JPS60101446A - Hot water temperature controlling device of dual water circuit-in-two heater type hot water supplying space heater - Google Patents

Abstract

PURPOSE:To contrive to stabilize the hot water temperatures and to reduce the cost by a method wherein the temperature of hot water for both hot water supplying and space heating are controlled by adjusting the burning rates of the respective burners by means of a single proportional control valve. CONSTITUTION:A hot water supplying solenoid valve 9 and a space heating solenoid valve 13 are respectively provided on pipes, which are forked from a pipe connecting a main solenoid valve 8 and a proportional control valve 10 in series and lead respectively to burners 11 and 15. Signals sent from a hot water supplying thermistor 16 arranged at the outlet of a hot water supplying heat exchanger 1 and from a space heating thermistor 20 arranged at the outlet of a space heating heat exchanger 2 are connected through respective comparators 17 and 29 to a single proportional control valve driving unit 19 so as to drive the proportional control valve 10 by the signal sent from the driving unit 19 in order to control the burning rates of the burners 11 and 15. Due to the structure as mentioned above, because the valve 10 by means of a single proportional control valve driving unit 19 and the respective hot water temperature can also be proportionally controlled by the signals sent from the thermistors 16 and 20, the stabilization of the hot water temperatures can be realized. In addition, because the fuel passage is composed of a few parts and only one circuit is required for controlling hot water temperature, the cost of the titled device becomes cheaper.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a hot water temperature control device for a two-can, two-water hot water heater.

Configuration of conventional example and its problems The hot water temperature control device of the conventional 2-can 2-water hot water heater uses a proportional control valve on the hot water supply side to stabilize the hot water temperature through proportional control, and a solenoid valve on the heating side. Using a plurality of , Hi - Lo -
The mainstream method was to control the hot water temperature using OFF combustion.

This is a so-called composite product that simply incorporates a water heater and a space heater into a single box, making it extremely expensive.

FIG. 1 shows a schematic diagram of the configuration of a conventional example.

1 is a hot water supply heat exchanger connected to a water supply port 1a and a hot water supply port 1b. 2 is a heating heat exchanger connected to a hot water return port 2a and a hot water outlet 2b.

A pump 3, an expansion tank 4, and a bypass pipe 5 are installed in the heating hot water passage to constitute a heating hot water passage.

An overflow pipe 6 is connected to the expansion tank 4.

An exhaust stack 7 is connected to each heat exchanger 1.2.

The fuel passage branches from the original solenoid valve 5Vo8, passes through the hot water supply solenoid valve SVw9 and the proportional control valve PSV10, and connects to the hot water supply burner 11 with the heating LO solenoid valve SVL 12 and the heating HI
It is connected to a heating burner 15 through a solenoid valve 5VII 13 and a bypass passage 14.

A thermistor 16 for hot water supply is provided at the outlet of the heat exchanger 1 for hot water supply, and the thermistor signal is sent to a comparator 17 and a hot water temperature setting device 1.
The proportional control valve drive unit 19 is operated by the signal No. 8, and the proportional control valve 1o is operated to control the combustion amount of the hot water supply burner 11 so as to keep the hot water temperature constant. .

On the other hand, a heating thermistor 20 is installed at the outlet of the heating heat exchanger 2.
The heating water temperature control circuit 21 is operated by the server star signal, the heating Lo solenoid valve 12- and the heating Hi solenoid valve 13 are operated, and the combustion amount of the heating burner 16 is controlled. Control the water temperature to be constant.

In order to control each water temperature, there are many fuel passage components.
Furthermore, since a circuit for controlling the hot water temperature is required for each of hot water supply and heating, the cost is high.

OBJECTS OF THE INVENTION In view of the above drawbacks, the present invention aims to provide a hot water temperature control device that stably controls the hot water temperature for hot water supply and heating at low cost by reducing the number of parts and circuits.

Structure of the Invention In order to achieve this object, the hot water temperature control device for a hot water heater according to the present invention connects a main solenoid valve and a proportional control valve in series, branches to each burner, and connects a solenoid valve for hot water supply and a solenoid valve for heating. A solenoid valve is provided, and the signals from the hot water supply server at the outlet of the hot water supply heat exchanger and the heating server at the outlet of the heating heat exchanger are passed through each comparator to drive one proportional control valve. The proportional control valve is connected to the proportional control valve drive section, and the proportional control valve is driven by a signal from the proportional control valve drive section, thereby controlling the combustion amount of the burner.

With this configuration, the combustion amount is controlled by operating the proportional control valve with one proportional control valve drive unit, and the temperature of each hot water is proportionally controlled by the signals from the hot water supply thermistor and the heating thermistor. This allows you to keep the water temperature stable.

However, by making the number of parts and circuits common, the cost can be reduced and one purpose can be achieved.Description of an Embodiment Below, an embodiment of the present invention will be described based on the drawings. It is a configuration outline diagram.

Reference numeral 1 denotes a heat exchanger for hot water supply, which is connected to the water supply port 1a and the hot water supply port 1b, and has a water supply detection element 22 in the water supply side passage for detecting water supply and outputting a signal.

2 is a heating heat exchanger which is connected to a hot water return port 2a and a hot water inlet 2b, and is provided with a dimp 3, an expansion tank 4, and a nox pipe 5 in the O heating hot water passage connected to a hot water return port 2a and a hot water inlet 2b; Each of the heat exchangers 1 and 4 has an overflow pipe 6.
．． 2 is connected to an exhaust pipe 7, and is provided with a forced exhaust fan motor 23 having fan blades 24, and configured to discharge combustion exhaust gas to an exhaust port 26 through an exhaust kite 26.

