JPS6349640A - One boiler with two water paths device - Google Patents

Abstract

PURPOSE:To prevent the capacity reduction in a warm water circuit for a bath at the simultaneous use time of space heating and the bath by a method wherein the discharge pipe at the outlet side of a reheat exchanger and the return pipe at the inlet side of a hot water storage tank are connected and a variable by-pass circuit where a water valve is controlled variably by the circulating warm water quantity to a space heating load is equipped. CONSTITUTION:Upstream of the radiators 5 of one boiler with two water paths device, a variable by-pass circuit 18 connecting a discharge pipe 15 with o return pipe 16 is installed and on the way a water valve 14 controlled variably by the circulating water quantity to the radiators 5 is installed. By this constitution, the flow quantity for space heating outside the radiators is zero (even a set of radiator is not operated), the opening at the circuit 18 is fully opened and the necessary circulating water quantity corresponding to the capacity of the warm water circuit B for a bath flows in the flow path of a reheat exchanger 9-the circuit 18. When the flow quantity outside the radiators is much (three radiators are used), the opening at the circuit 18 is brought in a closing direction and the flow path is changed to the exchanger 9-the radiators 5, however, at the reheat exchanger more water quantity than the necessary circulating water quantity to the circuit B flows and the capacity of the warm water circuit for the bath is secured.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a one-can, two-water system in a hot water circuit of a complex device used for hot water supply, space heating, direct bath circulation, and the like.

BACKGROUND OF THE INVENTION In recent years, can and water systems have been installed in complex equipment, and are highly compatible with the trend toward compactness and multifunctionality.

An example of the above-mentioned conventional one-can and two-water device will be described below with reference to the drawings.

FIGS. 4 and 5 show the configuration of a conventional one-can, two-water system and the characteristics of the amount of hot water being circulated. In FIG. 4, 1 is the heating hot water circuit's outgoing pipe 15. This is a pump that circulates hot water through the return pipe 16. 2 is a heat exchanger connected to the heating hot water circuit. 3 detects the hot water temperature at the outlet of the heat exchanger 2;
A thermistor that controls the amount of gas flowing into the burner via the control unit makes a sound to control the hot water temperature. A burner 4 is controlled by a thermistor 3 via a control unit to heat the heat exchanger 2 and exchange heat with hot water. 5 is a radiator that performs heating by exchanging total heat with hot water. Reference numeral 6 denotes a fixed bypass circuit within the main body 17, which allows hot water to circulate throughout the entire main body 17 when the outgoing pipe 16 and the returning pipe 16 are short-circuited and the radiator 5 is not used. 8 is a tank, which is a hot water storage tank. A reheat exchanger 9 exchanges heat with the other bath hot water circuit B and is used to heat bath water such as a bath. A pump 10 circulates the hot water in the other bath hot water circuit B completely.

Reference numeral 11 denotes a thermistor that detects the temperature of the hot water returned from the hot water circuit B and controls the hot water temperature. 12 is a heat exchanger inserted into the reheat exchanger 9. 13 is a bathtub.

The operation of the one-can and two-water apparatus configured as described above will be explained below.

First, water pumped out by the pump 1 is heated by a burner 4 in a heat exchanger 2 for heat exchange, and is controlled to a predetermined hot water temperature by a thermistor 3 at the outlet of the heat exchanger 2. The hot water flows through the outgoing pipe 16, passes through the reheating/exchanger 9, is divided into the fixed bypass circuit e and each radiator 6, returns to the returning pipe 16 which is the return hot water circuit, and is then returned to the tank 8 in the heating hot water circuit. It forms a system. The water sent to the pump 10 is sent to the bathtub 13 via the heat exchanger 12 in the reheat exchanger 9 in the heating hot water circuit, and the water in the lower part of the bathtub 13 is sent to the pump 10 and the thermistor 11 A bath hot water circuit Bi of direct circulation is formed which operates until the water temperature in the bathtub 13 reaches a set water temperature.

Problems to be Solved by the Invention However, with the above configuration, when heating and bathing are used at the same time, the amount of hot water flowing through the bypass circuit 6 is constant. The amount of circulating water flowing to the reheat exchanger 9 is variable! -1 There were problems in that the amount of circulating water was too small and the capacity of the bath circuit B could not be maintained, and the capacity of the pump 1 was larger than necessary.

In view of the above-mentioned problems, the present invention makes it possible to select a pump with an appropriate pumping capacity by making the bypass circuit of the heating hot water circuit a variable bypass circuit.

To provide a one-can, two-water device that completely prevents a decrease in the performance of a bath hot water circuit when baths are used at the same time.

Means for solving all the problems In order to solve the above problems, the one-can and two-water device of the present invention has the following features:
Outlet section 1llIII of the reheat exchanger in the hot water heating circuit
It is completely equipped with a variable bypass circuit that has an open connection between the outgoing pipe in the VC and the return pipe on the inlet side of the tank in the heating source/water circuit, and is equipped with a water flow valve that varies depending on the amount of circulating water.

