JP5053340B2 - Heat source machine for heating - Google Patents

Description

  The present invention relates to a heating heat source that supplies hot water to a heating terminal.

  Conventionally, as this type of heating heat source machine, a burner, a heat exchanger having a latent heat recovery type heat exchanger that recovers the latent heat of combustion exhaust gas from the burner, and an operation of a circulation pump between the heating terminal and the heat exchanger It is known to have a cistern interposed in a heating circuit that circulates water by means of a water supply and a rehydration valve that replenishes the cistern with water.

  Here, in the latent heat recovery type heat exchanging section, moisture in the combustion exhaust gas is condensed and strongly acidic drain is generated. For this reason, a neutralizer is provided in the drainage drain to neutralize the drain before discharging.

  By the way, since the upstream end of the drainage drainage channel faces the passage of the combustion exhaust gas, not only the drain but also the combustion exhaust gas may be discharged through the drainage channel. Therefore, conventionally, neutralization having an inflow side storage portion positioned on the drain inflow side, an outflow side storage portion positioned on the drain discharge side, and a communication portion communicating the inflow side storage portion and the outflow side storage portion When the water level in the neutralizer becomes equal to or higher than a predetermined level, a communicating part sinks below the surface of the water and is in a water-sealed state capable of preventing the passage of combustion exhaust gas. (For example, refer to Patent Document 1).

  In this case, a water supply valve is provided in a water supply path connected to the neutralizer, and a water level detecting means for detecting whether or not the water level in the neutralizer is equal to or higher than a predetermined level is provided. When it becomes lower than the level, the water supply valve is opened to supply water to the neutralizer so that the neutralizer is maintained in a water-sealed state. However, this requires a dedicated water supply valve for the neutralizer, which increases the cost.

JP 2008-298367 A

  In view of the above, the present invention has as its subject to provide a low-cost heating heat source unit that can maintain a neutralizer in a water-sealed state without using a dedicated water supply valve for the neutralizer. Yes.

  The present invention relates to a heat exchanger having a burner, a latent heat recovery type heat exchanger that recovers the latent heat of combustion exhaust gas from the burner, and a heating circuit that circulates water between the heating terminal and the heat exchanger by operating a circulation pump. A heat source machine for heating, comprising a cistern interposed in the cistern, a refill valve for supplying water to the cistern, and a neutralizer interposed in a drainage path of a drain generated in the latent heat recovery type heat exchange unit, The vessel has an inflow side reservoir located on the drain inflow side, an outflow side reservoir located on the drain side of the drain, and a communication portion communicating the inflow side reservoir and the outflow side reservoir. The water level in the neutralizer is configured so that when the water level in the sump rises above a predetermined level, the communicating part sinks below the surface of the water and enters a water-sealed state that can prevent the passage of combustion exhaust gas. The water level detection means for detecting whether or not it is above and the water level is at a predetermined level When it becomes low, in which a control unit for replenishing water to the neutralizer, in order to solve the above problems, is characterized by employing the following matters.

  That is, according to the present invention, an overflow pipe connected to the cistern is connected to the neutralizer, and the control means opens the water refill valve when the water level detecting means detects that the water level is lower than a predetermined level. Further, the present invention is characterized in that control is performed so that water overflowed from the cistern is supplied to the neutralizer via the overflow pipe.

  According to the present invention, the neutralizer can be maintained in a water-sealed state by supplying water to the neutralizer through the cistern by a cistern replenishment valve conventionally provided in the heating heat source unit. This eliminates the need for a dedicated water supply valve for the neutralizer, thereby reducing costs.

  Further, in the present invention, the control means is configured to perform control to cause the water to overflow from the cistern and to inject water into the neutralizer when the water filling is performed by opening the water refill valve and injecting water into the heating circuit. It is desirable. According to this, the neutralizer can be put in a water-sealed state during water filling, and combustion exhaust gas can be prevented from being discharged from the drain drainage channel during the heating trial operation of the heat source device after water filling.

Explanatory drawing which shows the structure of the heat-source equipment for heating of embodiment of this invention. The flowchart which shows the content of the water supplement control with respect to the neutralizer which the controller of the heat-source equipment of embodiment performs. The flowchart which shows the content of the water filling control which the controller of the heat-source equipment of embodiment performs.

