Progress combi boilers

Abstract

A combi boiler (1) consisting of the burner (10) generating heat energy by burning combustible gas, main heat exchanger (20) transferring the heat energy given off by said burner (10) to water, heating unit (50) supplying hot water from said main heat exchanger (20) to the user environment, domestic water heat exchanger (30) heating the hot water from said main heat exchanger (20) for domestic water when domestic water is required, a directional control valve (40) which one of the outlet ports connected to said domestic water heat exchanger (30); the other of which is connected to said heating unit (50), which closes the outlet port to said heating unit (50) and opens the outlet port to said domestic water heat exchanger (30) when domestic water is required, characterised in that it comprises a domestic water heat exchanger (30) positioned at the outlet of said main heat exchanger (20), upstream of the inlet port of said directional control valve (40).

Description

[0001] PROGRESS COMBI BOILERS

[0002] Technical Field

[0003] The invention relates to a combi boiler which provides simultaneous heating and usage the hot water without the heating unit being deactivated by repositioning the heat exchangers in enclosed spaces such as homes and workplaces.

[0004] Previous Technical

[0005] In order to provide heating and / or hot water, combi boilers, a burner positioned to heat water and generating heat energy by combustion of a combustible gas is a heating system consisting of a main heat exchanger that transfers the heat energy given by the burner to water, a 3-way valve that controls the water at the outlet of the main heat exchanger according to the user demand, a flow sensor, a hot water heat exchanger that provides hot water for the user, a waste gas chimney where the burning gas in the burner is discharged, a circulation pump that circulates the water in the heating installation, an expansion tank that prevents the mechanical parts in the system from being damaged by the high pressure of the excess water formed by the expansion of the heated hot water volume in the combi boiler installation. In this heating system, one of the 3-way valve outlet ports is connected to the heating unit and the other to the hot water heat exchanger, and one of the heating or hot water lines is disabled according to the heating or hot water demand.

[0006] The combi boilers used in the present technique consist of the components mentioned above, and this system has some disadvantages in itself. Some of these are listed below:

[0007] • When the consumer wants to use domestic water while the radiators are running, the system is activated only for domestic water with the 3-way valve. The heaters switch off and the radiators continue to cool down during hot water use.

[0008] • Since the domestic water heat exchanger is cold during the transition to the hot water cycle, it takes time to heat up and therefore wasted water flows and water is wasted. There are some applications in national and foreign patent literature related to water saving in combi boilers.

[0009] In the patent research conducted regarding the existing technique; An application TR2018 / 04463 in respect of Bosch company was found. In this application, it is aimed to extend the effect on the pump life since the flow rate of the pump will increase suddenly with the hammer effect due to the sudden change of direction of the directional control valve (18) during the transition of the directional control valve (50) to the hot water supply state for domestic water while the heating unit (50) is in operation. As a second purpose; by configuring the directional control valve (18) and pump (19) with the control panel (40) and sensor (42), it is aimed to soften the transition instead of sudden shutdown and its effect on heat and comfort. But the main benefit of this design is the effect of extending the pump life.

[0010] With patent US2020309383; It is desired to create a ready-made hot water line by using 4 sensors (32,34,35,38) and bypass channel (36) between the cold water supply channel (30) and the hot water supply channel (30) and also by using 2 servo motors (33,37) and programming the hot water line with the control panel (40) and sensors.

[0011] This situation causes serious additional costs with 4 sensors, 2 servo motors, control panel, sensor and an additional bypass line, which are not available in existing combi boilers.

[0012] With patent CN111102741 in respect of Zhongshan company; It is aimed to solve the common problem with our design by using a circulation pump (4) which is not available in existing combi boilers for cold water in the middle of the water inlet pipe (3) of the bathroom, a new bypass line and 6 probe sensors (5,6,12,14,17,18) for temperature controls at the inlet and outlet of the line. This situation; 6 sensors that do not exist in existing combi boilers create extra costs with 1 circulation pump and an additional bypass line, (our designs in search of a solution to the same problem are not similar)

[0013] As a result, the existence of the above problems and the lack of an existing solution necessitated a development in the relevant technical field.

[0014] Purpose of the Invention The invention aims to solve the above-mentioned problems, to eliminate all disadvantages and to bring additional advantages to the structure.

[0015] The main purpose of the invention is to be able to supply both heating and hot water at the same time, when hot water is required, without any heat loss in the heating installation.

[0016] The benefit provided by the invention is that in the combi boiler, since the domestic water heat exchanger is always hot, when demanded, that is, when the water flow is provided, there is no loss of time and waste of water as in the combi boilers used in the existing technique for hot water waiting time.

