JP2003222344A - Heating system with hot water - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a heating system with hot water in which air bleeding from piping, etc., after the installing works can be conducted even by an unskilled worker and which assures good workability. <P>SOLUTION: The heating system 10 with hot water comprises a reserve tank 11 to reserve the circulating water, a circulating pump 12 whose suction side is coupled with the reserve tank 11, a heat exchanger 13 connected with the discharge side of the pump 12 for heating the water fed by a heat source, radiation parts 14 and 15 whereto the hot water heated by the heat exchanger 13 is supplied, and a control device 16 for them, wherein the operation includes an initial operation mode to expel the air from the piping passages in which the control device 16 puts the pump 12 in continuous operation in the initial period, and with an elapse of the time, changes over into the intermittent operation in which the pump 12 is turned on and off. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hot water heating system that uses water (including water containing antifreeze liquid, etc., hereinafter), and in particular to piping and pipes at the completion of inspection or installation of equipment drained of water. The present invention relates to a hot water heating system equipped with a program for actively bleeding air in the equipment.

[0002]

2. Description of the Related Art A hot water heating system is newly installed,
Or, if the water in the system is drained, it is necessary to drain the air in the pipes and equipment.While supplying water to the reserve tank or after, press the test operation switch provided on the operation panel to turn on the circulation pump. Forced operation was performed, water was sent to the piping and equipment, and the air in the piping was removed.

[0003]

However, if the piping system including the heating piping and the boiler piping is complicated, it is difficult to completely remove the air in the piping and the equipment only by the forced operation of the circulation pump. There were the following problems. (1) If air remains inside the piping or equipment, there is a concern that the pump will run dry, noise will be generated due to this, and that the heat exchanger will be empty. (2) Even if a skilled worker appropriately turns on and off the circulation pump manually, the skilled worker cannot leave the place, and there is a problem that workability is extremely poor. (3) Furthermore, if the work of injecting water into the circulation tank is performed while manually turning on and off the circulation pump, there is a problem that it takes time to inject water. The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a hot water heating system that can perform air bleeding for piping and the like after installation work even if it is not a skilled worker, and also has good workability. .

[0004]

A hot water heating system according to the present invention, which meets the above-mentioned object, includes a circulation pump for circulating water in a heating circuit (ie, a heat radiating portion), a heat exchanger for heating the circulating water, In the hot water heating system having these control devices, the control device causes the circulation pump to be in continuous operation at the initial stage of operation, and switches to intermittent operation in which the circulation pump is turned on and off with the passage of time, and the air in the piping path is changed. There is an initial operation mode to drive out. As a result, by turning on the switch of the initial operation mode, the hot water heating system enters the initial operation mode, the circulation pump is continuously operated in the initial operation, and the circulation pump is turned on and off over time. By switching to operation, the air in the piping path can be effectively expelled.

In the hot water heating system of the present invention, it is preferable that during the intermittent operation in the initial operation mode, the on time and / or the off time of the circulation pump is changed with the passage of time. As a result, the on / off time of the circulation pump can be appropriately selected, and more efficient work can be performed by bleeding air from the piping and equipment. Further, in the hot water heating system of the present invention, the continuous operation of the circulation pump at the beginning of the operation is a continuous operation of 10 to 30 minutes, and the intermittent operation of turning on and off the circulation pump thereafter is 2 to
More preferably, the on-time is longer than or equal to the off-time, which consists of a combination of an on-time of 4 seconds and an off-time of 1 to 3 seconds. Then, in the hot water heating system of the present invention, it is preferable that the initial operation mode is automatically canceled when a preset time has elapsed after the start of operation. As a result, the normal operation is automatically started when the air is exhausted, and normal hot water heating is performed.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION Next, referring to the attached drawings, an embodiment in which the present invention is embodied will be described to provide an understanding of the present invention. Here, FIG. 1 is a water system diagram of a hot water heating system according to an embodiment of the present invention, FIG. 2 is a block diagram of a controller of the hot water heating system, and FIG. 3 is a flow of an initial operation mode of the hot water heating system. It is a figure.

