an outer case of a through-wall type water heater instead of the conventional bath-through type water heater which requires a circulating pump. To the hot water connection port that protrudes outward from the
By connecting a bathtub tube connected to a bath adapter provided in the lower part of the bathtub, the bathtub is filled with water from the lower part of the bathtub, thereby reducing heat radiation from the bathtub compared to reheating and improving thermal efficiency. .

[0010] Therefore, in the outer case of the penetrating wall type water heater, a single heat exchanger serving both as a hot water tap and for filling the hot water from the lower part of the bathtub, a combustion section and the like are incorporated.
The hot water pipe wound around the heat exchanger is branched into a hot water supply pipe connected to a hot water tap and a bathtub pipe connected to a bath adapter below the bathtub to fill the bathtub from below.

[0011] The installation location of the water heater through the wall according to the present invention is preferably a hole provided in the wall of the bathroom,
However, the present invention is not limited to this, and it may be installed in a hole provided on the wall surface of the outer wall such as a washroom, a kitchen, or a dressing room.

[0012] The heat exchanger used in the through-wall type water heater of the present invention is not particularly limited as long as it can heat water by heat exchange. The heat source is a gas or oil burner. Etc. can be used, and it is particularly preferable to use a gas burner.

The hot water tap used in the present invention is not particularly limited as long as the user can open the valve when the user desires hot water. Specifically, a hot water tap such as a curan or a shower is used. Can be used.

The bathtub used in the present invention is not particularly limited as long as it is a commonly used bathtub, and a metal or synthetic resin bathtub can be suitably used.

The on-off valve used in the present invention is not particularly limited as long as it is an on-off valve capable of passing water and stopping water, and a water solenoid valve can be suitably used. Further, it is more preferable that the on-off valve is provided with an atmosphere opening mechanism for replacing water in the pipe downstream of the valve with air when the valve is closed. Further, when the hot water tap is opened while the open / close valve is being opened, it is preferable to close the open / close valve and give priority to hot water supply from the hot water tap.

As the water amount sensor used in the present invention, a commonly used water amount sensor can be used. Specifically, a magnet is mounted on an impeller which rotates by a water flow, and the rotation of the magnet is controlled by an electric pulse using a Hall IC. A signal that is converted into a signal and output, and the amount of water is detected by counting the pulse signal by a microcomputer can be used.

The control unit used in the present invention has an integrating means, a setting means and an opening / closing control means, and more specifically, a microcomputer can be used. Describing each means, the integrating means calculates the total amount of hot water supplied to the bathtub (hereinafter referred to as the amount of hot water in the bathtub) by integrating the amount of water obtained from the water amount sensor. The setting means allows the user to store an arbitrary amount of hot water in the bathtub in the microcomputer, and inputs the information from an operation unit such as a remote controller electrically connected to the control unit. The opening / closing control means controls opening and closing of the opening / closing valve, and is preferably opened when hot water is supplied to the bathtub and closed when hot water is supplied to the hot water tap.

The control unit has the above three means to perform automatic hot water filling control on the bathtub. When an automatic hot water filling instruction is input from the user, the control unit opens the on-off valve and simultaneously uses the integrating means. Determine the amount of hot water in the bathtub, close the on-off valve when the value of the amount of hot water in the bathtub increases with time and the value of the amount of hot water in the bathtub set by the setting means,
The automatic filling control ends.

[0019]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic diagram showing an embodiment of the present invention in which a water heater installed in a through-wall type is connected to a bathtub, and FIG. 2 is a perspective view of the bathroom installed in FIG. As shown in FIG. 1, in the through-wall type water heater, a heat exchanger 4 is installed inside an outer case 26, and a combustion unit 25 serving as a heat source is provided below the heat exchanger 4.
Is provided. The combustion unit 25 guides the gas from the gas connection port 11, supplies and stops the gas with the gas solenoid valve 12, and controls the gas amount with the proportional valve 13. Further, since the combustion unit 25 is formed by a plurality of gas burners, the combustion unit 25 is provided with the hot water supply electromagnetic valve 14 for selecting gas supply to each gas burner. Furthermore, the supply of oxygen required for combustion is
This is performed by forcibly supplying air to the combustion unit 25 using the blower 10.

