JP4966925B2 - Heating system - Google Patents

Description

  The present invention relates to a heating system that uses hot water heated by a heating heat exchanger for indoor heating equipment such as floor heating mats and bathroom heating.

  As this type of heating system, for example, as shown in FIG. 2, from a hot water supply device (100) installed outdoors to a room heating device (3) such as a floor heating mat (3a) or a bathroom heater (3b). Some supply hot water. The hot water supply device (100) includes a circulation heating circuit (30) provided with a heating heat exchanger (31), and the circulation heating circuit (30) is connected to the indoor heating device (3). In addition, the circulation heating circuit (30) includes a cistern (32) that forms an air space that absorbs expansion of the circulating water due to heating, and a heating pump (P) that circulates the circulating water in the circulation heating circuit (30). Is provided.

  Then, by driving the heating pump (P) and circulating the circulating water in the circulating heating circuit (30), the circulating water is heated by the heating heat exchanger (31), and then to the floor heating mat (3a). Are sent to indoor heaters (3) such as floor heating mat (3a) and bathroom heater (3b) from high-temperature heating outlet pipe (33b) to low-temperature heating forward pipe (33a) and bathroom heater (3b), respectively. . The circulating water radiated by the indoor heating device (3) passes through the return pipe (34) and is returned to the heating heat exchanger (31) through the systern (32). Thus, the circulating water is heated and heated by the heating heat exchanger (31) while circulating through the circulation heating circuit (30), and the warming water (circulating water) is supplied to the indoor heating device (3) to perform heating. .

Further, since the circulating water in the circulation heating circuit (30) decreases due to evaporation or the like, water is replenished from the water supply (22). That is, the supply channel (20) derived from the water supply (22) is connected to the cistern (32), and when the water level of the circulating water in the cistern (32) is lowered to the low water level position, the supply channel (20 ), The water replenishing solenoid valve (21) is opened, and water is replenished from the replenishment water channel (20) to the cistern (3).
JP 2006-112752 A

  By the way, the cistern (3) has a function of preventing the circulating water in the circulation heating circuit (30) from flowing back to the make-up water channel (20) and is open to the atmosphere at the top. . Thus, when the cistern (32) is open to the atmosphere, mold and bacteria enter the circulation heating circuit (30) from the outside through the cistern (32), and mold and bacteria propagate in the circulating water, Algae may be generated. For example, if the indoor heating device (3) is not used for a long period of time in summer, etc., and circulating water is left in the circulating heating circuit (30) for a long period of time, mold and germs proliferate actively in the circulating water during that period. And algae are generated. Then, if the heating pump (P) is driven in this state, the inside of the circulating heating circuit (30) is clogged with mold, germs, and algae, resulting in a disadvantage that the heating performance of the indoor heating device (3) is lowered.

  The present invention has been made in view of the above points, and it is possible to provide circulating water with a sterilizing function in order to prevent the growth of mold and bacteria in the circulating water in the circulating heating circuit and the generation of algae. It is an object to provide a heating system.

A heating system according to the present invention includes:
In a heating system having a recirculation heating circuit having an open air system in a circulation heating circuit connected to a room heating device and replenishing circulation water from a water supply in the circulation heating circuit,
A silver ion generator for sterilization is provided in the replenishment water channel, and a configuration in which silver ions generated from the silver ion generator are mixed in the replenishment water that is passed through the replenishment water channel ,
A downstream end of the makeup water channel is connected to the cistern, and a supplementary water electromagnetic valve that opens and closes according to the water level in the cistern is provided in the makeup water channel,
When the circulating water level in the cistern falls and the supplementary water solenoid valve is opened, the silver ion generator is driven, the circulating water level in the cistern reaches a predetermined water level, and the supplementary solenoid valve is closed. Then, the silver ion generator is configured to stop driving,
The said silver ion generator shall be the structure provided in the cistern side rather than the said water replenishment solenoid valve .
According to the above configuration, when water from the water supply is supplemented into the circulation heating circuit through the supplementary water channel, the supplemental water flowing through the supplemental water channel is mixed with silver ions when passing through the silver ion generator. It becomes. Thereby, silver ion water is mixed with the circulating water in a circulating heating circuit. Since silver ions have antibacterial and bactericidal effects, the cistern of the circulating heating circuit is opened to the atmosphere, and even if the circulating water is left in the circulating heating circuit for a long time, Proliferation of various bacteria and generation of algae can be suppressed.

