JP2002364862A - Hot water type heating system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a hot water type heating system in which a display of a water supply operation is carried out when a mode is shifted to a water supply mode during an ordinary operation so that a user can safely use the system. SOLUTION: When one water level electrode 16 detects a level not higher than a lower level (dry), the mode shifts to the water supply mode and a microcomputer 31 operates a water injection solenoid valve 18 connected to a city water pipe to supply water to a hot water tank 4 through a pipeline 19. In the water supply mode, the microcomputer 31 controls to display the indication of 'water supplying' by using the display parts of a second figure (second order) and a third figure (third order). That is, in the display of 'water supplying', the display is changed in such a way that the lowermost segment of the display parts of the second figure and the third figures is lighted, then, the lowermost and an intermediate segments are lighted, then, the lowermost, the intermediate and the uppermost segments are lighted, then, all the segments are turned off, and then, the lowermost segment is lighted again.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a replenishing device for supplying hot water in a hot water tank from a heat source device to each terminal equipment and for replenishing when a decrease in the hot water in the hot water tank is detected by a water level detection sensor. The present invention relates to a hot water type heating system in which tap water is supplied by opening a water injection valve.

[0002]

2. Description of the Related Art In a conventional hot water heating system in which hot water in a hot water tank is supplied to each terminal device from a heat source unit, a function of supplying tap water to the hot water tank is as follows. There are a type that automatically performs a replenishing operation when the amount of hot water decreases, and a type that performs a water refilling operation (supplying operation) forcibly by a watering execution switch during maintenance.

[0003]

However, in the replenishment operation performed when the amount of hot water for heating is reduced during the normal operation, the display of water filling is not particularly indicated. Then, when the water filling is performed during the normal operation, the water filling operation is continued even if the operation signal is turned off. For this reason, a state occurs in which the device is operating even if the operation signal is turned off, but there is a problem that the reason for the operation cannot be understood because there is no display. Also, if the operation is performed while the hot water is reduced, the combustion is prohibited and the operation is performed until the tap water replenishment operation is completed.
At first glance, it may be mistaken for a failure because there is no display.

Therefore, according to the present invention, when the mode is shifted to the water filling mode during the normal operation, an indication that the water filling is being made is displayed.
It is an object of the present invention to provide a hot water heating system that can be used by a user with peace of mind.

[0005]

Means for Solving the Problems For this reason, the first invention provides
The hot water in the hot water tank is supplied to each terminal device from the heat source device, and when the water level detection sensor detects that the hot water in the hot water tank has decreased, the tap water for replenishment is opened to supply tap water. In the hot water heating system configured as described above, a display unit for displaying that the water is being filled when the mode is shifted to the water filled mode during the normal operation is provided.

According to a second aspect of the present invention, hot water in a hot water tank is supplied from a heat source unit to each terminal device, and when a decrease in the hot water in the hot water tank is detected by a water level detection sensor, water is supplied for replenishment. In a hot water heating system in which tap water is replenished by opening a valve, a display unit is provided for displaying a water level state in the hot water tank based on the water level detection sensor when the mode shifts to a water filling mode during normal operation. It is characterized by having.

In a third aspect of the present invention, hot water in a hot water tank is supplied from a heat source device to each terminal device, and when a decrease in the hot water in the hot water tank is detected by a water level detection sensor, water is supplied for replenishment. In a hot water heating system that replenishes tap water by opening a valve,
In order to indicate that the vehicle is being filled with water when the mode is shifted to the water filled mode during normal operation, a display unit that changes the display by blinking is provided.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. First, in FIG. 1, reference numeral 1 denotes a heat source unit for supplying hot water, and this heat source unit 1 is used for low-temperature heating as a terminal device (for example, hot water of 60 ° C. is supplied).
And a hot water air conditioner 3 for high-temperature heating (for example, hot water of 80 ° C. is supplied), and the heat source unit 1 supplies hot water to these for heating. .

The heat source unit 1 is provided with a hot water tank 4 for storing hot water, and a hot water circulation pump 6 is connected to the hot water tank 4 via a pipe 5. A heat exchanger 8 is connected via a pipe 7.
The heat exchanger 8 is provided with a gas burner (combustor) 9, and the heat of combustion by the gas burner 9 heats hot water in the finned pipe 10 in the heat exchanger 8.

The heat exchanger 8 is connected to the hot water air conditioner 3 having a high-temperature load via a pipe 11. The pipe 11 is connected to a bypass pipe 12 for returning a part of the hot water heated by the heat exchanger 8 to the hot water tank 4. The bypass pipe 12 is connected to a pipe 13. 1
3 is connected to the hot water tank 4.