As shown in FIG. 1, a hot water heating system 10 according to an embodiment of the present invention includes a reserve tank 11 for storing circulating water (including water containing an antifreeze liquid, pure water, tap water, etc.). Circulation pump 12 whose water absorption side is connected to reserve tank 11, heat exchanger 13 which is connected to the discharge side of circulation pump 12, and heat radiation which is an example of a heating circuit to which hot water heated by heat exchanger 13 is supplied. Parts 14, 15
And these control devices 16. These will be described in detail below. The reserve tank 11 is a container for temporarily storing water used in the hot water heating system 10, and has a circulating water inlet 17 and an outlet 18 at the bottom. A water level detector 19 for detecting the upper limit position and the lower limit position of the internal liquid surface is provided. Reserve tank 1
The circulation pump 12 connected to the one outlet 18 has sufficient capacity to pump water into the system, the discharge side of which is connected to the heat exchanger 13.

The heat exchanger 13 has a burner 20 using a fuel such as gas or kerosene in the lower part, and heats water passing therethrough. A temperature sensor 21 is provided on the downstream side of the heat exchanger 13, and the combustion state of the burner 20 is adjusted by the control device 16 while measuring the temperature of water (hot water) discharged from the heat exchanger 13. The heat exchanger 13 is provided with a bypass line 22 for supplying water to the heat exchanger 13 and the heat exchanger 1.
3 determines the proportion of water that does not pass through, heats part of the water that passes through, and disposes the valve 1 in the heat radiating portions 14 and 15 used for heating.
The temperature of the water sent via 4a and 15a is, for example, 40 to 70.
It is adjusted so that the temperature range is ℃. In this embodiment, two heat radiation parts 14 and 15 are provided, but these are usually arranged in different rooms to heat each room. The heat dissipating parts 14 and 15 are 2 in this embodiment.
Two are connected in parallel, but there may be one or more than two. The water that has passed through the heat radiating parts 14 and 15 is returned to the reserve tank 11. In addition, 23 shows a heat source device.

As shown in FIG. 2A, the controller 16
Has a central processing unit (CPU) 24, a memory 25, an input circuit 27, an output circuit 28, and a microcomputer 30 having an A / D converter 29, and first to fourth drive circuits 31 to 34. . The circulation pump 12 is provided in the first drive circuit 31.
However, the second drive circuit 32 has a blower 35 for supplying air to the burner 20, and the third drive circuit 33 has a blower 20.
Of the burner 2 in the fourth drive circuit 34.
Fuel supply devices 37 to 0 are connected to each other, and a command signal is sent from the central processing unit 24 through the output circuit 28. On the other hand, the input circuit 27 includes a trial run switch 38, a remote controller 39 for performing normal control of the hot water heating system 10,
Signals from the flame detection device 40 that detects the combustion state of the burner 20 and the water level detector 19 are input. A signal from the temperature sensor 21 that measures the temperature of the hot water immediately after leaving the heat exchanger 13 is input to the input circuit 27 via the A / D converter 29.

As shown in FIG. 2B, a program is written in the central processing unit 24 including the memory 25, and well-known time measuring means 41, water temperature determining means 42, burner operating means 43, burner stopping means. 44, a circulation pump operation determination means 45, a circulation pump operation means 46, and a circulation pump stop means 47 are configured, and the remote controller 39 is used during normal operation.
By operating the (switch), the circulation pump 12 is driven, and the water sent from the circulation pump 12 is heated by the heat exchanger 13 equipped with the burner 20 and supplied to the heat radiating portions 14 and 15. Then, according to a command from the remote controller 39, the temperature of the circulating water is adjusted and the hot water heating system 10 as a whole is turned on and off.