The water for heat exchange is introduced from the water supply port 1,
The water flows into the heat exchanger 4 via the water amount sensor 2 and the water temperature sensor 3, exchanges heat with the heat from the combustion unit 25, and is heated. The hot water that has passed through the heat exchanger 4 branches in two directions after passing through the water control valve 5 and the water temperature sensor 6, one of which is connected to the hot water / shower tap 16 by a hot water tap pipe 24, and the other is connected by a bathtub pipe 18. Connected to bathtub 19.

Bathtub pipe 18 branched downstream of water temperature sensor 6
A water solenoid valve 17 for selecting hot water supply to the bathtub 19 is provided in a pipe connected to the tub 19, and the bathtub 19 can be filled with water by opening the water solenoid valve 17. In addition, the water solenoid valve 17 includes an atmosphere release mechanism that opens the atmosphere when the valve is closed, and replaces water in the pipe downstream of the water solenoid valve 17 with air. Further, the water solenoid valve 17 includes:
A drain 27 is provided so that water can be drained when the piping is prevented from freezing in winter.

The exterior case 26 of the water heater installed in the through-wall type is
As shown in FIG. 2, the water supply port 1, the gas connection port 11, the hot water connection port 8, and the hot water connection port 9 protruding from the outer case 26.
Is located in the interior of a bathroom or the like, and is installed in a hole in the bathroom wall surface 28 so that the air supply / exhaust port projects outward. A hot water supply pipe 24 is connected to the hot water supply connection port 8 and a bathtub pipe 18 is connected to the hot water connection port 9. Then, the bathtub is filled with water from the bath adapter 20 to which the tip of the bathtub tube 18 is connected.

Next, a control unit 15 shown in FIG. 1 is a microcomputer having an integrating means, a setting means and an opening / closing control means and used for controlling the equipment. Operate the equipment. The remote control 21 has a hot water supply switch 23 which is pressed when hot water is desired.
And an automatic switch 22 which is pressed when bathtub filling is automatically performed, and a hot water temperature setting button and a bathtub hot water amount setting button (not shown).

The operation when the hot water / shower tap 16 is used will be described. A user desiring hot water presses the hot water supply switch 23 of the remote controller 21 and then opens the hot water / shower tap 16 to set it in advance. Hot water at a reduced temperature can be obtained. This is because when the hot water / shower tap 16 is opened, water flows into the heat exchanger 4 from the water supply port 1 and the control unit 1
5 detects the amount of inflowing water with the water amount sensor 2 and the water temperature with the water temperature sensor 3, adjusts the proportional valve 13 so that the water temperature is set by the user, burns the combustion part 25, and performs heat exchange. By doing. Further, when the amount of hot water desired by the user is large and a request exceeding the capacity of the heat exchanger 4 is received, the amount of hot water is narrowed down by the water control valve 5 to reduce the amount of hot water supplied, and To supply. Further, when the hot water / shower tap 16 is used, the water solenoid valve 17 is closed, so that the entire amount of hot water passes through the hot water tap pipe 24 and is discharged from the callan or shower.

A description will be given of the operation when the bathtub is automatically filled with water. The user can automatically fill the bathtub simply by pressing the automatic switch 22 of the remote controller 21. This is because, when the control unit 15 presses the automatic switch 22, the water solenoid valve 17 is opened to guide water from the water supply port 1 to the heat exchanger 4, and the proportional valve 13 is adjusted to the set temperature. By heating the water and supplying it from the bath adapter 20 to the bathtub 19 via the water amount sensor 7. The control section 15 calculates the hot water quantity in the bathtub by integrating the hot water quantity obtained from the water quantity sensor 7 by the integrating means, and when the hot water quantity in the bathtub is set by the setting means, closes the water solenoid valve 17 by the opening / closing control means. Then, the combustion in the combustion section 25 is stopped.

Normally, the hot water supply / shower tap 16 is closed during automatic hot water filling, so that the entire amount of hot water is supplied to the bathtub 1.
9, when the hot water supply / shower tap 16 is opened during automatic filling, the control unit 15 closes the water solenoid valve 17 to temporarily suspend the filling operation. The method of detecting that the hot water / shower tap 16 was opened during the automatic filling is as follows.
Although there are various methods, in the present embodiment, the fact that the amount of hot water supplied during automatic filling is constant is used to detect a change in the amount of water obtained from the water amount sensor 7.