Effect The present invention has the above-described configuration, so that the outside flow rate of heating is 0 (
When no radiator is operating), the variable bypass circuit is fully opened, and the required amount of circulating water according to the capacity of the bath hot water circuit flows through the flow path from the reheat exchanger to the variable bypass circuit. Also, if the external flow rate is large (using 3 radiators),
The opening degree of the variable bypass circuit is in the closing direction, and the reheat exchanger ~
Although the flow path is changed to the radiator, the amount of water flowing through the reheat exchanger is greater than the required amount of circulating water to the bath hot water circuit, and the capacity of the bath hot water circuit is not guaranteed.

EXAMPLE Hereinafter, a one-can and two-water apparatus according to an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 shows the structure of a one-can and two-water apparatus in a first embodiment of the present invention. In FIG. 1, the same parts as those in the conventional example are given the same reference numerals and will be explained in detail, and different parts will be mainly explained.

A variable bypass circuit 18 connects the outgoing pipe 15 and the returning pipe 16 in front of the radiator 15, and is provided with a water flow valve 14 that is variable depending on the amount of circulating water to the radiator 5 in the middle.

Regarding the two-can water device configured as above, ・
The operation will be explained below using FIG. 1, FIG. 2, and FIG. 3.

First, Figure 2 shows the H-Q characteristics 2 of the pump 1 in the heating hot water circuit. Depending on the number of radiators 6 used, the amount of circulating water flowing in the heating hot water circuit A is A, B, C, It shows that it has changed to D. At that time, the amount of circulating water was
The amount of circulating water required for the other bath hot water circuit B is set. In such a case, as shown in FIG. 3, if the number of radiators is zero, the amount of circulating water flowing through the reheat exchanger 9 will be such that if the number of radiators is zero, the water amount valve 14 of the variable bypass circuit 6 will be fully opened, and the amount of water flowing through the reheat exchanger 9 will be reduced.
When hot water flows by amount A in the flow path of the variable bypass circuit 6 and the number of radiators 6 is three, the water flow valve 1 of the variable bypass circuit 6
4 is closed, reheat exchanger 9゜The amount of circulating water of person in the flow path of each radiator 5 is the total amount of circulating water of D? Obtainable.

As described above, according to this embodiment, the amount of circulating water to the outside (to the radiator) is transferred between the outlet side of the reheat exchanger 9 and the return side of the tank 80 inlet. By providing a variable bypass circuit 18 equipped with a water volume valve 14 that is variable, it is possible to select a pump 1 with an appropriate pumping capacity, and it is possible to prevent a decrease in the performance of the bath hot water circuit when heating and bathing are used simultaneously.

Effects of the Invention As described above, the present invention provides a system for controlling the amount of circulating water to the heating load such as a radiator between the outlet of the reheat exchanger and the inlet of the tank, which is a hot water storage tank, in a heating hot water circuit consisting of an outgoing pipe and a returning pipe. We have installed a variable bypass circuit with a water flow valve that can be adjusted by
To prevent a decrease in the capacity of a bath hot water circuit when a bath is used at the same time, and to make effective use of the pump capacity.

[Brief explanation of drawings]

Figure 1 is a configuration diagram of a one-can, two-water system in an embodiment of the present invention, Figure 2 is a pump H-Q characteristic diagram of Figure 1, and Figure 3 is a diagram of the pump H-Q characteristics of the pump in Figure 1.
The circulation flow rate characteristic diagram shown in FIG. 4 is a block diagram of a conventional one-can and two-water device. 1...Pump, 2...Heat exchanger, 6.
...Radiator (heating load), 18...Variable bypass circuit, 8...Tank, 9...
Reheat exchanger, 10...Pump, 11...
Thermistor, 12...Heat exchanger, A...
・Heating hot water circuit, B...Bath hot water circuit. Name of agent: Patent attorney Toshio Nakao and 1 other person f-
--Pump 12---Sardine basket 2--Power burst 74--Water flow valve Fig. 1 5--Radiation amount I5-Outgoing pipe 8--
Tank 16--Return pipe Fig. 2

Claims (1)

[Claims] A hot water heating circuit that connects the heating load, a heat exchanger that forms hot water, a hot water storage tank, a reheat exchanger, and a pump that circulates hot water to the outbound and return pipes, and the reheat exchanger of this hot water heating circuit. A hot water circuit for a bath or the like to be heated, an outgoing pipe on the outlet side of the reheat exchanger, and a return pipe on the inlet side of the hot water storage tank are connected, and the amount of water is varied depending on the amount of hot water circulated to the heating load. A one-can, two-water device characterized by being equipped with a variable bypass circuit equipped with a valve.