[0017] Another benefit provided by the invention is that there is no need for a flow sensor since the heating line of the boiler has been revised.

[0018] Another benefit provided by the invention is that also retrenched of natural gas since there is no additional heat load on the main heat exchanger and the domestic water heat exchanger.

[0019] Another benefit provided by the invention is that the same parts (heat exchanger and 3-way valve) are used with the combi boilers in the existing technique without increasing the production costs (no costs such as new parts, new parts, new equipment to the existing parts), and the flow sensor in the existing combi boilers is removed from the installation line since the domestic water heat exchanger is connected to the outlet of the main heat exchanger.

[0020] In order to achieve the above-mentioned purposes with the invention, the above- mentioned purposes have been achieved by revising the domestic water heat exchanger, which is positioned at the outlet of the main heat exchanger, upstream of the inlet port of the directional control valve (3-way valve), and with this positioning, the heat energy to be given to the domestic water is kept ready for use and provides hot water without disabling the heating unit, wasting water and wasting time.

[0021] The structural and characteristic features, working principle and advantages of the invention will be more clearly understood by means of the figures given below and the detailed description written with references to these figures. Therefore, the evaluation should be made by taking these figures and detailed description into consideration. Brief Description of Figures

[0022] Figure 1 shows the operation of the combi boiler in heating mode.

[0023] Figure 2 shows the operation of the combi boiler in both heating and hot water mode.

[0024] Figure 3 shows the operation of the combi boiler in hot water mode.

[0025] Figure 4 shows the ports of the domestic water heat exchanger.

[0026] Reference Numbers

[0027] 1 . Combi boiler

[0028] 10. Burner

[0029] 11 . Combustible gas supply line

[0030] 12. Chimney

[0031] 13. Fan

[0032] 14. Combustible gas supply valve

[0033] 20. Main heat exchanger

[0034] 21 . Heating inlet port

[0035] 22. Heating outlet port

[0036] 23. Heating return line

[0037] 24. Heating supply line

[0038] 30. Domestic water heat exchanger

[0039] 31 . Hot water inlet port

[0040] 32. Hot water outlet port

[0041] 33. Domestic water inlet port 34. Domestic water outlet port

[0042] 35. Cold water line

[0043] 36. Hot water supply line

[0044] 40. Directional control valve

[0045] 41 . Bypass line

[0046] 50. Heating unit

[0047] 60. Circulation pump

[0048] 70. Safety valve

[0049] 80. Expansion tank

[0050] 90. Domestic water tap

[0051] Detailed Description of the Invention

[0052] Combi boiler (1 ) is a device used to meet the need for both heating and hot water use simultaneously in residences and workplaces, and in its most general form, it consists of burner (10), main heat exchanger (20), domestic water heat exchanger (30), directional control valve (40), heating unit (50), circulation pump (60), safety valve (70) and expansion tank (80).

[0053] The burner (10) is a device that generates heat energy by burning combustible gas oxygen and a combustible gas at a certain ignition temperature and provides heating of the water by transferring this heat energy to the water passing through the main heat exchanger (20). According to the capacity of the burner (10), there is a gas supply valve (14) that ensures the supply of combustible gas at a certain flow rate from the combustible gas supply line (11 ). Natural gas is generally used as combustible gas. The waste gas generated by the combustion of the combustible gas in the burner (10) is sucked by the fan (13) and discharged from the chimney (12).

[0054] The main heat exchanger (20) is a heat exchanger that creates a surface area for the transfer of heat energy from the burner (10) to the water, i.e. heat exchange, and in which the water circulates. There are 2 ports in the main heat exchanger (20) as heating inlet port (21 ) and heating outlet port (22). The heating return line (23), which returns from the heating unit (50), loses heat by giving some of the heat energy to the heated medium and its temperature decreases, enters the heating inlet port (21 ) of the main heat exchanger (20). The water entering from the heating inlet port (21 ) gains heat energy in the main heat exchanger (20) and hot water is supplied to the heating unit (50) with the heating supply line (24) from the heating outlet port (22).