Since the normal operation of the hot water heating system 10 is well known as described above, a detailed description thereof will be omitted, and an initial operation mode immediately after the installation of the hot water heating system 10 will be described with reference to FIG. In FIG.
After the hot water heating system 10 is installed and the power is turned on, the test operation switch 38 provided in the heat source device 23 is turned on (step S1). This makes the trial run switch 3
It is determined whether or not 8 is turned on for the first time (step S
2) If yes, various timers are initialized (step S3) and the continuous operation of the circulation pump 12 is performed. First, it is determined whether the continuous operation time of the circulation pump 12 has elapsed (step S4). ), The continuous operation of the circulation pump 12 is executed (step S5), and the process returns to the beginning (step S1). When returning to the beginning, since the test operation switch 38 is not pressed, it should not be turned on, and it jumps to step S4 to determine whether or not the continuous operation time is completed.

In this embodiment, since the continuous operation time of the circulation pump 12 is set to 15 minutes, when the time elapses, the first intermittent operation mode of the circulation pump 12 is entered through step S6 ( Step S7). In this first intermittent operation mode, the circulation pump 12 is operated at a timing of 2 seconds on and 1 second off. Then, in step S6, the first
When the intermittent operation mode of is completed (about 15 minutes), the second intermittent operation mode is entered (step S8, step S
9). In the second intermittent operation mode, the circulation pump 12 is operated for 15 minutes at a timing of 2 seconds on and 2 seconds off. When the second intermittent operation mode ends, the third intermittent operation mode is entered (step S10, step S11). In the third intermittent operation mode, the circulation pump 12 is turned on for 3 seconds and turned off for 3 seconds for 15 minutes. As a result, the air in the piping and the equipment escapes, so that it is confirmed in step S10 that the third intermittent operation mode has been completed, and the circulation pump 12 is stopped (step S12). As a result, the initial operation mode is released at the preset time. In addition, the time and the distribution of the time are the size of the hot water heating system 10,
The optimum setting was made in consideration of the pipe diameter and overall length.

As described above, when the circulation pump 12 is operated, water flows through the pipes and the equipment. However, if there is air in the middle, a water passage is formed with the air remaining in part, and the circulation pump 12 is operated. Even with continuous operation, the air inside cannot be completely removed. Therefore, when the circulation pump 12 is stopped, the water moves downward and the air moves upward due to the height difference between the pipe and the equipment. Next, when the operation is restarted, the air is pushed by the water and moves to the downstream side, but the air also accumulates on the downstream side to form a water passage in a part thereof. Therefore, when the work of dividing the water into the lower part and the air into the upper part is performed by stopping the circulation pump 12, the air moves further to the downstream side. By repeating such work, the air accumulated in the pipe and the equipment can be discharged. It has been confirmed that, in the intermittent operation mode, the on / off time cycle is short at the initial stage, and the air can be deflated efficiently by gradually increasing the on / off time cycle. In addition,
If the water in the reserve tank 11 decreases during the initial operation,
The water level detector 19 is activated to give an alarm, and then the circulation pump 12 is stopped, so that the reserve tank 11 is manually or automatically supplied with water. In this case, it is not necessary when the capacity of the reserve tank 11 is sufficiently large.

In this embodiment, the heat dissipation portion 14,
15 are used in parallel, but at the same level (eg
If it is on the same floor) and the above operation is performed, both heat radiation parts 1
The valves 14a and 15a can be omitted because the water levels of 4 and 15 come to coincide with each other, and the operation of the circulation pump 12 causes the water level to further increase. When the levels of the heat radiating parts 14 and 15 are different, the valves 14a and 15a are provided respectively, and the valves 14a and 15a are alternated during the initial operation or when the next initial operation is performed after the first initial operation is completed. By opening and closing, the water is made to flow to either one of the heat radiating portions 14 and 15, and then the water is made to flow to the other, whereby the internal air can be completely discharged.

