JPH05157256A - Hot water space heater - Google Patents

Abstract

PURPOSE:To facilitate and expedite a complicated operation with high difficulty by installing a hot water space heater, and then automating a water level retention operation by air venting to a hot water circulation passage only by an operation of an air vent switch. CONSTITUTION:An automatic water level retention controller 34 which receives an ON operation signal of an air vent switch 32 controls to open or close a water supply control valve 12, etc., of a parallel circulation passage 9, etc., having a radiator 15, etc., by a registering order by connection to a connecting terminal strip 36. A variation in a water flow after the air vent is detected by a water flow detector 30, and an end of the air vent is decided by an air vent deciding unit 35. When the air vent of the water supply control valve 39 of a last registration number is ended, it is informed by an air vent end display unit 33.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hot water heater for automatically bleeding a hot water circulation path to fill it with water.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 2, this type of hot water heating apparatus passes water in a water supply tank 41 for separating steam into a heater 43 by a pump 42 and a hot water temperature by a temperature sensor 44. Control the hot water circulation path 46 to the radiator 45 of the terminal.
And a portion of the hot water was bypassed through the bypass circuit 47.

Before the installation work is completed and the operation is started, the pump 42 is operated to discharge the air in the hot water circulation path 46 by the discharge pressure of the pump 42 and replace the water from the water supply tank 41 with the hot water. Preparatory work for filling the circulation path 46 with water was required.

[0004]

However, in the preparatory work described above, the parallel circulation path 48 having the radiator 45 having a particularly large water flow resistance is opened and closed by sequentially opening and closing the water flow control valve 49 to remove air. A high degree of specialized skill was required to determine the degree of omission.

That is, the hot water circulation path 46 and the parallel circulation path 48
Cannot visually confirm the water flow condition from outside the road, and it is difficult to empirically determine the sound of water flow through the road by hearing, which causes problems such as delay in judgment and time consuming. It was

Therefore, the present invention aims at automating the air bleeding of the hot water circulation passage to facilitate and speed up the work.

[0007]

In order to achieve the above object, the means of the hot water heating apparatus according to the present invention comprises a hot water circulation passage for heating the stored water in the water supply tank and sucking / discharging by the circulation pump. A parallel circulation path connected in parallel to the circulation path, which has a radiator for radiating and radiating the circulating hot water and water flow control for adjusting the water flow, an air bleeding switch for instructing the air bleeding of the both circulation paths, and a water flow. An order register that registers the control target when the air is removed in order by electrical connection of the control valve, and a water flow control valve is installed in the hot water circulation path for a predetermined time after opening or where the parallel circulation paths merge. An air bleeding judgment device that determines whether the valve is closed by detecting the water flow of the water flow detector, and an air bleeding judgment valve is closed by opening the water flow control valve in each registration order of the rank registration device based on the operation instruction signal from the air bleeding switch. Closed by a signal, And closing the water flow control valve of the registration order are those having an automatic water Zhang controller outputs a completion signal of the air vent.

[0008]

With the above means, the hot water heating apparatus of the present invention completes the installation work and supplies water to the water tank, and when the air bleeding switch is turned on, the automatic water tension controller drives the circulation pump to activate the order register. Only the water flow control valve in the first registration order is opened. When it receives the valve closing judgment signal of the air bleeding judgment device, it closes, it is registered in the order registration device, and all the water flow control valves installed in the parallel circulation path are controlled to open and close in order, and the last registered communication is performed. Close the water control valve to finish the air bleeding operation,
A completion signal is output to shift from the air bleeding operation sequence to the next operation sequence. In this way, the air bleeding judgment device determines the air bleeding quickly and accurately by the objective and accurate predetermined time of air bleeding based on experimental data and empirical values, or the water flow detection signal of the water flow detector, Subjective and highly variable, relying only on the experience from the outside, and the need for a high degree of expertise can be greatly facilitated. Moreover, the required time can be shortened by the accurate and quick determination of the air bleeding determination device, and the air bleeding operation can be automated by only the operation instruction of the air bleeding switch to improve the work efficiency.