[0055] The domestic water heat exchanger (30) is a plate type heat exchanger that creates a surface area for the transfer of heat energy in the hot water coming from the main heat exchanger (20) with the heating supply line (24) to the domestic water, i.e. heat exchange, and in which the water circulates. There are 4 ports in the domestic water heat exchanger (30) as hot water inlet port (31 ), hot water outlet port (32), domestic water inlet port (33) and domestic water outlet port (34). The domestic water heat exchanger (30) is connected to the heating outlet port (22) of the main heat exchanger (20) with the hot water inlet port (31 ) via the heating supply line (24) and connected to the inlet of the directional control valve (40) via the hot water outlet port (32). The heating supply line (24) to the heating unit (50) enters through the hot water inlet port (31 ) of the domestic water heat exchanger (30) and exits through the hot water outlet port (32). Meanwhile, heat energy is given to the water entering the domestic water inlet port (33) from the cold water line (35) of the domestic water heat exchanger (30) and the hot water leaving the domestic water outlet port (34) supplies hot water to the domestic water tap (90) located in places such as bathrooms and kitchens from the hot water supply line (36).

[0056] The directional control valve (40) is a 3-way valve that directs to the partially lost its heat hot water coming from the heating supply line (24) through the main heat exchanger (20) and domestic water heat exchanger (30) to the heating unit (50) or circulation pump (60) according to the usage mode of the combi boiler (1 ). The directional control valve (40) has 3 ports, 1 inlet and 2 outlet, the inlet port is connected to the main heat exchanger (20) and the domestic water heat exchanger (30), one of the outlet port is connected to the circulation pump (60) via the heating return line (23), and the other outlet port is connected to the heating unit (50).

[0057] The heating unit (50) is a heat exchanger which gives the energy of the water with heat energy, coming from the main heat exchanger (20) via the heating supply line, to the user environment. The water leaving the heating unit (50) and partially reduced heat energy enters the main heat exchanger (20) again with the heating return line (23). This situation continues with a cycle until the medium reaches the desired temperature. The heating unit (50) is a heating core in which water circulates.

[0058] The circulation pump (60) is the machine that enables the circulation of partially lost its heat hot water from the heating unit (50) or domestic water heat exchanger (30) in the closed circuit installation. The partially lost its heat water from the heating unit (50) is connected to the suction port of the circulation pump (60) via the heating return line (23).

[0059] The expansion tank (80) prevents the mechanical parts in the system from being damaged by the high pressure of the excess water formed by the expansion of the heated hot water volume in the heating installation. The expansion tank (80) is connected to the discharge line of the circulation pump (60).

[0060] Safety valve (70) is a one-way valve that prevents damage to the components in the heating installation when the water pressure in the heating installation rises excessively and reaches a certain pressure.

[0061] The domestic water tap (90) is a valve that provides hot water for the user in places such as kitchen and bathroom and sets the flow rate of the water.

[0062] The operating principle of the inventive combi boiler (1 ) operates in 3 different modes.

[0063] In the first mode, when only space heating is preferred, the operating principle of the combi boiler (1 ) is as follows: while the partially lost its heat water coming from the heating return line (23) is circulated by the circulation pump (60), this water first enters the main heat exchanger (20) and regains the heat energy lost and exits the main heat exchanger (20) as hot water. The water leaving the main heat exchanger (20) as hot water enters the hot water inlet port (31 ) of the domestic water heat exchanger (30) with the heating supply line (24) and exits from the hot water outlet port (32). In the meantime, there is no heat loss (because the domestic water is not running). The hot water coming out of the hot water outlet port (32) of the domestic water heat exchanger (30) is directed to the heating unit (50) by the directional control valve (40). The hot water entering the heating unit (50) transfers heat from the heating unit (50) to the user environment and goes back to the circulation pump through the heating return line (23). This cycle continues as long as the user only wants heating.

[0064] In the second mode, when both heating and domestic water is preferred, the operating principle of the combi boiler (1 ) is as follows: while the partially lost its heat water coming from the heating return line (23) is circulated by the circulation pump (60), this water first enters the main heat exchanger (20) and regains the heat energy it has lost and exits the main heat exchanger (20) as hot water. The water leaving the main heat exchanger (20) as hot water enters the hot water inlet port (31 ) of the domestic water heat exchanger (30) through the heating supply line (24) and exits through the hot water outlet port (32). In the meantime, the cold water coming from the cold water line (35) enters the domestic water inlet port (33) of the domestic water heat exchanger (30), circulates in the domestic water heat exchanger (30), partially takes the heat energy of the hot water coming from the main heat exchanger (20) and exits the domestic water outlet port (34) as hot water and supplies hot water to the domestic water taps (90) with the hot water supply line (36). The hot water exiting from the hot water outlet port (32) of the domestic water heat exchanger (30) goes to the heating unit (50) via the directional control valve (40).