A pipe 7 on the outlet side of the hot water circulation pump 6
Is connected to a hot water control valve (electrically operated valve) 15 via a pipe line 14. The hot water control valve 15 is connected to the hot water floor mat 2 as a low-temperature side load.

Water level electrodes 16 and 17 are provided in the hot water tank 4 as water level detecting sensors. When one of the water level electrodes 16 detects a lower level, that is, when a shortage of the hot water tank 4 is detected, a water pipe is provided. Water injection solenoid valve 18 connected to
Is operated to supply water to the hot water tank 4 via the pipe 19. That is, when the hot water in the hot water tank 4 decreases during the normal operation of the equipment, the replenishment operation (water filling) is automatically performed.

The heat source unit 1 includes a low-temperature heating control thermistor (temperature sensor) 20 for measuring the temperature of hot water during low-temperature heating, and a high-temperature heating control thermistor for measuring hot water temperature during high-temperature heating. (Temperature sensor) 21 are provided. The thermistor 20 for low-temperature heating control is provided in the pipeline 7 on the outlet side of the hot-water circulation pump 6, for example, at 60 ° C.
Detects the temperature of low-temperature hot water. This low-temperature hot water is drawn from the hot water tank 4 via the hot water circulation pump 6,
The water is returned to the hot water tank 4 via the pipe 13 through the pipe 14 and the hot water floor mat 2 without passing through the heat exchanger 8. The thermistor 21 for high-temperature heating control is provided in the conduit 11 on the outlet side of the heat exchanger 8 and detects a high-temperature hot water temperature of, for example, 80 ° C. The high-temperature hot water is heated through the heat exchanger 8 and then passes through the pipe 11 and the hot water
3 and is returned to the hot water tank 4.

The gas burner 9 is supplied with fuel via a fuel line 25. A gas proportional valve 26, a gas solenoid valve 27, a source gas solenoid valve 28, and the like are connected to the fuel line 25, and these are connected to a microcomputer 31 (hereinafter, referred to as a microcomputer) mounted on a control board 30.
The valve opening is controlled by a command from the microcomputer 31.

Reference numeral 40 denotes a remote controller (hereinafter, referred to as a remote controller), which is connected to the control board 30 in the electrical box and remotely controls the combustion operation or stop of the equipment. A remote controller 40 is provided with a room temperature sensor 41,
The sensor 41 is connected to the microcomputer 31 mounted on the control board 30.

Next, the control block diagram of FIG. 2 will be described. A watering execution switch 52 for forcibly operating the water injection electromagnetic valve 18 to supply water to the hot water tank 4 via the pipe line 19 is provided on an operation unit provided on the side of the body of the heat source unit 1. , And the microcomputer 31. The microcomputer 31 has water level electrodes 16 and 17 disposed in the hot water tank 4, a low temperature heating control thermistor 20 for measuring the temperature of the hot water at the time of heating, and measuring the temperature of the hot water at the time of high temperature heating. Thermistor 2 for controlling high temperature heating
1. A room temperature sensor 41 and the like are connected. Also, 55
Is a three-digit liquid crystal display section composed of 7 segments, which is provided on the side surface of the body and is connected to the microcomputer 31 to indicate "Water is being filled" to give a sense of security to the user. is there.

The microcomputer 31 is connected to the hot water circulation pump 6, the hot water control valve 15, the water injection solenoid valve 18, the gas proportional valve 26, the gas solenoid valve 27, and the original gas solenoid valve 28.

The operation of the above configuration will be described below. When the operation is started by operating the remote controller (not shown) of the hot-water floor mat 2 or the hot-water air conditioner 3 in a state where the power source is turned on, the combustion is performed by the gas burner 9 and the hot-water circulation pump 6 is turned on. Operate.

Therefore, the water in the hot water tank 4 is guided into the heat exchanger 8 through the pipe 7, and the hot water in the finned pipe 10 in the heat exchanger 8 is heated by the heat of combustion by the gas burner 9. The hot water supplied to the hot water air conditioner 3 through the pipe 11 and blows out the warm air into the room to be used for heating, and the hot water subjected to heat exchange returns to the hot water tank 4 through the pipe 13. Further, the hot water mat 4 is drawn out of the hot water tank 4 through the hot water circulation pump 6 and does not pass through the heat exchanger 8 but through the pipe 14.
The floor is heated by supplying hot water to the hot water, and the hot water subjected to heat exchange returns to the hot water tank 4 via the pipe 13.

The normal heating operation is performed as described above. The case where the hot water in the hot water tank 4 decreases during the operation to enter the water filling mode will be described with reference to FIGS. In this case, when one of the water level electrodes 16 detects a level lower than (low water level), a water filling mode is set. In the water filling mode, the microcomputer 31 operates the water injection electromagnetic valve 18 connected to the water pipe to supply water to the hot water tank 4 via the pipe 19.

