KR0174225B1 - Hot water circulation type heating device - Google Patents

Abstract

[Configuration]

Even if the water level in the water tank 3 is lower than the minimum water level at the start of energization, the water supply is not immediately supplied, and operation start operation of the heating water heater is performed through the remote controller 51 so that the water tank 3 is supplied as a water supply. It was.

[effect]

Since the above operation start operation can be performed after opening the faucet HK to remove the residue, the residue such as sand that has entered the water pipe during construction does not enter the hot water circulation path.

Description

Hot water circulation heating system

1 is a view showing a connection state of the hot water heater and peripherals.

2 is a view showing a pipe state in a hot water heater.

3 is a flowchart showing control contents.

* Explanation of symbols for main parts of the drawings

1: gas hot water heater 2: pump

3: water tank 4: (liquid-liquid) heat exchanger

5 controller 31 electrode

32: electrode 33a: on-off valve

51: remote control 5H: temperature sensor (on the primary hot water side)

5L: Temperature sensor A (on the secondary hot water side) A: Air conditioner

B: Bathtub D: Room temperature sensor

Fa: Hot Water Mat Fb: Hot Water Mat

S: Separator Va: Valve

Vb: On-off valve

[Industrial use]

The present invention relates to a hot water circulation heating device having a hot water heater for heating by hot water circulation, wherein the hot water circulation heating device has a water tank in the middle of a circulation path of hot water.

[Prior art]

In this type of heating device of the related art, since the water tank is open to the atmosphere, the hot water is always evaporated from the water tank, thereby reducing the quantity of water. It is necessary to replenish the water when the water level is lowered because hot water is reduced and the heating operation is not available, and parts such as the heat exchanger using the burner as a heat source are deteriorated or noise is generated by idling of the circulation pump. .

Here, in the prior art, the water level in the water tank is detected in at least two levels of at least the lowest water level and the highest water level, and when the water level drops to the lowest water level while energizing the heating device, the tap water is supplied until the water level reaches the highest water level. In addition, during the freezing prevention operation in which the water in the circulation path is circulated by the pump operation when the heating operation is not performed, the pump is not idled at all times. .

[Problems that the invention tries to solve]

In the case of newly installing a hot water circulation heating system in a new building such as an apartment or a mansion, the water pipe connected to the hot water circulation heating system is buried in a wall such that only the tip thereof is exposed during construction. The hot water circulation heating device is connected to the distal end of the water pipe exposed at this point. By the way, in the tip part of exposed water pipe, residues such as sand may enter during construction, and when the electricity of the hot water circulation heating system is started and water is automatically supplied into the water tank, the residue enters the circulation path of hot water and Together, they cycle through the circulation path. In addition, if the residue is caught in the middle of the circulation path, other residues are also caught in the portion, which causes the hot water circulation path to be blocked.

Here, in view of the above problems, it is an object of the present invention to provide a hot water circulation heating device that does not enter the residue into the circulation path of hot water.

[Means for solving the invention]

The invention according to claim 1 for achieving the above object is a hot water circulation heating apparatus having a hot water heater for heating by hot water circulation, wherein a water tank is installed in the middle of a circulation path of hot water, and at least a water level in the water tank is provided. When the water level is detected in two stages above and below the lowest level and the highest level, and the water level falls to the lowest level, the water is supplied into the water tank from the tap water until the water level reaches the highest level. If the water level in the water tank is lower than the minimum level when the hot water circulating heating system is started, the water supply to the water tank is instructed until the start of operation of the hot water heater is instructed. Characterized in that the water forbidden means is formed to prohibit.

In addition, the invention of claim 2 is characterized in that the hot water circulation heating device is provided with a hot water heater separately from the hot water heater, and the faucet is a tap for hot water connected to the hot water heater.

[Action]

Immediately after a new hot water heating system is installed, the water level will be below the minimum level because the water tank is empty. On the other hand, during the energization of the heating device, the water level in the water tank installed in the circulation path of hot water is always located between the lowest level and the highest level.

If it is judged that the water level in the water tank at the start of electricity supply is lower than the minimum water level, it is judged that there is a possibility that residues remain in the water pipe immediately after the hot water circulation heating system is installed. Prohibit. When the faucet is opened, the dregs are discharged together with the tap water, so that the dregs can be removed.

Since the water level needs to be lowered after the removal of debris is completed or when the water level is lower than the minimum level because the hot water circulation heating system has not been used for a long time, the water tank is released by releasing the water supply prohibition when the operation of the heating water heater is operated. The water supply to the furnace was made to run.

In addition, the hot water heater (eg, instantaneous water heater) may be installed in the heating device to provide a hot water supply function. In this case, the hot water tap may be opened to remove the dregs through the hot water heater.