As the heating system, the downstream end of the replenishing water channel is connected to a cistern, and a replenishing electromagnetic valve that opens and closes according to the water level in the cistern is provided in the replenishing water channel. It is preferable that the silver ion generator is provided on the cistern side with respect to the water replenishing electromagnetic valve.
According to this, the silver ion generator is driven when the water refill solenoid valve is opened, and silver ion water is replenished to the cistern at the time of water refill when the water refill solenoid valve is opened. The silver ion concentration of circulating water can be secured above a certain level. Further, since the silver ion generation device is not driven when the water replenishing electromagnetic valve is closed, the silver ion generation performance of the silver ion generation device can be ensured over a long period of time. In addition, since the silver ion generator is provided on the cistern side with respect to the water replenishing electromagnetic valve, the silver ion water does not flow back to the water supply side when the water replenishing electromagnetic valve is closed.

  As described above, according to the present invention, even if the indoor heating device is left unused for a long period of time, the antibacterial and sterilizing effects of silver ions can cause mold and water to circulate in the circulating heating circuit. No germs grow and no algae develop. Therefore, inconveniences such as deterioration of the heating performance of the bathroom heating device due to clogging of mold, germs and algae in the circulation heating circuit can be prevented.

Hereinafter, embodiments of the present invention will be described.
As shown in FIG. 1, in the heating system according to the embodiment, a circulating heating circuit (30) is provided in a hot water supply device (1) as a heat source device installed outdoors, and the circulating heating circuit (30) is provided via the circulating heating circuit (30). A configuration for supplying warm water to the indoor heating device (3) such as the floor heating mat (3a) and the bathroom heater (3b) for heating is provided. Further, a hot water supply circuit (10) is provided in the hot water supply device (1), and the water passed from the water supply (22) to the water supply circuit (13) is heated by the hot water supply heat exchanger (11), The hot water passes through the hot water supply circuit (12) and is discharged from the kitchen, washroom and bathroom faucet. In addition, operation | movement of the whole heating system and the water replenishment operation | movement mentioned later are controlled by the control part (not shown) comprised by the microcomputer etc.

  The circulating heating circuit (30) includes a heating heat exchanger (31) for heating the circulating water in the circulating heating circuit (30), a cistern (32), and the circulating water in the circulating heating circuit (30) as cistern (32 ) To the heating heat exchanger (31) in the direction of the heating pump (P) and the like. The circulation heating circuit (30) is connected to an indoor heating device (3) such as a floor heating mat (3a) and a bathroom heater (3b). That is, the floor heating mat (3a) is connected to the hot water outlet (37a) of the low temperature heating outgoing pipe (33a) branched downstream of the heating pump (P) and the hot water outlet (34) of the return pipe (34) to the systern (32) It is connected to the circulating heating circuit (30) via 37b). The bathroom heater (3b) is connected to the circulation heating circuit (30) via the hot water outlet (38a) of the high temperature heating forward pipe (33b) and the hot water outlet (38b) of the return pipe (34) leading to the systern (32). Has been. Each of the floor heating mat (3a) and the bathroom heater (3b) is provided with a remote controller (not shown), and is operated by an operation with each remote controller.

  When the indoor heating device (3) such as the floor heating mat (3a) or bathroom heater (3b) is operated, the water flow valves (35) and (45) are opened, and the heating pump (P) is driven. The Then, the circulating water in the circulation heating circuit (30) is heated by the heating heat exchanger (31), and is supplied to the low temperature heating forward pipe (33a) to the floor heating mat (3a) and to the bathroom heater (3b). It is sent from the high temperature heating forward pipe (33b) to the floor heating mat (3a) and the bathroom heater (3b), respectively. The circulating water radiated by the floor heating mat (3a) and the bathroom heater (3b) passes through the return pipe (34) and is returned to the heating heat exchanger (31) through the systern (32). Thus, the circulating water is heated and heated by the heating heat exchanger (31) while circulating through the circulation heating circuit (30), and the hot water is supplied to the indoor heating device (3) to perform heating.

  The cistern (32) in the circulating heating circuit (30) is provided mainly to form an air space that absorbs the expansion of circulating water due to heating, is formed of a small container, and has a through hole on the upper surface to provide atmospheric air. It is open. An overflow pipe (39) is connected to the cistern (32) so that the water level does not exceed a predetermined upper limit level due to expansion of the circulating water. In addition, a supply channel (20) led out from the water supply (22) is connected to the upper surface of the cistern (32), and in the cistern (32), two water level electrodes for detecting a low water level and a high water level ( 36a) and 36b) are provided. When the circulating water that is circulated and heated in the heat exchanger for heating (31) decreases due to evaporation or the like, and the water level in the cistern (32) becomes less than the low water level electrode (36a), the supplementary water electromagnetic in the make-up water channel (20) When the valve (21) is opened and water is replenished from the water supply (22) through the replenishment channel (20) and the water level reaches the high water level electrode (36b), the water replenishing solenoid valve (21) is closed and the replenishment is terminated. . Since the cistern (32) has an air space inside and is open to the atmosphere, water supply from the water supply (22) is smoothly performed. Further, the supplementary water channel (20) is connected to the upper surface of the cistern (32), thereby preventing the backflow of the circulating water to the supplemental water channel (20).