[0009]

Embodiments of the hot water heating apparatus according to the present invention will be described below with reference to the drawings.

FIG. 1 shows an embodiment of the present invention, in which a water supply tank 1 open to the atmosphere, a circulation pump 2 for mechanically circulating hot water, and a heater 3 for heating the circulating hot water are connected in series by piping. The hot water circulation path 4 is provided, and the hot water circulation path 4 is connected to the water supply port 5, the return port 6, and the headers 6 and 7 of the water supply tank 1 (other connection points are omitted). Parallel circulation paths 9, 10 and 11 are connected in parallel to the pipe heads 6 and 7, respectively, and water flow control valves 12 and 13 for controlling the amount of water flow to the upstream side (or the downstream side may be used) of each path 9 and the like. , 14 and radiators 15, 16, 17 arranged in a living room or the like to heat the room by radiating hot water heat.

The water supply tank 1 receives the water supply from a water pipe 20 provided with a water stopcock 19 by controlling the opening and closing of a water supply valve 22 by a water level detector 21. The heater 3 burns the burner 23, detects the temperature of the circulating hot water of the heat exchanger 24 with the temperature sensor 25, and heats it to an appropriate temperature according to the instruction of the controller 27. The hot water circulation path 4 is provided with a bypass path 28 for circulating hot water in parallel with the radiator 15 and the like, and a bypass valve 29 for adjusting the amount of water flow is arranged in the middle. Further, a water flow detector 30 that detects the flow rate of the circulating hot water is provided on the downstream side of the hot water circulation path 4 that is connected to the header 6.

The controller 27 is electrically connected to the water flow detector 30 and the like as shown by a broken line in the figure to transmit and receive signals, and is also connected to the operation panel 31. The operation panel 31 is provided with an air bleeding switch 32, an air bleeding completion indicator 33, and the like. Controller 2
Reference numeral 7 denotes an automatic water tension controller 34 that operates according to an instruction from the air bleeding switch 32, an air bleeding determination device 35 that determines the end of bleeding in the hot water circulation passage 4 and the parallel circulation passage 9, and the water passage control valve 1.
The operation of the apparatus is controlled by including a connection terminal plate 36 and the like as an order registration device that electrically connects the 2 and the like to the connection terminals 37, 38 and 39 individually.

When the apparatus having the above-mentioned structure is installed and inspected, the operator visually confirms the operation and then starts the water filling operation.
Then, when the stop cock 19 is opened and the air bleeding switch 32 is turned on, the automatic water tension controller 34 opens the water supply valve 22 to start water supply to the water supply tank 1 and all the water flow control valves. 12, 13, 14 and the bypass valve 29 are also opened. When the water supply tank 1 rises to the water surface S, the inflow of water supply from the return port 8 to the hot water circulation path 4 starts, and water is supplied from the header 7 and other headers 6 through the bypass passage 28 to the parallel circulation passage 9, 10,
It flows into 11. Then, the air is left in the radiator 15 or the like having the convex pipe portion (not shown), and the water supply tank 1
Then, the water surface reaches the water surface H, and the water supply valve 22 is closed by the detection signal of the water level sensor 21. Upon receipt of this detection signal, the automatic water tension controller 34 closes the bypass valve 29 and instructs the water passage control valve 12 connected to the first connection terminal 37 of the connection terminal plate 36 to continue opening the valve, and to open another passage. Water control valve 13, 14
Instructs the valve to be closed and instructs the operation of the circulation pump 2 to shift from the primary water filling operation to the secondary water filling operation of the parallel circulation path 9 and the like. The bypass valve 29 supplies water to the downstream 4a in order to prevent the water supply from being hindered by the heat exchanger 24 at the upstream 4b of the hot water circulation path 4 to speed up the primary water filling operation.

