Boiler having increased indoor heating efficiency and enabling simultaneous use of indoor heating and hot water

Patent metadata

Field	Value
Publication number	US-9869490-B2
Application number	US-201314398688-A
Country	US
Kind code	B2
Filing date	Apr 15, 2013
Priority date	May 3, 2012
Publication date	Jan 16, 2018
Grant date	Jan 16, 2018

Abstract

The boiler of the present invention which enables the simultaneous use of heating and hot water includes: an internal heating-water discharge line for heating water, which has a circulation path for heating water forcibly fed by an internal circulation pump between a tank and a main heat exchanger; a supply water discharge line for heating water, which has a circulation path for heating water forcibly fed by an external circulation pump and supplied and returned from/to the tank and an indoor heating mechanism; and a three-way valve provided on a second indoor heating water connecting pipe of the internal heating-water discharge line for heating water, which adjusts the degree to which it is opened according to the indoor heating load and the hot water load in order to supply hot water passing through the main heat exchanger to the tank and a hot-water heat exchanger. The internal heating-water discharge line of the boiler and the supply water discharge line for heating water are connected to the internal space of the tank disposed therebetween.

First claim

The invention claimed is:

1. A boiler having enhanced heating efficiency and enabling simultaneous use of heating and hot water, the boiler including a tank having a space provided therein for storing heating-water, a main heat exchanger for heating heating-water using combustion heat of a burner and a hot-water heat exchanger for heating cold water into hot water through a heat exchange between heating-water heated in the main heat exchanger and the cold water, comprising;
a boiler internal water piping line composed of a first heating-water connecting pipe through which heating-water in the tank is supplied to the main heat exchanger and a second heating-water connecting pipe through which heating-water passed through the main heat exchanger is supplied to the tank, thereby forming a heating-water circulation flow path for heating-water forcibly fed by an internal circulation pump between the tank and the main heat exchanger;
a heating-water supply piping line composed of a heating-water supply pipe for supplying heating-water in the tank to heating equipment and a heating-water return pipe for returning heating-water passed through the heating equipment to the tank, thereby forming a heating-water circulation flow path for supplying and returning heating-water forcibly fed by an external circulation pump between the tank and the heating equipment; and
a three way valve provided on the second heating-water connecting pipe, an opening rate thereof being adjusted depending on a heating load and hot water load to supply heating-water passed through the main heat exchanger toward the tank and the hot water exchanger,
wherein the boiler internal water piping line and the heating-water supply piping line are connected to each other via the space in the tank,
wherein a first connecting pipe is installed between the three way valve and the hot-water heat exchanger for supplying heating-water passed through the main heat exchanger to the hot-water heat exchanger and a second connecting pipe for returning heating-water passed through the hot-water heat exchanger to the tank is installed between the hot-water heat exchanger and the tank,
the second connecting pipe, the first heating-water connecting pipe, and the heating-water return pipe are installed separately from one another,
wherein a main heat exchanger connecting port connected to the second heating-water connecting pipe is formed on one side of an upper portion of the tank, and a heating-water supplying port connected to the heating-water supply pipe is formed on the other side of the upper portion of the tank, and a pump connecting port connected to the internal circulation pump installed on the first heating-water connecting pipe is formed on one side of a lower portion of the tank, and a heating-water returning port connected to the heating-water return pipe and a heating-water inlet port connected to the second connecting pipe are formed on the other side of the lower portion of the tank.

2. The boiler having enhanced heating efficiency and enabling simultaneous use of heating and hot water of claim 1 , wherein the internal circulation pump is provided on the first heating-water connecting pipe and the external circulation pump is provided on the heating-water supply pipe.

3. The boiler having enhanced heating efficiency and enabling simultaneous use of heating and hot water of claim 1 , wherein an air/water separator for discharging air contained in heating-water in the tank to an outside of the tank is provided on the upper portion of the tank.

4. The boiler having enhanced heating efficiency and enabling simultaneous use of heating and hot water of claim 1 , wherein a filter for filtering foreign substance contained in heating-water flowing into the tank through the heating-water returning port and the heating-water inlet port is provided on the lower portion of the tank.

5. The boiler having enhanced heating efficiency and enabling simultaneous use of heating and hot water of claim 1 , wherein the heating-water supply pipe is provided with a first temperature sensor for measuring a temperature of heating-water supplied from the tank to the heating equipment and the second heating-water connecting pipe is provided with a second temperature sensor for measuring a temperature of heating-water heated in the main heat exchanger and supplied to the tank, whereby a temperature of heating-water, which is measured by the second temperature sensor, is controlled by adjusting the combustion rate of the burner so that a supply temperature of heating-water, which is measured by the first temperature sensor, reaches a first supply target temperature of heating-water.

6. The boiler having enhanced heating efficiency and enabling simultaneous use of heating and hot water of claim 1 , wherein, in the hot water mode of the boiler, the three way valve has a heating-water supply flow path for allowing all of heating-water, which flows from the main heat exchanger, to be supplied to the tank, heating-water in the tank passes through the internal circulation pump via the pump connecting port and is then supplied to the main heat exchanger, heating-water heated in the main heat exchanger passes through the three way valve and flows into the tank via the main heat exchanger connecting port, heating-water in the tank passes through the external circulation pump via the heating-water supplying port and is supplied to the heating equipment and then enters the tank via the heating-water returning port, some heating-water entered the tank via the heating-water returning port is supplied to the main heat exchanger via the pump connecting port, and the remainder of heating-water is mixed with heating-water entered the tank via the main heat exchanger connecting port and then supplied to the heating equipment via the heating-water supplying port.

7. The boiler having enhanced heating efficiency and enabling simultaneous use of heating and hot water of claim 1 , wherein, in the mode for simultaneous use of heating and hot water, the opening rate of the three way valve is adjusted in proportion to the heating load and the hot water load so that heating-water flowing from the main heat exchanger flows into the tank and the hot-water heat exchanger, heating-water in the tank passes through the internal circulation pump via the pump connecting port and is then supplied to the main heat exchanger, some heating-water heated in the main heat exchanger passes through the three way valve and flows into the tank via main heat exchanger connecting port, heating-water in the tank passes through the external circulation pump via the heating-water supplying port and is supplied to the heating equipment and is then enters the tank via the heating-water returning port, the remainder of heating-water heated in the main heat exchanger flows into the hot-water heat exchanger via the three way valve and is heat-exchanged with cold water and then flows into the tank via the heating-water inlet port, some heating-water entered the tank via the heating-water returning port and the heating-water inlet port is supplied to the main heat exchanger via the pump connecting port, and the remainder of heating-water is mixed with heating-water entered the tank via the main heat exchanger connecting port and then supplied to the heating equipment via the heating-water supplying port.

Assignees

• Kyungdong Navien Co Ltd

Inventors

• Min Tae-Sik

Classifications

• Y02E60/142

  Cross-Sectional Technologies · mapped topic

• F24H9/2007

  for water heaters · CPC title

• F24D19/1066

  for the combination of central heating and domestic hot water · CPC title

• F24H1/52

  incorporating heat exchangers for domestic water (F24H1/50 takes precedence) · CPC title

• F24D11/002 Primary

  water heating system · CPC title