JPS5916734Y2 - heating system - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a heating system that heats a room by circulating hot water and radiating the heat of the hot water from a radiator installed indoors.

In the conventional heating system of this kind, the heating capacity is influenced by the amount of circulating water, and the heating capacity is largely dependent on the amount of circulating water.

Therefore, the typical hot water temperature during heating (75°C to 85°C
), it is necessary to secure a fairly large amount of circulating water.

Therefore, there is a problem in that the entire system including the circulation pump, the distillation tank, and the pipes becomes large.

Although miniaturization of this type of heating system can be achieved by reducing the amount of circulating water, it is necessary to devise ways to increase the difference in hot water temperature between the outlet and inlet of the heating section.

However, if we increase the difference in water temperature in the heating section,
If the heat dissipation from the radiator is insufficient, the temperature of the water after leaving the heating section will rise more than necessary, which will turn into steam at the inlet of the distillation tank and escape from the circulation system, resulting in serious problems such as a decrease in water volume. There's a problem.

The present invention aims to solve the above-mentioned problems by providing a compact low-flow heating system that enables heating with low flow rates without reducing the amount of water.

Next, the configuration of the present invention will be specifically explained based on an embodiment shown in the drawings.

The low-flow heating system as an application example of the present invention shown in the drawing includes a boiler unit B in which a heating section 1, a distillation tank 2, and a circulation pump 3 are connected to each other by a pipe, and a pipe connected to the boiler unit B. It consists of an indoor heating unit (H) that serves as a radiator and is connected by a radiator.

The heating section 1 is a local heating system that performs large input heating on a small area, which is composed of a boiler heat exchanger 4 and a burner 5 that heats the boiler heat exchanger 4.

The heating section 1 in the boiler unit may be of a so-called pot type which has a large heat exchange area, but the former is more convenient because it can make the system more compact and shorten the start-up time at the start of heating.

As is well known, the distillation tank 2 is used to ensure a constant amount of water in the circulation system, and is connected to the outlet side of the boiler heat exchanger 4 through a pipe line 6, and is connected to the boiler heat exchanger 4 to receive hot water from the boiler heat exchanger 4. is introduced through this conduit 6.

Another pipe line 7 is connected to the distern tank 2, and a circulation pump 3 is connected to a part of this pipe line 7.

The indoor unit) H has its supply side pipe connected to the rear end of the circulation pump 3 in the pipe line 7 of the distern tank 2, and its return side pipe connected to the inlet side end of the boiler heat exchanger 4. The boiler units 1-B are connected to each other to receive hot water from the boiler units 1-B.

Note that the symbol W in the figure is the wall of the chamber.

In the above configuration, in heating operation during steady load state,
The hot water heated to about 75°C in the heating section 1 is introduced into the di-stern tank 2 through the pipe 6, and further passed from the di-stern tank 2 through the pipe 7 by the circulation pump 3.
The heat is sent to the indoor unit) H, where it radiates heat into the room, and returns to the heating section 1 again, undergoing a series of circulations.

That is, the hot water is constantly circulated by being supplied with heat in the heating section 1 by the amount of heat radiated by the indoor unit t-H.

The stability of the heating operation during this steady load state is ensured by the hot water temperature regulator 8 for use during steady load conditions, which is installed immediately after the circulation pump 3 of boiler unit (B).

This hot water temperature regulator 8 is set at 75°, which is the hot water temperature during normal heating.
As shown in the drawing, it is connected to the pipe line 7 on the outlet side of the distiller tank 2, but as a result, the hot water temperature on the outlet side of the boiler heat exchanger 4 Configure settings.

That is, if the hot water that has passed through the heating section 1, the distillation tank 2, and the circulation pump 3 and reaches the hot water temperature regulator 8 exceeds the hot water temperature during normal heating, the hot water temperature regulator 8 The conduit 6 in that section is closed.