Further, the circulation pump 12 and the reserve tank 1
When the equipment such as the heat radiating parts 14 and 15 is located higher than the position 1, it is difficult to bleed air in the pipes and equipment that are in the upper position. It will be necessary to install a valve or to use a circulation pump with higher power. Therefore, when the capacity of the circulation pump is sufficient, the entire hot water heating system 10 can be deaerated based on the flow shown in FIG.
It should be noted that the present invention is not limited to the above-described embodiments, and improvements and modifications within the scope of the present invention are also included in the present invention. In particular, the continuous operation and the intermittent operation of the circulation pump are specifically described using time, but the present invention is not limited to these numbers.

[0016]

As is apparent from the above description, in the hot water heating system according to the first to fourth aspects of the present invention, the control device causes the circulation pump to be continuously operated at the initial stage of operation, and the circulation pump is changed over time. Since the initial operation mode in which the air in the pipe path is expelled is provided by switching to the on / off intermittent operation, the air in the pipe and the equipment can be automatically evacuated in a relatively short time. Moreover, a skilled worker as in the prior art is not required, and the hot water heating system can be deflated while performing other work. Particularly, in the hot water heating system according to claims 2 and 3, during the intermittent operation in the initial operation mode, the on time and / or the off time of the circulation pump are changed with the passage of time. The movement of the air accumulated in the equipment is not specified and is not accumulated in one place, and the air can be evacuated more efficiently. Then, in the hot water heating system according to the fourth aspect, the initial operation mode is automatically released after a preset time has elapsed after the start of operation, so that the operation is performed only when necessary.

[Brief description of drawings]

FIG. 1 is a water system diagram of a hot water heating system according to an embodiment of the present invention.

FIG. 2 is a block diagram of a control device of the hot water heating system.

FIG. 3 is a flowchart of an initial operation mode of the hot water heating system.

[Explanation of symbols]

10: Hot water heating system, 11: Reserve tank, 1
2: Circulation pump, 13: Heat exchanger, 14, 15: Heat dissipation part, 14a, 15a: Valve, 16: Control device, 17:
Inlet, 18: Outlet, 19: Water level detector, 20: Burner, 21: Temperature sensor, 22: Bypass line, 2
3: heat source device, 24: central processing unit, 25: memory, 2
7: input circuit, 28: output circuit, 29: A / D converter,
30: microcomputer, 31: first drive circuit, 32: second drive circuit, 33: third drive circuit, 34: fourth drive circuit, 35: blower, 36: ignition device, 37: fuel supply device , 38: test operation switch, 39: remote controller, 40: flame detection device, 41: timing means, 42: water temperature detection means, 4
3: burner operating means, 44: burner stopping means, 4
5: Circulation pump operation determination means, 46: Circulation pump operation means, 47: Circulation pump stop means

Claims (4)

[Claims] 1. A hot water heating system having a circulation pump for circulating water in a heating circuit, a heat exchanger for heating the circulating water, and a control device for these devices, wherein the control device causes the circulation pump to operate at an initial stage of operation. Is a continuous operation, and is switched to an intermittent operation in which the circulation pump is turned on and off with the lapse of time to provide an initial operation mode for expelling the air in the piping path. 2. The hot water heating system according to claim 1, wherein during the intermittent operation in the initial operation mode, the on time and / or the off time of the circulation pump is changed with the passage of time. Hot water heating system. 3. The hot water heating system according to claim 2, wherein the continuous operation of the circulation pump in the initial operation is 10 to 3
It is a continuous operation for 0 minutes, and the intermittent operation for turning on and off the circulation pump thereafter is composed of a combination of an on time of 2 to 4 seconds and an off time of 1 to 3 seconds, and the on time is longer than the off time. Hot water heating system characterized by being long or identical. 4. The hot water heating system according to claim 1, wherein the initial operation mode is automatically released after a preset time has elapsed after the start of operation. And hot water heating system.