Before entering the water filling mode, all three digits of the liquid crystal display 55 were turned off. However, in the water filling mode, the microcomputer 31 displays the second digit (ten's place) and the third digit (hundreds place). ) Is controlled so as to display "water filling" by using the display section of (2). In other words, this indication of "under water"
As shown in FIG. 5, the bottom segment of the display unit of the second and third digits is turned on, then the bottom and middle segments are turned on, and then the bottom, middle and top segments are turned on. Then, the display is changed every second, for example, by turning off all lights, then returning to light the lowest segment, and so on.

Accordingly, the user can understand from the change in the display that the water filling is currently performed, and
It can be used with confidence.

At this time, the microcomputer 31 grasps the state of the water level electrodes 16 and 17 and controls the liquid crystal display 55 as follows. That is, it is determined whether or not both the water level electrodes 16 and 17 detect the absence of water in the hot water tank 4. If both the water level electrodes 16 and 17 detect the absence of water, the display unit of the first digit (ones digit) is displayed. Turn on the bottom segment of the ("drought"
), When the presence of water is detected, the bottom, middle and uppermost segments of the display unit of the first digit (ones digit) are turned on (meaning "full"), and the water level electrode 16 is turned on. When the presence of water is detected and the water level electrode 17 detects the absence of water, the lowermost and middle segments of the display unit of the first digit (ones digit) are turned on (meaning "intermediate water level").

As described above, the microcomputer 31 controls the water injection solenoid valve 1 based on the detection outputs of the water level electrodes 16 and 17.
8 and the liquid crystal display unit 55. The water injection solenoid valve 18 stops operating when the water level electrode 17 detects warm water when the water level reaches the full level. Accordingly, when the operation of the water injection electromagnetic valve 18 is stopped, the water filling mode is stopped, and the normal operation mode is set.

In this embodiment, one of the water level electrodes 16
Is set to a water filling mode to control the liquid crystal display unit 55 when detecting a level lower than the lower (drought) level.
The configuration is not limited to this, and the liquid crystal display unit 55 may be controlled even when the water filling switch 52 is operated by the user. When the water filling switch 52 is operated by the user, the user does not need to display it on the liquid crystal display unit 55 so that the user can understand that the water filling operation is performed. This is because it can be understood that the operation is performed.

Although the embodiments of the present invention have been described above, various alternatives, modifications or variations are possible for those skilled in the art based on the above description, and the various alternatives described above may be used without departing from the spirit of the present invention. It is intended to cover examples, modifications or variations.

[0027]

As described above, the present invention provides a hot-water type heating system that displays that water is being filled when the mode is shifted to the water-filled mode during normal operation, so that the user can use it with peace of mind. can do.

[Brief description of the drawings]

FIG. 1 shows a cross-sectional view of a heat source device.

FIG. 2 is a control block diagram of the present system.

FIG. 3 is an enlarged view of a hot water tank for convenience of explanation.

FIG. 4 is a diagram showing a flowchart of water filling display.

FIG. 5 is an explanatory diagram of a liquid crystal display unit.

[Explanation of symbols]

 1 Heat Source Unit 4 Hot Water Tank 16, 17 Water Level Electrode 18 Water Injection Solenoid Valve 31 Microcomputer 55 Liquid Crystal Display

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Takashi Ando 1F, Otsukicho, Ashikaga-shi, Tochigi Sanyo Electric Air Conditioning Co., Ltd. F-term (reference) 3L070 AA02 AA07 AA09 BB01 DD08 DE09 DF15 DG00

Claims (3)

[Claims] 1. A hot water supply in a hot water tank is supplied from a heat source device to each terminal device, and when a decrease in the hot water in the hot water tank is detected by a water level detection sensor, a water injection valve for replenishment is opened. In a hot water heating system adapted to replenish tap water, a hot water heating system further comprising a display unit for displaying that water is being filled when shifting to a water filling mode during normal operation. 2. A hot water supply in a hot water tank is supplied from a heat source device to each terminal device. When a decrease in the hot water in the hot water tank is detected by a water level detection sensor, a water injection valve for replenishment is opened. In a hot water heating system that replenishes tap water, a display unit that displays a water level condition in the hot water tank based on the water level detection sensor when the mode shifts to a water filling mode during normal operation is provided. Hot water heating system. 3. A hot water supply in a hot water tank is supplied from a heat source device to each terminal device, and when a decrease in the hot water in the hot water tank is detected by a water level detection sensor, a water injection valve for replenishment is opened. In a hot-water heating system configured to replenish tap water, a display unit that changes the display by flashing is provided to indicate that water is being filled when shifting to the water-filled mode during normal operation. Features a hot water heating system.