The fuel passage, which is formed in a part of the case 28 so that combustion air can be supplied from the air supply port 27, connects the unified solenoid valve SVo 8 and the proportional control valve 10 in series, and passes it through the hot water supply solenoid valve SVw9. It is connected to the hot water supply burner 11, passed through the heating solenoid valve SVH13, and branched and connected to the heating burner 15.

A comparator 17 compares and calculates a signal from a hot water supply thermistor 16 provided at the outlet of the hot water heat exchanger 1 and a signal from a hot water temperature setting device 18 such as a remote controller, and operates a proportional control valve drive unit 19 to operate the proportional control valve drive unit 19. The control valve 10 is operated and the hot water supply burner 11 is activated.
The hot water temperature is controlled so that the hot water temperature is constant by controlling the amount of combustion of the hot water. The comparator 29 compares and calculates the signals from the heater 30 to operate the proportional control valve drive unit 19, which operates the proportional control valve 1°, controls the combustion amount of the heating burner 15, and supplies hot water for heating. It is configured to control the hot water temperature at a constant level.

The hot water supply solenoid valve 9 and the heating solenoid valve 13 are configured to open when each hot water temperature is controlled.

To explain the operation, when the hot water heater (not shown) connected to the hot water supply port 1b is opened, the water supply detection element 22 detects water supply, and the hot water supply operation sequence is activated (not shown). ) The forced exhaust fan motor 23 rotates. The main solenoid valve 8, the hot water supply solenoid valve 9, and the proportional control valve 10 are opened, and the fuel is ignited.
Let it hold.

(The ignition/holding means is not particularly shown in the drawings.) When the hot water supply burner 11 burns, the hot water supply heat exchanger 1 is heated, and the hot water is discharged from the hot water supply port 1b. The hot water temperature is detected by the hot water supply thermistor 16, and the comparator 17 operates the proportional control valve drive unit 19 so that the hot water temperature becomes the hot water temperature set by the hot water temperature setting device 18, and operates the proportional control valve 1o.
The combustion amount of the hot water supply burner 11 is controlled.

On the other hand, one heating hot water passage has a hot water spout 2b and a hot water return port 2a.
A radiator for heating and a heat exchanger (not shown) for reheating the bath by heating hot water are connected to the tip of the tube.

One person is responsible for switching the heating operation signal, etc. (not shown).
When this happens, the pump 3 and forced exhaust fan motor 23 rotate.

Open the main solenoid valve 8, the heating solenoid valve 13, and the proportional control valve 1° to ignite and hold the fuel. (The ignition/holding means is not particularly shown.) By the heating burner 15 burning, the heating heat exchanger 2 is heated, and hot water is circulated and supplied to a heating radiator etc. through the hot water spout 2b.

The temperature of the circulating hot water is detected by the heating therister 20, and the comparator 29 operates the proportional control valve drive unit to operate the proportional control valve 1o so that the hot water temperature reaches the temperature set by the hot water temperature setting device 30. , controls the combustion amount of the heating burner 15.

In order to switch between the hot water supply solenoid valve 9 and the heating solenoid valve 13, the signal of the water supply detection element 22 is changed to the reno switching method, and when the water supply detection element 22 operates, the hot water supply solenoid valve 9 is opened and the heating solenoid valve 13 is switched. The valve is configured to close the valve.

The proportional control valve 10 has a pressure control valve section using a diaphragm, and a type that controls pressure by electromagnetic force is effective in this embodiment.

It is effective to make the comparators 17 and 29 the same, and to make the hot water supply thermistor 16 and the heating thermistor 20 the same constant number.

Effects of the Invention As described above, in the present invention, the hot water supply burner 11 and the heating burner 15 are provided branching off from the proportional control valve 1o, and the hot water temperature of each heat exchanger is controlled by one proportional control valve driving section 19. can do.

(1) Both hot water supply and heating use a single proportional control valve to control the combustion amount and hot water temperature, so the hot water temperature can be stabilized. Energy saving can be achieved compared to hot water temperature control using Hi-Lo-OF control.

(3) Since the number of parts in the fuel passage is small and only one hot water temperature control circuit is required, costs are reduced.

(4) The system price as an equipment product such as a hot water heater is low, so the practical effect is extremely large.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram of the configuration of a conventional example, and FIG. 2 is a schematic diagram of the configuration of an embodiment of the present invention.

Claims (1)

[Claims] It has two heat exchangers, one of which is configured as an instantaneous water heater for hot water supply (the other is configured as an instantaneous water heater that circulates hot water with a pump for reheating, and one for heating, and the other is configured for heating and heating). A solenoid valve and a proportional control valve are connected in series, and a solenoid valve for hot water supply and a solenoid valve for heating are branched to each of the burners facing the heat exchanger of the water heater, and an outlet of the heat exchanger for hot water supply is provided. The signals from the hot water supply thermistor installed at the outlet of the heating heat exchanger and the heating thermistor installed at the outlet of the heating heat exchanger are connected to one proportional control valve drive section through each comparator, and the signal from the proportional control valve drive section is used to control the proportional control valve drive section. A hot water temperature control device for a 2-can, 2-water type hot water heater configured to drive a control valve to control the combustion amount of the burner.