  Referring to FIG. 1, reference numeral 1 denotes a housing of a heating heat source machine. The housing 1 contains a can body 2. In the can 2, a burner 3 is arranged at the lower part and a heat exchanger 4 is arranged at the upper part. A combustion fan 5 that supplies combustion air into the can body 2 is connected to the lower end of the can body 2.

  The heat exchanger 4 includes a sensible heat recovery type first heat exchange unit 4a that recovers sensible heat of the combustion exhaust gas of the burner 2, and a latent heat recovery type second heat that condenses moisture in the combustion exhaust gas to recover latent heat. It is comprised with the exchange part 4b. A drain receiver 6 that receives drain generated in the second heat exchange section 4b is provided below the second heat exchange section 4b. Then, a neutralizer 8 is provided in the drainage channel 7 connected to the drain receiver 6 so that the strongly acidic drain is neutralized by the neutralizer 8 and then discharged.

  Moreover, the heating circuit 9 which circulates water by the action | operation of the circulation pump 11 mentioned later between the heating terminal outside a figure and the heat exchanger 4 is provided. The heating terminal includes a high-temperature heating terminal such as a bathroom heater and a low-temperature heating terminal such as floor heating. The heating circuit 9 includes a flow path 9a for returning water from the high-temperature heating terminal and the low-temperature heating terminal to the second heat exchange section 4b, and a flow path for sending water that has flowed to the second heat exchange section 4b to the first heat exchange section 4a. 9b and a flow path 9c that sends the water that has flowed to the first heat exchanging section 4a to the high-temperature heating terminal, and a cistern 10 and a circulation pump 11 are interposed in the flow path 9b. The heating circuit 9 further includes a flow path 9d that branches from the flow path 9b between the circulation pump 11 and the first heat exchange unit 4a, and a flow path 9d that feeds water to the low temperature heating terminal, and a flow path 9c that branches from the flow path 9c. 10 and a flow path 9f provided with a bypass valve 9e for returning water to the water.

  A water replenishment passage 12 is connected to the upper end of the cistern 10, and a water replenishment valve 13 is provided in the water replenishment passage 12. Further, in the cistern 10, a low water level electrode 10a and a high water level electrode 10b are provided. When the water level in the cistern 10 is lower than the lower end of the low water level electrode 10a and the low water level electrode 10a is turned off, the refill valve 13 is opened by the controller 14 as the control means until the high water level electrode 10b is turned on. The cistern 10 is replenished with water. The cistern 10 is further connected with an overflow pipe 15 for draining the overflowed water when the water level reaches or exceeds a predetermined full tank level due to thermal expansion.

  The neutralizer 8 includes a partition wall 8d that divides the internal space of the vessel body 8a into an inflow side reservoir 8b located on the drain inflow side and an outflow side reservoir 8c located on the drain discharge side. Yes. The lower end of the partition wall 8d does not reach the bottom surface of the vessel body 8a, and a communication portion 8e that connects the inflow side storage portion 8b and the outflow side storage portion 8c is formed between the lower end of the partition wall 8d and the bottom surface of the container body 8a. Is done. When the water level in the neutralizer 8 becomes equal to or higher than the level at the lower end of the partition wall 8d, the communicating portion 8e sinks below the surface of the water so as to be in a water-sealed state that can prevent passage of combustion exhaust gas. The vessel body 8a is filled with a neutralizing agent (not shown).

  Further, in the neutralizer 8, there is provided a water level electrode 8f as water level detecting means that is turned on when the water level is a predetermined level or higher that is slightly higher than the lower end of the partition wall 8d. Then, the overflow pipe 15 connected to the cistern 10 is connected to the neutralizer 8, and when the water level electrode 8 f is turned off by the controller 14, the supplementary water valve 13 is opened to replenish the neutralizer 8 with water. Control is performed.

  The details of the water replenishment control for the neutralizer 8 are as shown in FIG. 2. First, in STEP 1, it is determined whether or not the water level electrode 8 f is turned off. When the water level in the neutralizer 8 becomes lower than the predetermined level and the water level electrode 8f is turned off, the process proceeds to STEP 2 and the water refill valve 13 is opened. In this case, even if the high water level electrode 10 b of the cis turn 10 is turned on, the water refill valve 13 is not closed, and water overflowed from the cis turn 10 is supplied to the neutralizer 8 through the overflow pipe 15.

