JPH0615251Y2 - Hot water heater with reheating and bubble generation function - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a water heater having a reheating function and a bubble generating function by connecting a bathtub to the water heater.

[Conventional technology]

It has a heat exchanger that heats the bathtub and the bathtub water, and a circulation pump that forcibly circulates the bathtub water. These are connected by forward and backward circulation pipes, and the bathtub water is forcibly circulated and boiled when the circulation pump operates. There is known a water heater in which an upper circulation port connected to a recirculation pipe has a nozzle and an air intake pipe seen through to add a bubble generating function.

[Problems to be solved by the invention] The circulation pump is used to forcibly circulate the hot water in the bathtub. However, once the hot water in the bathtub is removed, air flows into the forward / backward circulation pipes and the heat exchanger 3. If water is poured into the bathtub to enter and reuse it, and if it reheats or activates the bubble generation function, the air remaining in the heat exchanger and circulation pipe must be artificially expelled to prevent air resistance during circulation. Has the drawback of increasing the noise level due to the addition of water, and the drawback that the circulation of hot water is not smooth.

[Means for solving problems]

To eliminate the air pool in the circulation pipe and heat exchanger described above,
There is a method to artificially remove the air by using an air vent cock, but the air vent is not performed every time it is used, and people often put up with noise. In this device, the flow of hot water in the pipe is accelerated to force the air out. In order to speed up the flow of hot water, smooth the flow of hot water until it reaches the circulation pump to increase the flow rate, and since it is not necessary to pass through the heat exchanger one by one when bubbles occur, It is only necessary to make a short circuit, and this plan is a concrete example of this.

〔Example〕

The structure will be described below with reference to the drawings showing an embodiment. 1 is a bathtub which may be made of wood, resin or metal, and has circulation ports 6.2 at the upper and lower portions respectively. 3 is a heat exchanger, which is an internal mechanism of a water heater that uses oil, gas, electricity, etc. as heat sources, 4 is a forward circulation pipe that connects the lower circulation port 4 and the heat exchanger 3, and 7 is an upper circulation port 6 The recirculation pipes 5 for communicating the return of the heat exchanger 3 with the heat exchanger 3 are circulation pumps provided in the middle of the recirculation pipe 7, and circulate the hot water in the bathtub 1 to the heat exchanger 3 through the reciprocating circulation pipes 4 and 7. Used to reheat the hot water in the bath tub, 8 is an air intake pipe, which is used to look into the upper circulation port 6 together with a nozzle (not shown), and is used to send bubbles into the bath tub 9, and 9 is the forward circulation pipe 4. A bypass pipe that communicates with the middle of the recirculation pipe 7 is used for reheating, and at the time of start-up and for the degree of bubble generation, the hot water in the bathtub is returned from the outward circulation pipe 4 via the circulation pump 5 without passing through the heat exchanger 3. Circulation pipe 7
10 is an opening / closing valve provided in the middle of the bypass pipe 9 for opening and closing the path of the hot water which branches from the outward circulation pipe 4 and flows to the bypass pipe 9. This opening / closing valve 10 is operated manually or The T-shaped cheese pipe 11 is provided in the middle of the bypass pipe 9 communicating from the on-off valve 10 to the recirculation pipe 7, and one side of the cheese pipe 11 is provided in the middle of the outward circulation pipe 4. The three-way valve 12, which communicates with one side of the three-way valve 12, may be either manually or electrically opened and closed. The hot water generated by switching the three-way valve 12 is fed from the outgoing circulation pipe 4 to the bypass pipe 9 in the middle of the T-shaped cheese pipe 11 It flows in the direction of.

[Action]

In the present invention having the above-mentioned configuration, when the burner of the water heater and the circulation pump 5 are operated, the heat exchanger 3 is heated by the burner, and the hot water in the bathtub 1 is moved to the reciprocating circulation pipes 4 → 7 while the heat exchanger 3 is activated. It is heated through and warms the hot water in the bathtub 1 (reheating). Then, the opening / closing valve 10 is opened for a while at the start of reheating, and a part of the flow of the hot water in the outward circulation pipe 4 is guided to the bypass pipe 9 to be joined to the outward circulation pipe 7. On the other hand, most of the hot water flowing through the outward circulation pipe 4 goes through the three-way valve 12 → heat exchanger 3 to the recirculation pipe 7 → circulation pump 5 and returns to the bathtub 1, that is, recirculation to the circulation pump 5 for a while at the start. When a large amount of hot water is supplied from both sides of the pipe 7 and the bypass pipe 9 and the open / close valve 10 (electromagnetic valve) is closed after a certain period of time, the flow path of the outward circulation pipe 4 → the heat exchanger 3 → the circulation pump 5 is formed. Next, when the air bubble generating function is desired, the outward circulation pipe 4 → the heat exchanger 3 is closed by the three-way valve 12, and the T-shaped cheese pipe
When switching to the 11-direction and opening the on-off valve 10, the hot water of the outward circulation pipe 4 is concentrated on the on-off valve 10 and the three-way valve via the T-shaped cheese pipe 11 from the bypass pipe 9 to the circulation pump 5, and the recirculation pipe. 7
Return to Bathtub 1 via. Then, the air is taken into the nozzle from the air intake pipe 8 to form bubbles, which are supplied to the bathtub 1.

Therefore, at the time of start-up, hot air having a flow rate exceeding the discharge capacity of the circulation pump 5 containing air in the circulation pipe is supplied as a confluence of both the recirculation pipe 7 and the bypass pipe 9 to expedite air removal.

〔effect〕

According to the present invention, as described above, the air in the circulation pipe is quickly exhausted, so that the flow passage resistance at the time of starting the reheating and the generation of bubbles is reduced and the noise is reduced. Further, even if the reheating is started, if there is no air in the circulation pipe, the hot water is smoothly circulated and the efficiency is improved.

[Brief description of drawings]

The drawing is a piping diagram of a main part of the present invention, FIG. 1 shows a flow of hot water when using reheating, and FIG. 2 shows a flow when bubbles are generated. 1 ... Bathtub, 2 ... Lower circulation port, 3 ... Heat exchanger, 4 ...
Outgoing circulation pipe, 5 ... Circulation pump, 6 ... Upper circulation port, 7
...... Recirculation pipe, 8 …… Air intake pipe, 9 …… Bypass pipe,
10 …… Open / close valve, 11 …… T-shaped cheese, 12 …… Three-way valve.

Claims (3)

[Scope of utility model registration request] 1. A recirculation pipe 4 connects a lower circulation port 2 of a bath 1 to a heat exchanger 3 and a recirculation pipe 7 connects the heat exchanger 3 to an upper circulation port 6 of a bath 1 through a circulation pump 5. In the hot water heater with the reheating function described above, the upper circulation port 6 has no nozzle and the air intake pipe 8 in sight, and the forward circulation pipe 4 is a bypass pipe communicating with the circulation pump 5 in the middle of the return circulation pipe 7. 9 is branched, an on-off valve 10 and a T-shaped cheese 11 are provided in the middle of the bypass pipe 9, and a three-way valve 12 is provided in the middle of the outward circulation pipe 4 so that one side of the three-way valve 12 is connected to the bypass pipe 9. A water heater with reheating and air bubble generation functions that merges with T-shaped cheese 11. 2. A water heater with a reheating and bubble generating function according to claim 1, wherein the on-off valve 10 and the three-way valve 12 are electrically operated valves. 3. The reheating and air bubbles according to claim 1, characterized in that the on-off valve (10) is configured to be opened for a certain period of time at the start of the repulsion function and to be normally open at the time of the air bubble generation function. Water heater with generating function.