[0065] In the third mode, when only domestic water is preferred, the operating principle of the combi boiler (1 ) is as follows, the directional control valve (40) changes position and connects the heating supply line (24) to the heating return line (23), the line to the heating unit (50) is closed and heating is carried out for domestic water in a different route. In this case, the hot water coming out of the main heat exchanger (20) circulates in the domestic water heat exchanger (30) and is connected to the heating return line (23). Meanwhile, the water coming from the cold water line (35) heats up in the domestic water heat exchanger (30) and is fed to the domestic water taps (90) from the hot water supply line (36). Thus, the heat energy to be supplied to the domestic water is ready to be utilised. While the water, which leaves the hot water outlet port (32) of the domestic water heat exchanger (30) and enters the heating return line (23) and partially lost heat energy, is circulated by the circulation pump (60), this water enters the main heat exchanger (20) and regains the heat energy it has lost and exits the main heat exchanger (20) as hot water. The hot water cycle continues in this way as long as domestic water is required.

[0066] With the combustion of natural gas, the first transfer point of heat is to have an always hot domestic water heat exchanger by positioning the domestic water heat exchanger (30) just after the main heat exchanger (20) and before the directional control valve (40).

[0067] Since the domestic water heat exchanger in existing combi boilers is designed on the bypass line (41 ) after the directional control valve, the user is forced to make a choice and the entire problem is experienced here.

[0068] With the inventive innovation; the domestic water heat exchanger is before the directional control valve, so that the position of the heat exchanger in our design can provide hot water at all times and does not prevent the heating system from heating while the domestic water is heating.

[0069] When the domestic water heat exchanger is positioned upwards, it is ready for use at any time by taking heat from the main heat exchanger. The directional control valve will determine the cycle according to the user's demand. When the heating unit (50) is requested, the directional control valve will close the bypass line (41 ) and provide circulation along the long line. If the heating unit is not requested, the circulation will be completed in the short cycle.

[0070] The task of the directional control valve (40) will be to determine the cycle according to the user's demand. The user will actually determine the position of the directional control valve (40) by selecting Summer and Winter mode in the combi boiler. Directional control valve (40); When the combi boiler is in Winter mode, since the heating unit (50) demand will occur, it will close the bypass line (41 ) and ensure the circulation of the circulation along the long line. In this case, there will be two heat exchangers ready both for the heating unit and for hot water use.

[0071] When the combi boiler is in Summer Mode, since the heating unit will not be demanded, it will provide the circulation through the bypass line (41 ) and will finish the io circulation in the short cycle. Thus, the domestic water heat exchanger (30) heated by the main heat exchanger (20) will be ready for hot water supply.

[0072] With its new task in our design, our directional control valve (40) does not need the water flow sensor that exists in existing combi boilers while determining the summer and winter mode of the combi boiler.

[0073] Thus; the user will be able to use the heating unit and domestic water at the same time in our design. There will be no waste of time and water for domestic water heating. It is also aimed to eliminate the heat loss in the radiators while the user is in the shower. Furthermore, in our design, it is aimed to provide comfort and efficiency without any additional cost by only changing the route with the parts in the existing combi boilers.

Claims

CLAIMS1. A combi boiler (1 ) consisting of a burner (10) generating heat energy by combustion of combustible gas, a main heat exchanger (20) transferring the heat energy given off by said burner (10) to water, a heating unit (50) supplying hot water from said main heat exchanger (20) to the user environment, a domestic water heat exchanger (30) heating the hot water from said main heat exchanger (20) for domestic water when domestic water is required, a directional control valve (40) which one of the outlet ports connected to said domestic water heat exchanger (30); the other of which is connected to said heating unit (50), which closes the outlet port to said heating unit (50) and opens the outlet port to said domestic water heat exchanger (30) when domestic water is required, characterised in that it comprises the following;• a domestic water heat exchanger (30) positioned at the outlet of said main heat exchanger (20), upstream of the inlet port of said directional control valve (40),• a directional control valve (40) which closes the bypass line (41 ) when the combi boiler (1 ) is in winter mode since there will be a demand for the heating unit (50) and enables the circulation to circulate along the long line, completes the circulation through the bypass line (41 ) since there will be no demand for the heating unit when the combi boiler is in summer mode, and determines the summer and winter mode without the need for the water flow sensor existing in existing combi boilers.

2. A combi boiler (1 ) according to claim 1 , characterised in that it comprises a domestic water heat exchanger (30) which keeps the heat energy to be supplied to the domestic water ready with the said positioning and provides hot water without the said heating unit (50) being deactivated, without wasting water and without wasting time.

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