Note that the closing operation of the hot water temperature regulator 8 is linked to the extinguishing operation of the burner 5 of the heating section 1.

By providing the hot water temperature regulator 8 for use during a steady load, stability during normal heating operation is maintained, but if the amount of heat dissipated by the indoor unit H decreases (weak (heating, ie, during light load), the water temperature on the inlet side of the boiler heat exchanger 4 becomes higher than normal.

Therefore, the hot water exiting the boiler heat exchanger 4 has a temperature higher than the appropriate heating temperature.

When such high-temperature hot water is sent to the di-stern tank 2, it becomes steam in the di-stern tank 2 and escapes from the circulation system.

Such inconveniences can be solved by the hot water temperature regulator 9 for use during light loads, which is interposed in the pipe line 6 between the boiler heat exchanger 4 and the distillation tank 2.

That is, in this water temperature regulator 9, there is little heat radiation in the indoor unit 1-H, so that the hot water that has passed through the heating section 1 is heated to 85°C.
If the temperature exceeds that level, the pipe line 6 is closed and the distern tank 2 is closed.
The supply of high-temperature hot water to the area will be stopped.

The opening/closing operation of the pipe line 6 of the hot water temperature regulator 9 is configured to be linked with the on/off operation of the ignition/extinguishing of the burner 5 of the heating section 1, thereby suppressing excessive heating. .

As described above, in this embodiment, it is possible to control the hot water temperature with high accuracy using the two hot water temperature regulators 8.9.

This prevents water loss due to unnecessary heating even at low flow rates, making it possible to construct a sufficiently compact heating system.

By controlling the burner 5 on and off in conjunction with the hot water temperature regulators 8 and 9, it is possible to vary the heat dissipation capacity for heating while keeping the thermal power of the burner 5 constant. In this burner 5, input control can be realized with a simple configuration.

Note that the circulation pump 3 may be configured in conjunction with the operation of the hot water temperature regulator 8.9, or may be configured independently.

However, even a single hot water temperature regulator 9 can overcome the problem of water volume loss due to overheating in this type of system.

In other words, since it is sufficient to stop the supply of high-temperature water to the distillation tank 2, it is sufficient to monitor the water temperature on either the outlet side or the inlet side of the heating section 1.

However, when the hot water temperature regulator 9 is installed on the inlet side of the heating section 1, its operating point is set to, for example, (85-T)'C, assuming that it closes at 85°C as in the previous example.

Note that T is the temperature increase due to heat supplied by the heating section 1.

As explained above, according to this invention, the introduction of hot water at a temperature higher than the allowable hot water temperature into the distillation tank can be regulated in advance by the hot water temperature adjustment member, thereby reducing restrictions on the heating section (hot water temperature). This solves the problem of water loss in the distillation tank due to the need to increase the temperature difference, and further reduces the amount of circulating water.

Furthermore, since the hot water is controlled by two hot water temperature adjusting members, highly accurate temperature control is possible.

Therefore, it is possible to reliably realize low flow rate circulation, which has the effect of making the entire system more compact, eliminating the complexity of piping work and construction work, and reducing maintenance costs.

[Brief explanation of the drawing]

The drawing is a system diagram showing the entire low flow heating system as an application example of the present invention. 1...Heating section, 2...DiStern tank, 3...Circulation pump, 4...Boiler heat exchanger, 5... ...burner, 6,7...
...Pipeline, 8,9...Hot water temperature regulator, B...
...boiler unit, H...indoor unit.

Claims (1)

[Scope of utility model registration request] It consists of a boiler unit in which a heating section, a distillation tank, and a circulation pump are connected to each other by a pipe line, and an indoor unit connected to this and serving as a radiator that receives hot water supply. When the temperature of the hot water flowing through the pipe reaches a set value or higher, the hot water temperature adjusting member closes the pipe and stops supplying hot water to the di-stern tank. and a heating system provided in a connecting pipe line between the distern tank and the radiator, respectively.