By the way, since the cistern (32) is open to the atmosphere as described above, mold and bacteria enter the circulation heating circuit (30) from the outside through the cistern (32), and the mold and bacteria propagate in the circulating water. Also, algae may be generated, and in the worst case, mold, bacteria and algae in the circulating water may clog the circulating heating circuit (30) and reduce the heating performance of the indoor heating device (3). .
Therefore, in the present embodiment, by using the fact that clean water from the water supply (22) is appropriately replenished through the cistern (32) in the circulation heating circuit (30), the replenishing water at the time of replenishment is used. Bactericidal silver ions are mixed.

  Specifically, the replenishment water channel (20) includes a silver ion generator (2) that mixes silver ions into water flowing through the replenishment water channel (20) closer to the cistern (32) than the replenishment electromagnetic valve (21). Is provided. The silver ion generator (2) is a pair of silver electrodes (23) (23) disposed in the replenishment channel (20), and the silver electrodes (23) (23) are energized at a predetermined current value from a power source. And an energization control unit (not shown) for controlling as described above. Silver ions eluted by electrolysis of the silver electrodes (23) and (23) are energized between the pair of silver electrodes (23) and (23) through the water flowing in the makeup water channel (20). It is mixed in the water in (20). The elution amount Y of silver ions at this time is calculated by the following equation (1).

    Y = 108 At / F (1)

  Here, in the formula (1), “Y” is the silver ion elution amount from the silver electrodes (23) and (23), “108” is 1 gram equivalent of silver, and “A” is the silver electrodes (23) and (23). , “T” indicates the energization time of the silver electrodes (23) and (23), and “F” indicates the Faraday constant. Therefore, the elution amount (X) of silver ions from the silver electrodes (23) and (23) is set from the current value (A) to the silver electrodes (23) and (23) and the energization time (t). The current value (A) and the energization time (t) are set by the energization control unit. Therefore, the silver ion concentration of makeup water to the cistern (32) is the total amount of makeup water to be replenished to the cistern (32), the current value (A) to energize the silver electrodes (23) and (23), and the energization time (t). And can be set.

Next, the replenishing operation of the circulating water will be described.
When the circulating water evaporates from the open air part of the cistern (32) and the water level in the cistern (32) falls below the low water level electrode (36a), the water replenishing solenoid valves (21) and (21) are opened. The Further, the silver ion generator (2) is operated by opening the water replenishing electromagnetic valve (21). Then, water from the water supply (22) is passed through the replenishment channel (20), is distributed to the silver ion generator (2), and is replenished to the cistern (32). At this time, the makeup water flowing through the makeup channel (20) is mixed with silver ions eluted from the silver electrodes (23) and (23) of the silver ion generator (2) to become silver ion water. Therefore, all the water in the makeup channel (20) after passing through the silver ion generator (2) becomes silver ion water, and this silver ion water is supplemented to the cistern (32) and circulated in the circulation heating circuit (30). Silver ion water is mixed with water.

The elution amount Y of silver ions eluted in the makeup water by the silver ion generator (2) is set by the current value (A) and energization time (t) applied to the silver electrodes (23) and (23) as described above. The The amount of makeup water is the amount of water from the low water level detected by the low water level electrode (36a) of the cistern (32) to the high water level detected by the high water level electrode (36b). Furthermore, the total amount of circulating water in the circulating heating circuit (30) is also known from the piping diameter and piping length of the circulating heating circuit (30). Therefore, in order to obtain a predetermined silver ion concentration with respect to the circulating water in the circulating heating circuit (30), the elution amount of silver ions to be eluted in the makeup water is determined, and the silver electrode (23 ) (23) current value (A) and energization time (t) are determined, and the silver ion generator (2) may be operated along this. Thereby, the silver ion concentration of the circulating water in the circulating heating circuit (30) can always be kept above a certain level. Incidentally, the silver ion concentration at this time is preferably set to 100 ppb to 500 ppb, for example. This is because the silver ion concentration is preferably 100 ppb or more in order to exert the bactericidal effect, and the silver ion concentration is preferably 500 ppb or less in consideration of the consumption of the silver electrodes (23) and (23). is there.
And when the water level of the circulating water in the cistern (32) reaches the high water level electrode (36b) by the above water replenishment, the water replenishing electromagnetic valves (21) (21) are closed, and the silver ion generator (2) Is stopped and the water replenishment operation ends.

