Gas heating water heater capable of rapidly providing domestic hot water

Abstract

The utility model discloses a gas heating water heater capable of rapidly providing domestic hot water. The gas heating water heater comprises a main heat exchanger, an electric three-way valve, a water pump and a heat exchange water storage tank. The electric three-way valve is provided with a heating water inlet end, a heating water outlet end, a bathroom heat exchange water inlet end and a domestic hot water outlet end; the water pump is provided with a heating water return end, a tap water inlet end and a bathroom heat exchange water outlet end; the heat exchange water storage tank is provided with a water storage heat exchange part and a heat exchange coil pipe; the water pump, the main heat exchanger, the heating water inlet end, the bathroom heat exchange water inlet end, the heat exchange coil and the bathroom heat exchange water outlet end are connected to form heat exchange circulation. According to the water heater, the heat exchange water storage tank with heat storage and heat exchange functions is used for replacing a traditional plate heat exchanger, water stored in the heat exchange water storage tank is heated through heat exchange circulation so that the water can be kept at a certain temperature, when bathroom water needs to be used, hot water can be directly discharged, the time for producing domestic hot water can be greatly shortened, and the energy consumption is reduced. The comfort of domestic hot water of the heating stove is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of wall-hung boilers, and particularly relates to a gas heating and hot water boiler with the function of quickly providing domestic hot water. Background Art

[0002] A gas heating and hot water boiler, abbreviated as a wall-hung boiler, is mainly used for winter heating and domestic hot water. With the promotion of the national coal-to-gas project, gas heating and hot water boilers have been widely used and popularized. A gas heating and hot water boiler mainly consists of control, combustion, and heat exchange systems. It uses natural gas as fuel, and transfers the heat generated by combustion to the circulating water of the system through the heat exchange system to provide domestic hot water and heating heat for users.

[0003] At present, the domestic hot water heating method used in market heating boilers mainly adopts heat exchange between tap water and system water through a plate heat exchanger. Since the plate heat exchanger is composed of multiple layers of heat exchange fins stacked together, it cannot store hot water and can only perform heat exchange. Therefore, when using domestic hot water in a heating boiler, it takes a period of time to wait for hot water to come out from the start of the heating boiler, and stable hot water cannot be generated immediately. When applied to a condensing boiler model, due to the longer coil of the main heat exchanger of the condensing boiler, the waiting time for stable hot water will be longer, resulting in poor user experience and wasting water resources. Moreover, the gap between the layers of heat exchange fins of the plate heat exchanger is small, and it is also easy to block the heat exchange channels of the plate heat exchanger, reducing the heat exchange efficiency of domestic hot water. Content of the Utility Model

[0004] In order to overcome the deficiencies of the prior art, the utility model provides a gas heating and hot water boiler with the function of quickly providing domestic hot water, solving the above-mentioned traditional problems. It adopts a heat exchange and water storage tank with heat storage and heat exchange functions to replace the plate heat exchanger, solving the traditional problems of long waiting time when using domestic hot water in a heating boiler and easy blockage of the plate heat exchanger.

[0005] The utility model is realized by adopting the following technical solutions:

[0006] A gas heating and hot water boiler with the function of quickly providing domestic hot water, which is used to be connected with a heating terminal and a bathroom terminal. The gas heating and hot water boiler includes a housing, a fully premixed burner, a main heat exchanger, a condensate trap, a fan, a premixer, a gas valve, an electric three-way valve, a water pump, and a heat exchange and water storage tank installed in the housing;

[0007] The electric three-way valve is integrated with a water outlet valve, and the water outlet valve is provided with a heating water inlet end, a heating water outlet end, a heat exchange water inlet end for bathroom use, and a domestic hot water outlet end; the water pump is integrated with a water inlet valve, and the water inlet valve is provided with a heating water return end, a tap water inlet end, and a heat exchange water outlet end for bathroom use; the heat exchange and water storage tank has a water storage and heat exchange part with a peripherally annular bulge, and a heat exchange coil is arranged in the water storage and heat exchange part;

[0008] The water pump, the main heat exchanger, the heating water inlet end, the heating water outlet end, and the heating terminal are connected to form a heating cycle; the water pump, the main heat exchanger, the heating water inlet end, the domestic hot water heat exchange water inlet end, the heat exchange coil, and the domestic hot water heat exchange water outlet end are connected to form a heat exchange cycle; the tap water inlet end, the inner cavity of the water storage heat exchange part, the domestic hot water outlet end, and the bathroom terminal are connected to form a domestic hot water supply system for the bathroom.

[0009] Preferably, the water storage heat exchange part is provided with a first convex bump and a second convex bump. The water outlet valve is installed on the first convex bump, and the water inlet valve is installed on the second convex bump; the first convex bump is provided with a first connection port and a second connection port. The first connection port is communicated with the domestic hot water heat exchange water inlet end, and the second connection port is communicated with the domestic hot water outlet end; the second convex bump is provided with a third connection port and a fourth connection port. The third connection port is communicated with the tap water inlet end, and the fourth connection port is communicated with the domestic hot water heat exchange water outlet end.