  Next, in STEP 3, it is determined whether or not the water level electrode 8f is turned on. When the water level in the neutralizer 8 rises to a predetermined level and the water level electrode 8f is turned on, the water refill valve 13 is closed in STEP 4, and then the process returns to STEP 1 to repeat the water replenishment control.

  Thus, in this embodiment, the neutralizer 8 can be maintained in a water-sealed state by replenishing water to the neutralizer 8 via the cistern 10 by the refill valve 13 for the cistern 10. For this reason, a dedicated water supply valve for the neutralizer 8 is not required, and the cost can be reduced.

  Further, the controller 14 performs the water filling control shown in FIG. 3 when the water filling switch is turned on after the heat source device is installed. In the water filling control, first, the water refill valve 13 is opened in STEP 11, and a terminal thermal valve (not shown) that passes water to the heating terminal is opened in STEP 12, and water is injected into the heating circuit 9. Next, in STEP 13, it is determined whether or not the high water level electrode 10 b of the cistern 10 is turned on. When turned on, the process proceeds to STEP 14, and whether or not a predetermined time (for example, 60 seconds) has elapsed since turning on is determined. Determine. And when predetermined time passes, a thermal valve for terminals is closed by STEP15.

  Next, it progresses to STEP16 and it is discriminate | determined whether the water level electrode 8f of the neutralizer 8 was turned on. When the water level electrode 8f is turned on, the water refill valve 13 is closed in STEP 17, and the water filling control is terminated. According to this, the neutralizer 8 can be put in a water-sealed state at the time of water filling, and combustion exhaust gas can be prevented from being discharged from the drain drainage channel 7 at the time of trial operation of the heat source device after water filling.

  As mentioned above, although embodiment of this invention was described with reference to drawings, this invention is not limited to this. For example, in the above-described embodiment, the present invention is applied to a heating-only heat source apparatus having only the heating heat exchanger 4, but heating and hot water supply provided with a heating heat exchanger and a hot water supply heat exchanger are provided. Similarly, the present invention can be applied to a composite heat source machine.

  DESCRIPTION OF SYMBOLS 3 ... Burner, 4 ... Heat exchanger, 4b ... 2nd heat exchange part (latent heat recovery type heat exchange part), 7 ... Drainage channel, 8 ... Neutralizer, 8b ... Inflow side storage part, 8c ... Outflow side storage part 8e ... communication part, 8f ... water level electrode (water level detection means), 9 ... heating circuit, 10 ... systern, 11 ... circulation pump, 13 ... replenishment valve, 14 ... controller (control means), 15 ... overflow pipe.

Claims (2)

A burner, a heat exchanger having a latent heat recovery type heat exchanger that recovers the latent heat of the combustion exhaust gas of the burner, and a heating circuit that circulates water between the heating terminal and the heat exchanger by operating a circulation pump A heating heat source machine comprising a cistern, a water replenishment valve for supplying water to the cistern, and a neutralizer interposed in a drainage path of a drain generated in the latent heat recovery type heat exchange unit,
The neutralizer has an inflow side storage portion located on the drain inflow side, an outflow side storage portion located on the drain discharge side, and a communication portion communicating the inflow side storage portion and the outflow side storage portion. When the water level in the neutralizer becomes a predetermined level or more, the communication part is configured to sink under the water surface so as to be in a water-sealed state capable of preventing the passage of the combustion exhaust gas.
In what comprises a water level detection means for detecting whether or not the water level in the neutralizer is equal to or higher than a predetermined level, and a control means for supplying water to the neutralizer when the water level becomes lower than the predetermined level,
The overflow pipe connected to the cis turn is connected to the neutralizer, and the control means opens the water refill valve when the water level detection means detects that the water level is lower than the predetermined level, and the water overflowed from the cis turn is detected. A heat source unit for heating, which is configured to perform control to replenish the neutralizer through an overflow pipe.   The control means is configured to perform control of causing water to overflow from the cistern and injecting water into the neutralizer when the water filling is performed to open the water refill valve and inject water into the heating circuit. The heating heat source machine according to claim 1, wherein:

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