In the secondary water filling operation, the bypass valve 29 is closed so that the discharge pressure of the circulation pump 2 does not escape to the bypass passage 28, and the upstream side of the convex pipe portion such as the parallel circulation passage 9 (the header 7). The discharge pressure acts from (the arrangement side) to effectively push out the air. The circulation pump 2 is driven to suck the water stored in the water supply tank 1 through the water supply port 5, and vigorously sends the water stored in the water supply tank 1 to the parallel circulation path 9 with the discharge pressure of the circulation pump from the upstream 4b. Then, the air remaining at the time of the primary water filling operation of the convex pipe portion is pushed out and discharged from the water supply tank 1 to the atmosphere via the downstream 4a. When the air escapes from the hot water circulation path 4, the water flow rate rapidly increases, and the water flow detector 30 detects a predetermined flow rate that cannot be detected when the flow rate changes or the air passes, and outputs a signal. Air bleeding judgment device 3 which received this signal
Reference numeral 5 determines the completion of air bleeding of the parallel circulation path 9 and instructs the water flow control valve 12 to close, and then instructs the water flow control valve 13 to open via the connection terminal 38 which is the second registration number. Output a signal. Thereafter, the parallel circulation paths 10 and 11 are similarly deflated to complete the water filling. When the automatic water filling controller 34 receives the water filling completion signal from the last registration number from the air bleeding determination device 35, it instructs the air bleeding completion notification device 33 to notify the completion of water filling. Further, in response to the completion signal of the automatic water filling controller 34, the controller 27 erases the instruction signal of the air bleeding switch 32 and stops the air bleeding operation sequence.

As the convex piping portion such as the parallel circulation path 9, especially the radiator 15 has a large water resistance even during normal water flow,
When the air is accumulated, the water resistance becomes remarkable. Therefore, the water flow control valve 12 and the like may also have a flow rate adjusting function to temporally change the water flow rate depending on the valve opening degree, and to adjust the pressure of the air discharged by the circulation pump 2 to push out the air.

As described above, in the secondary water filling operation, the air bleeding determination device 35 can mechanically easily, reliably and quickly determine the completion of air bleeding to shorten the time required for detection. 34 automatically and efficiently executes the connection terminal board 36 in the order of registration.

It should be noted that the air bleeding determination device 35 is the parallel circulation path 9
It is possible to eliminate the need for the water flow detector 30 by setting the time required for air removal such as according to the enforcement conditions. Further, the water supply tank may be of a closed type and provided with an automatic air bleeding valve.

[0018]

As is clear from the above description, in the hot water heating apparatus of the present invention, when the air vent switch is operated, the automatic water tension controller opens the water flow control valve according to the registration order of the rank register. The air bleeding judgment device closes the valve, and the parallel circulation paths including the hot water circulation path are automatically bleeded in order, improving the efficiency of air bleeding work and shortening the required time to speed it up. In addition, the air bleeding judgment device automatically makes objective and accurate air bleeding judgment based on the detection signal of the water flow detector or abundant experimental data, and the subjective and highly specialized technology based on the experience by hearing is applied. It is not necessary and the air bleeding work can be facilitated.

[Brief description of drawings]

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

FIG. 2 is a configuration diagram of a conventional hot water heating device.

[Explanation of symbols]

 4 Hot water circulation path 12, 13, 14 Water flow control valve 15, 16, 17 Radiator 30 Water flow detector 32 Air bleeding switch 34 Automatic water filling controller 35 Air bleeding determination device 36 Connection terminal board

Claims (1)

[Claims] 1. A hot water circulation passage for heating the stored water in a water supply tank and sucking / discharging by a circulation pump, and a radiator for connecting the hot water circulation passage in parallel to radiate the circulation hot water and controlling the water passage. A parallel registration circuit having a parallel circulation path, an air removal switch for instructing operation of air removal of both circulation paths, and an order registration device for registering a sequence as a control target at the time of air removal by electrical connection of a water flow control valve. And a predetermined time after opening the water flow control valve or an air bleeding judgment device that judges whether the valve is closed by the water flow detection of the water flow detector installed in the hot water circulation path where the parallel circulation path merges, and the operation instruction signal of the air bleeding switch Open the water flow control valve for each registration order of the order registration device and close it by the closing judgment signal of the air bleeding judgment device, and close the water flow control valve in the final registration order to complete the air bleeding. Equipped with an automatic water tension controller that outputs a signal Hot-water heating system.