EXAMPLE

FIG. 1 shows an outline of a system for heating a hot water and heating a bath water freely of "strong / weak" switching using a gas water heater (1). In the case of the warm air heating operation, the hot water heater (hereinafter referred to as primary hot water) is supplied to the air conditioner A through the circulation path f1 by the gas hot water heater 1, and the indoor air is heated by hot water. Blow into the room as warm air.

The air conditioner (A) is provided with a blowing fan and a heat exchanger (heat radiator) in which the primary hot water flows and is located in the ventilation path of the fan. A proportional control valve Av is provided to increase or decrease the circulation amount of the primary hot water so that the amount of heat applied to the blowing air in the radiator is kept constant even if it is changed. In addition, the heating capacity can be set in two stages of "high / low". When set to the "high" side, "strong" heating is performed, and when set to the "low" side, "weak" heating is performed. In the present embodiment, a heat exchanger (cooler) cooled by a refrigerant upstream of the radiator can be used as a cooler in summer, and can also be used as a dehumidifier by simultaneously using the radiator and the cooler. In addition, when using as a dehumidifier, a radiator is operated on conditions similar to "weak" heating.

The plurality of drops in temperature by passing heat to the blower air from the fan through the radiator is returned to the gas hot water heater 1 through the plurality of passages b1. The refluxed plurality is again heated in the gas water heater (1) and sent out to the circulation path (f1) as primary hot water, while a part of the plurality before being heated is branched to the circulation path (f2) as secondary hot water, and the separator ( It is branched from S) to the circulation path f3 and the circulation path f4. Secondary hot water flowing through each circulation path (f3, f4) is supplied to each of the hot water mat (Fa, Fb) and heated to the bottom, it is returned to the gas water heater (1) as a plurality through the plurality of passage (b1).

When the bath water is heated, a path separate from the circulation paths between the primary hot water for the air conditioner A and the secondary hot water for the hot water mats Fa and Fb forms a hot water in the bath B. Is sucked through a plurality of passages (b2), using a part of the primary hot water sent to the air conditioner (A) to heat the hot water sucked in the bath through a liquid-liquid heat exchanger described later to the circulation path ( The heated hot water is returned to the bath through f5). In addition, D is an indoor temperature sensor which is a room temperature detection means, and detects the temperature of the room where the hot water mats Fa and Fb are installed.

Referring to FIG. 2, in the gas hot water heater 1, a hot water heat exchanger Ha having a burner (not shown) constituting the hot water heater H and a burner 10 constituting the hot water heater is provided. A heat exchanger 11 for heating as a heat source is separately installed. Water is supplied to the heat exchanger Ha from a water pipe W through a water pipe HP having a relatively large diameter, and the heated hot water is a faucet HK. It is hot water through.

On the other hand, in the heating operation, after the hot water circulated by the pump 2 is heated by the burner 10 through the heat exchanger 11 to become primary hot water, the circulation passage f1 in the pipe line 12. Is supplied. The plurality returned through the plurality of passages b1 are once stored in the water tank 3 and are sucked by the pump 2. By the way, the plurality of discharged from the pump 2 is refluxed to the heat exchanger 11 through the conduit 13, a part of the plurality is branched into the conduit 14 as secondary hot water, the separator through the circulation path (f2) (S) is reached. The temperature of the primary hot water is detected by the temperature sensor 5H provided in the conduit 12, and the temperature of the secondary hot water is detected by the temperature sensor 5L provided in the conduit 14.

The separator S is provided with thermo-opening valves Va and Vb corresponding to the circulation paths f3 and f4. The hot water mat is opened by opening and closing the inlets of the circulation paths f3 and f4. The supply of secondary hot water to (Fa, Fb) can be passed / blocked.

However, the shut-off valves Va and Vb are provided with a wax pellet and a heater for heating the wax pellet therein, and the piston is slid by heating and inflating the wax enclosed by the slide-free piston in the wax pellet by the heater. To open the valve by pressing the valve element with a rod of wax pellets integrally formed on the piston. Moreover, the plurality which passed through the hot water mats Fa and Fb is returned to the water tank 3 via the plurality of passages b1. In addition, the circulation path f1 and the plurality of passages b1 communicate with each other by a bypass BP to close the proportional control valve Av in the air conditioner A to stop the operation of the air conditioner A. When the floor heating is operated independently, the primary hot water flows directly into the water tank 3 through the bypass BP, and a part of the hot water is sent to the hot water mats Fa and Fb as the secondary hot water. The single operation of heating was made possible.

