JPH018908Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a water supply device using an instantaneous water heater.

Generally, in instantaneous water heaters, there is an upper limit to the combustion capacity of the burner, so if you want to obtain hot water at a high temperature, it is necessary to reduce the amount of hot water supplied. Therefore, when a large amount of hot water is required, a storage type water heater is better, but such water heaters require a large installation area, take a long time to boil water from cold water, and have problems in keeping warm after boiling. Therefore, it has disadvantages such as high fuel consumption.

On the other hand, if multiple instantaneous water heaters are installed in parallel to supply hot water, the above-mentioned problems can be solved and a sufficient amount of hot water can be supplied, but in this configuration, the amount of water flowing to each water heater There is a way to equalize the
For example, if the water flow rate is different and the water flow rate to one water heater is less than the minimum operating water flow rate, the other water heater will not be able to heat up and its capacity will be halved, meaning that it will not be possible to provide satisfactory hot water. Become.

The present invention is intended to solve the above-mentioned problems, and will be described below based on an embodiment shown in the drawings. 1
A and 1b are wall-mounted instantaneous water heaters installed adjacently in parallel, and both have the same configuration in terms of heating capacity, water flow resistance, and control conditions. 2 is the exhaust port,
3 is an air supply port. Reference numeral 4 denotes an operating device installed in the kitchen, etc. When an operation switch 41 provided on this operating device 4 is turned on, both instantaneous water heaters 1a and 1b are simultaneously combusted, and by setting the hot water temperature with a temperature controller 42, both instantaneous water heaters 1a and 1b are fired. The instantaneous water heaters 1a and 1b dispense hot water at the same set temperature. Reference numeral 5 denotes an electric cord for supplying the above-mentioned control signals and power to both instantaneous water heaters 1a and 1b. In addition, instantaneous water heaters 1a, 1b
A temperature detector (not shown) is provided at the outlet of the heat exchanger, and the difference between the hot water temperature detected by this temperature sensor and the above set temperature is used to control the gas proportional valve using PID control to obtain hot water at the set temperature. This is a proportional control type. 6a, 6b, 7
Reference characters a and 7b are a water supply pipe and a hot water outlet pipe of the instantaneous water heaters 1a and 1b, respectively. Reference numeral 8a denotes a T-shaped branch fitting, and the inlet 81a of the branch fitting 8a is connected to the water supply source 9, and the outlet 82a is connected to the water supply pipe 6 of one instantaneous water heater 1a.
A and the branch port 83a are connected to the water supply pipe 6b of the other instantaneous water heater 1b via a water supply connection pipe 10. Also, the hot water outlet pipe 7b of the other instantaneous water heater 1b
is connected to the inlet 81b of the branch fitting 8b which is the same as the branch fitting 8a described above, and the outlet pipe 7a of one instantaneous water heater 1a is connected to the branch port 83b via the outlet connection pipe 11.
The outlet 82b is connected to a hot water pipe 12 connected to an indoor supply source. The water supply connection pipe 10 and the hot water outlet connection pipe 11 are the same parts, have the same diameter, and the same length.

The present invention has the above configuration, and when the hot water tap (not shown) provided at the end of the hot water supply pipe 12 is opened, water is supplied to the instantaneous water heaters 1a and 1b.
At that time, one instantaneous water heater 1a has a branch fitting 8a,
Water is supplied through a water supply pipe 6a, and a hot water outlet pipe 7a,
Hot water is supplied via the hot water connection pipe 11 and the branch metal fitting 8b. Also, a branch fitting 8 is attached to the other instantaneous water heater 1b.
Water is supplied via the water supply connection pipe 10 and the water supply pipe 6b, and hot water is supplied via the hot water outlet pipe 7b and the branch fitting 8b.

Since the internal resistance of each instantaneous water heater is equal, the water flow resistance of each instantaneous water heater explained above is affected by the conditions of the external piping. By the way, according to the present invention, the water supply and hot water tap branching fittings are made of the same parts, and the water supply connection pipe and the hot water tap connection pipe are also made of the same parts, so that each instantaneous water heater 1a from the hot water supply source 9 to the hot water supply pipe 12 , 1b are equal in length and piping resistance, so that the same amount of water flows through each instantaneous water heater 1a, 1b.

Therefore, according to the present invention, for example, there is no difference in the minimum operating water flow rate of both instantaneous water heaters, and therefore the hot water dispensing capacity of both instantaneous water heaters can be utilized to the maximum, and installation is easy and the hot water dispensing capacity can be reduced. It is possible to provide a large water heater, and by sharing parts, it can greatly contribute to reducing the price of the water heater.

[Brief explanation of the drawing]

The drawing is an overall configuration diagram showing an embodiment of the present invention. 1a... Instantaneous water heater, 1b... Instantaneous water heater, 6
a... Water supply pipe, 6b... Water supply pipe, 7a... Hot water outlet pipe, 7b... Hot water outlet pipe, 8a... Branch fitting, 8b...
... Branch fitting, 10 ... Water supply connection pipe, 11 ...
Hot water connection pipe.

Claims (1)

[Scope of utility model registration request] A branch fitting connected to a water supply source is connected to one water supply pipe of a plurality of identical instantaneous water heaters installed in parallel, and the branch fitting is connected to the other water supply pipe via a water supply connection pipe, and the water supply source is connected to the branch fitting connected to the water supply source. A branch fitting that is the same as the connected branch fitting is connected to the hot water outlet pipe of the other instantaneous water heater, and the hot water outlet pipe of one instantaneous water heater is connected to a hot water outlet connection pipe using the same parts as the water supply connection pipe. A hot water supply device characterized in that it is connected to the branch metal fitting via.