JPH04347452A - Hot water feeder - Google Patents

Abstract

PURPOSE:To provide a wireless remote controlled hot water feeding device operated under an application of electromagnetic wave in which an efficient transmitting and receiving operation can be carried out when the hot water feeding device is installed within a pipe shaft of a condominium building and the like, n particular. CONSTITUTION:A hot water feeder device is comprised of a hot water feeding machine 1 covered by a metallic casing, a rod-like antenna 3 for the hot water feeding machine fixed while being spaced-apart by a distance of 1/4 of a transmitting/receiving wave-length from a side surface of the casing, a remote controller 11 for the hot water feeding machine 1 operated under an application of electromagnetic wave and a hot water feeding transmitting/receiving device 2 for transmitting or receiving a controlled signal. The antenna 3 of the hot water feeding machine can ensure an efficient performance of antenna even in a pipe shaft, resulting in that a wireless controlled hot water feeding device requiring no wiring work can be realized.

Description

[Detailed description of the invention]

0001

[Industrial Application Field] The present invention relates to a water heater that heats water using gas, oil, electricity, etc., and particularly relates to an antenna for a water heater with a wireless remote control that enables easier installation. .

0002

2. Description of the Related Art In a conventional water heater of this type, as shown in FIG. The remote control cable 20 passes through the remote control cable 20 and connects the water heater 1 with the control signal from the remote control 11.
is configured to be transmitted to.

[0003] Furthermore, as a wireless remote control, there is Japanese Utility Model Application Publication No. 57-77671, and a configuration has already been devised in which a wireless remote control using radio waves can be used to remotely control a water heater, and the status of a water heater can be remotely monitored using a wireless remote controller. has been done.

0004

[Problems to be Solved by the Invention] However, in the configuration of the conventional remote control cable method described above, when installing a water heater, a hole 9a is made in the wall 9 and the remote control cable 20 consisting of 2 to 8 core signal lines is passed through. It was necessary to connect the water heater 1 and the remote control 11. Therefore, there were problems in that it required penetrating work through the wall and that there was a fear that a remote control cable connection error would occur.

[0005]Furthermore, in the configuration of the water heater using the wireless remote control described above, there is almost no disclosure regarding the specific configuration of the antenna for efficiently transmitting and receiving radio waves. However, in order to put this type of wireless remote control hot water heater into practical use, the antenna and the method for attaching the antenna are very important issues.

[0006] The present invention solves the above problems, and provides a wireless remote control type water heater that does not require drilling holes in the wall or connecting cables, has good workability, and is equipped with an efficient antenna. It is something.

[0007]

[Means for Solving the Problems] In order to solve the above problems, the water heater of the present invention includes a water heater covered with a metal casing and a remote controller for the water heater using radio waves provided inside the water heater. This system includes a water heater transmitter/receiver that transmits and receives control signals to and from the water heater, and a rod-shaped water heater antenna installed parallel to the side surface of the water heater housing at a distance of 1/4 wavelength from the side surface.

[0008]

[Operation] With the above configuration, the present invention can prevent the direct waves from the antenna and the reflected waves from the water heater casing from combining and canceling each other out, thereby realizing a water heater capable of efficient transmission and reception.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Examples of the present invention will be described below with reference to FIGS. 1 to 3. In FIG. 1, 1 is a water heater, 2 is a hot water transmitter/receiver, 3 is a water heater antenna, and 4 is a controller for controlling transmission and reception and the overall operation of the water heater 1. In an apartment building such as a condominium, the water heater 1 is installed in a pipe shaft near the ceiling and away from the floor 5 as shown in the figure. 6 is a door for opening and closing the pipe shaft space. 7 is an exhaust port of the water heater 1, which passes through the door 6 and is led to the outside. Pipes 8 are for supplying water, hot water, fuel, etc., and are usually vertically raised from the floor 5 side and connected at the bottom of the water heater 1. Reference numeral 9 denotes a wall surface of the pipe shaft, which is usually a block or concrete wall, through which radio waves emitted from the water heater antenna 3 and the remote control antenna 10 are transmitted. 11 is a remote control, and 12 is a remote control transmitter/receiver. The water heater antenna 3 is a monopole antenna that is attached parallel to the surface of the casing 1a of the water heater 1 at a distance of 1/4 of the wavelength of the transmitted and received radio waves from the side surface of the casing 1a. 13 is an antenna cable that connects the water heater antenna 3 and the transmitter/receiver 2.

FIG. 2 is a characteristic graph of the transmission output according to the distance between the water heater casing and the water heater antenna in the embodiment. When the antenna is placed parallel to the side of the water heater housing,
At a receiving point in the opposite direction from the antenna to the housing, the direct wave from the antenna and the reflected wave from the housing are combined and received. Therefore, the strength of the radio waves transmitted to the reception point varies greatly depending on the distance between the antenna and the water heater housing. In the example, the installation distance at which the direct wave and the reflected wave are in the same phase and the combined wave is maximized is set to 1/4 wavelength. However, there is an error in installation accuracy that is equivalent to the thickness of the antenna.

[0011] With the above configuration, the water heater antenna 3
Because it can be installed in the empty space inside the pipe shaft,
It is attached away from and parallel to the side surface of the casing 1a of the water heater 1. At this time, by setting the installation distance to about 1/4 of the wavelength of the transmitted and received radio waves, an efficient water heater antenna can be constructed.

FIG. 3 is a control function block diagram of the water heater 1 and the remote controller 11. 14 is a temperature sensor, 15 is a combustor, and 16 is a water heater power source, which is controlled by the controller 4 and realizes the functions of the water heater 1.

The remote control 11 includes a display 17 and an operation device 18.
, a remote control power source 19, and a remote control transmitter/receiver 12. Also, a hot water transmitter/receiver 2 in the water heater 1 and a remote control 11
The remote control transmitter/receivers 12 inside can communicate with each other via radio waves via their antennas 3 and 10.

[0014] With this configuration, the contents operated by the operating device 18 of the remote control 11 are transmitted to the remote control antenna 10.
When the signal is transmitted as a radio wave signal to the water heater 1 side, the water heater transmitter/receiver 2 receives it, and the controller 4 operates the water heater 1 based on the content. Further, when the operating state of the water heater 1 is transmitted from the hot water supply transmitter/receiver 2 to the remote control 11 side via the water heater antenna 3, the operating state is transmitted to the remote control transmitter/receiver 12
It receives the signal and outputs it to the display 17.

[0015]

[Effects of the Invention] As described above, according to the water heater of the present invention, the following effects can be obtained.

(1) Since the antenna is provided at a position 1/4 wavelength of the transmitted and received radio waves from the water heater housing, the direct waves and reflected waves are in the same phase, making it possible to realize an efficient antenna.

(2) A practical wireless remote control water heater that does not require remote control cable work can be provided.

[Brief explanation of drawings]

FIG. 1 is an external view of a water heater in an embodiment of the present invention.

FIG. 2 is a characteristic graph of transmission output depending on the distance between the water heater housing and the hot water antenna.

FIG. 3 is a control block diagram of the same.

FIG. 4 is an external view of a conventional water heater.

[Explanation of symbols]

1 Water heater 2 Hot water transmitter/receiver 3 Water heater antenna 11 Remote control

Claims (1)

[Claims] 1. A water heater covered by a metal casing, a hot water transmitter/receiver that transmits and receives control signals between the water heater's remote control using radio waves, and a water heater that transmits and receives radio waves from the side of the water heater's casing. /A water heater equipped with a water heater antenna installed parallel to the side and separated by 4 wavelengths.