In addition, the water tank 3 is provided with an electrode 31 for detecting the highest water level and an electrode 32 for detecting the lowest water level, so that the water quantity of the water tank 3 is reduced so that the water surface is the electrode 32. When it is dropped from the lower end of the, the electronic closing valve 33a is opened by the control device 5 and the tap water is supplied through the water supply pipe 33 until the water surface contacts the tip of the electrode 31. In addition, even if the water surface in the water tank 3 overflows beyond the lower end position of the electrode 31, the excessively supplied tap water or hot water is discharged through the drain pipe 34.

By the way, the pipe line 12 is piped so as to branch a part of the primary hot water to the liquid-liquid heat exchanger 4 in the middle, and the opening and closing of the thermal type in the inlet portion of the primary hot water of the heat exchanger 4. The valve Vc is provided. The on-off valve Vc opens the valve only when the hot water in the bath B is heated. The hot water in the bath B is circulated by the pump 40 to the heat exchanger 4. When the hot water is insufficient, hot water is supplied from the hot water heater H to the heat exchanger H through the pipe line 41. And the tub B via the circulation path f5 or the plurality of passages b2. In addition, 42 is an open / close valve, which is opened when hot water from the hot water heater H is supplied into the bath B through the conduit 41, and the hot water passed through the open / close valve 42. Is supplied into the bath B via the check valve 43 and the flowmeter 44. In addition, 45 detects that the hot water in the plurality of passages b2 actually flows into the heat exchanger 4 by the operation of the pump 40 as a water flow switch. By operating 40) to prevent damage and noise caused by idling the pump (40).

If the state in which the operation is not performed for a long time after stopping the heating operation or the like continues, the water level may be lower than the minimum level when the hot water in the water tank 3 evaporates through the drain pipe 34 to start operation again. In such a case, it is conceivable to automatically supply water at the same time as the start of power supply. However, if the automatic water supply is set at the same time as the start of power supply, the building is constructed and the gas water heater (1) is newly installed for the first time. When the power is plugged in, the water supply is automatically supplied. As described above, when the gas hot water heater 1 is newly installed and energized for the first time, debris such as sand that has entered the water pipe W may remain during construction. It enters into the water tank (3).

Here, when the water level in the water tank 3 at the time of power supply start is lower than the minimum water level, even if power supply is started, it will not automatically supply water, and a warm air heating operation, a floor heating operation, and a bath water warming will be performed with respect to the remote control 51. It is necessary to be configured so that the start operation of the heating water heater such as the start operation of the operation is performed and the water is supplied as rain.

When the heating operation start operation or the like is performed with respect to the remote controller 51 as described above, the faucet may be operated even if the system has been operated at least once or even after the gas water heater 1 is installed for the first time. Since it is the case of either side of opening the HK and removing the residue, there is no problem even if water is supplied to the water tank 3.

For the above operation, if the water level in the water tank 3 is referred to as 'L', the lowest water level is referred to as 'LH', and the lowest water level is referred to as 'LL', as shown in FIG. S1) First, it is first determined whether the water level (L) in the water tank (3) is lower than the lowest water level (LL) (S2), and if the water level (L) is lower than the low water level (LL), there may be an operation instruction of the heating water heater. The state is maintained until it is (S3), and if there is the operation instruction, water is supplied until the water level L becomes the highest water level LH (S4, S5).

In addition, open the faucet (HK) to discharge the debris in the water pipe (W) through the heat exchanger (Ha) from the water supply pipe (HP), because the hot water supply path is set to a relatively large diameter does not block the garbage. . Further, in the above embodiment, the faucet HK is installed for tapping the hot water heater H, but the faucet may be installed directly in the water pipe HP without installing the hot water heater H.

[Effects of the Invention]

As can be seen from the above description, the present invention does not automatically supply water even when the water level in the water tank at the time of power supply is lower than the minimum water level, and the operation of starting the operation of the heating water heater is performed so that the water is supplied as rain. Therefore, water can be supplied to the water tank after removing residues such as sand that has entered the water pipe during construction of the building, so that the residue does not enter the circulation path of hot water.

Claims (2)

A hot water circulation type heating device having a hot water heater for heating by a hot water circulation, wherein a water tank is installed in the middle of a circulation path of hot water, and the water level in the water tank is detected in at least two levels of at least the lowest level and the highest level. Water supply from the water supply to the water tank until the water level reaches the lowest water level, the faucet is connected to the water supply passage of the water tank to discharge the water at least in the non-water supply to the water tank, When the water level in the water tank is lower than the minimum water level at the start of energization of the hot water circulating heating device, a water supply prohibiting means for prohibiting the water supply to the water tank until the operation start of the heating water heater is instructed Hot water circulation heating system. The hot water circulation heating apparatus according to claim 1, wherein the hot water circulation heating device comprises a hot water hot water heater separately from the heating hot water heater, and the faucet is a tap for tap which is connected to the hot water hot water heater.