  According to the above embodiment, the silver ion concentration of circulating water can be kept constant by mixing silver ions into the circulating water in the circulating heating circuit (30). As a result, silver ions have antibacterial and bactericidal effects, so the cistern (32) of the circulating heating circuit (30) is opened to the atmosphere, and the indoor heating equipment (3) is not used in summer and the like, so that the circulating heating circuit Even when the circulating water is left in the (30) for a long period of time, it is possible to prevent the growth of mold and bacteria and the generation of algae in the circulating water. Therefore, inconveniences such as deterioration of the heating performance of the indoor heating device (3) due to clogging of mold, germs, algae and the like in the circulation heating circuit (30) can be prevented.

  Also, since the silver ion generator (2) is not driven when the water replenishing solenoid valve (21) is closed, the consumption of the silver electrodes (23) (23) is suppressed and the silver ion generator (2) Silver ion generation performance can be secured over a long period of time. Moreover, since the silver ion generator (2) is provided on the cistern (32) side of the water replenishing solenoid valve (21), the silver ion water is in the state where the water replenishing solenoid valve (21) is closed. There is no backflow to the water side.

In addition, since the makeup water is clean water from the water supply (22), it is not possible to attach dirt to the silver electrodes (23) and (23) by installing the silver ion generator (2) in the makeup water channel (20). In addition, elution of silver ions from the silver electrodes (23) and (23) can be performed smoothly over a long period of time. In addition, it is possible to prevent waste of electric power without loss of energization between the silver electrodes (23) and (23) due to dirt.
Further, since the replenishing operation is performed when the circulating water needs to be reduced, the replenishing water is not always passed through the silver electrodes (23) and (23). Accordingly, it is possible to suppress deterioration of the silver electrodes (23) and (23) due to chlorine components contained in new makeup water from the water supply (22).

In addition, this invention is not limited only to the said embodiment, A various change is possible within the scope of the present invention.
For example, in the above embodiment, silver ions are mixed in the replenishing water at the time of replenishing, but when the circulating water is filled into the circulation heating circuit (30) through the replenishing water channel (20) when the heating system is installed. It is also possible to mix silver ions. In this case, silver ions can be mixed into the circulating water in the circulating heating circuit (30) from the time of installation of the heating system.
The silver ion generator (2) may be provided in the circulation heating circuit (30), for example, in the return pipe (34) as shown by the two-dot chain line in FIG. ) May be provided. Thus, for example, by periodically operating the silver ion generator (2) and mixing silver ions into the circulating water in the circulating heating circuit (30), the silver of the circulating water in the circulating heating circuit (30) The ion concentration can always be kept above a certain level, and therefore, the growth of mold and bacteria in the circulating water, the generation of algae and the like can be reliably prevented.

It is a lineblock diagram showing the whole heating system composition by an embodiment. It is a block diagram which shows the whole structure of the conventional heating system.

Explanation of symbols

(1) ... Hot water supply equipment
(2) ... Silver ion generator
(3) ... Room heating equipment
(20) ... Supply waterway
(21) ... Water replenishing solenoid valve
(22) ・ ・ ・ Water supply
(30) ・ ・ ・ Circulating heating circuit
(31) ... Heat exchanger for heating
(32) ・ ・ ・ Sistern

Claims (1)

In a heating system having a recirculation heating circuit having an open air system in a circulation heating circuit connected to a room heating device and replenishing circulation water from a water supply in the circulation heating circuit,
A silver ion generator for sterilization is provided in the replenishment water channel, and a configuration in which silver ions generated from the silver ion generator are mixed in the replenishment water that is passed through the replenishment water channel ,
A downstream end of the makeup water channel is connected to the cistern, and a supplementary water electromagnetic valve that opens and closes according to the water level in the cistern is provided in the makeup water channel,
When the circulating water level in the cistern falls and the supplementary water solenoid valve is opened, the silver ion generator is driven, the circulating water level in the cistern reaches a predetermined water level, and the supplementary solenoid valve is closed. Then, the silver ion generator is configured to stop driving,
The said silver ion generator is a heating system provided in the cistern side rather than the said water replenishment solenoid valve .

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