[0027]

According to the present invention, there is provided a water heater installed in a through-wall type in which a hot water tube wound around one heat exchanger in an outer case is provided inside the outer case for a hot water supply pipe connected to a hot water tap and a lower part of a bathtub. And a hot water supply connection port for the hot water supply tap pipe and a hot water supply connection port for the bathtub pipe are projected outward from the outer case, respectively. The hot water tube wound around the heat exchanger is connected to the hot water tap tube connected to the hot water tap and the bath adapter at the bottom of the bathtub in this exterior case. It is branched into a bathtub tube to be filled with hot water in the bathtub, and a bath adapter is connected to a connection port for the bathtub tube so as to fill the bathtub with a bath adapter at a lower portion of the bathtub. Heat exchange for reheating The depth of the outer case can be reduced by eliminating the need for a vessel, a combustor, and a circulating pump, and the outer dimension of the outer case can be shortened. It is an inexpensive penetrating wall type water heater with less restrictions on the installation place due to the construction.

According to the hot water supply device of the present invention, bath tub filling can be performed automatically, so that the user does not waste time and forgets to close the hot water tap. Water can be prevented from being wasted.
Further, since hot water can be supplied from the hot-water tap even during automatic hot water filling, water that is not heated is not discharged from the hot-water tap, so that a shower or the like can be always used with confidence.

[Brief description of the drawings]

FIG. 1 is a schematic diagram of a water heater installed in a through-wall type according to an embodiment of the present invention connected to a bathtub.

FIG. 2 is an explanatory perspective view showing a state where the wall-piercing installation type water heater shown in FIG. 1 is installed in a bathroom.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Water supply port 2 Water quantity sensor 3 Water temperature sensor 4 Heat exchanger 5 Water control valve 6 Water quantity sensor 7 Water quantity sensor 8 Hot water supply port (hot water supply connection port) 9 Filling connection port 10 Blower 11 Gas connection port 12 Gas solenoid valve 13 Proportional valve 14 Hot water supply electromagnetic valve 15 Control unit 16 Hot water supply / shower tap 17 Water solenoid valve 18 Bathtub pipe 19 Bathtub 20 Bath adapter 21 Remote control 22 Automatic switch 23 Hot water supply switch 24 Hot water supply tap pipe 25 Combustion unit 26 Exterior case 27 Drain 28 Wall surface

Continued on the front page (72) Inventor Takeshi Ogawa 1250 Shimoe-ren, Shimodate-shi, Ibaraki F-term in the Yuki Works of Hitachi Chemical Co., Ltd. (Reference) 3L024 CC06 CC16 DD01 DD15 DD16 DD46 EE02 GG18 GG22 GG24 HH03 HH13

Claims (3)

[Claims] A hot water pipe wound around one heat exchanger in an outer case is connected to a hot water supply pipe connected to a hot water tap and to a bath adapter at a lower part of the bath tub, and is filled with hot water in the bath tub. And a hot water supply connection port for the hot water supply faucet pipe and a hot water connection port for the bathtub pipe are projected outward from the outer case, respectively, so that these connection ports are located on the indoor side. Wall-mounted water heater installed on the wall. 2. A heat exchanger, a hot water pipe downstream of the heat exchanger, a hot water tap pipe branched from the hot water pipe and connected to a hot water tap.
A bathtub pipe branched from the hot water pipe and connected to a bathtub, an opening / closing valve and a water quantity sensor are installed on the bathtub pipe, and an integrating means for integrating the water quantity obtained from the water quantity sensor to obtain the hot water quantity in the bathtub. And a control unit having setting means for presetting the amount of hot water in the bathtub and opening / closing means for performing opening / closing control of the on-off valve, and this control unit calculates the amount of hot water in the bathtub calculated by the integrating means. 2. The water heater according to claim 1, wherein the on-off valve is closed when the amount of hot water in the bathtub set by the setting means becomes equal. 3. The hot water heater of claim 2, wherein the on-off valve closes when hot water is supplied from a hot water tap.