[0010] Preferably, a first type of welded nut column is welded on the first convex bump. The water outlet valve and the first convex bump are fixedly positioned through the first type of welded nut column; a second type of welded nut column is welded on the second convex bump. The water inlet valve and the second convex bump are fixedly positioned through the second type of welded nut column.

[0011] Preferably, a partition plate is further arranged in the water storage heat exchange part. The partition plate divides the inner cavity of the water storage heat exchange part into a preheating end and a heating end. The preheating end is communicated with the third connection port, and the heating end is communicated with the second connection port.

[0012] Preferably, an arched water tank support frame is arranged on the inner wall of the outer shell. The heat exchange water storage tank is provided with an inner concave part. The inner concave part and the water tank support frame are fixedly positioned through bolts.

[0013] Preferably, the heat exchange water storage tank is further provided with a mounting base and a water tank NTC. The water storage heat exchange part is provided with a mounting hole. The mounting base is welded on the mounting hole. The mounting base and the mounting hole cooperate to be used for mounting the water tank NTC.

[0014] Preferably, the gas-fired heating hot water boiler further includes an outlet NTC, a return water NTC, and a water flow sensor. The outlet NTC is installed on the pipeline between the electric three-way valve and the main heat exchanger. The return water NTC is installed on the pipeline between the water pump and the main heat exchanger. The water flow sensor is installed on the water inlet valve and is used for detecting the water flow condition of the tap water inlet end.

[0015] Preferably, the gas-fired heating and hot water boiler further includes a heating return water joint, a heating outlet water joint, a domestic hot water outlet joint and a tap water inlet joint. The heating return water joint is connected to the heating return water end, the heating outlet water joint is connected to the heating outlet water end, the domestic hot water outlet joint is connected to the domestic hot water outlet end, and the tap water inlet joint is connected to the tap water inlet end.

[0016] Preferably, the heat exchange coil is in a spiral ring shape structure.

[0017] Preferably, a plurality of fins are further provided on the heat exchange coil, and the fins are evenly distributed.

[0018] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0019] The gas-fired heating and hot water boiler of the present utility model that can quickly provide domestic hot water replaces the traditional plate heat exchanger with a heat exchange and water storage tank having heat storage and heat exchange functions. The water stored in the heat exchange and water storage tank is heated through a heat exchange cycle to keep it at a certain temperature. When domestic hot water is needed, hot water can be directly output, which can greatly shorten the time for generating domestic hot water and improve the comfort of the domestic hot water of the heating boiler, so as to solve the traditional problems of long waiting time when using domestic hot water in the heating boiler and easy blockage of the plate heat exchanger. Description of the Drawings

[0020] Figure 1 is a schematic internal structure diagram of the gas-fired heating and hot water boiler of the present utility model;

[0021] Figure 2 is Figure 1 a partial exploded view of the gas-fired heating and hot water boiler shown;

[0022] Figure 3 is Figure 1 a schematic flow connection diagram of the gas-fired heating and hot water boiler shown.

[0023] In the figure: 10, housing; 20, main heat exchanger; 30, electric three-way valve; 40, water pump; 50, heat exchange and water storage tank; 51, water storage and heat exchange part; 510, first convex bump; 511, second convex bump; 512, first type of welded nut post; 513, second type of welded nut post; 52, heat exchange coil; 53, partition plate; 54, water tank NTC; 60, outlet NTC; 70, return water NTC. Detailed Embodiments

[0024] To make the above objects, features, and advantages of the present utility model more apparent and understandable, the following describes the specific embodiments of the present utility model in detail with reference to the accompanying drawings. Many specific details are set forth in the following description to fully understand the present utility model. However, the present utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present utility model. Therefore, the present utility model is not limited by the specific embodiments disclosed below.

[0025] In the description of the present utility model, it should be understood that the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0026] In the description of the present utility model, it should be understood that when an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be intermediate elements present simultaneously. In contrast, when an element is referred to as being "directly" connected to another element, there are no intermediate elements.

[0027] Please refer to Figures 1-3 , which is a gas-fired heating and hot water boiler of a preferred embodiment of the present utility model. By adopting a heat exchange and water storage tank 50 with heat storage and heat exchange functions to replace the plate heat exchanger solution, it has the effect of quickly providing domestic hot water and is used to connect to the heating end and the bathroom end. Specifically, the gas-fired heating and hot water boiler includes a housing 10, a fully premixed burner installed in the housing 10, a main heat exchanger 20, a condensate trap, a blower, a premixer, a gas valve, an electric three-way valve 30, a water pump 40, a heat exchange and water storage tank 50, and a control system.

[0028] The fully premixed burner is connected to the blower, the premixer, and the gas valve. Through the action of the blower, gas and air are drawn into the burner for ignition and combustion. The condensate trap is connected to the drain pipe at the bottom of the fully premixed burner, and is used to receive the condensate water condensed after the high-temperature flue gas in the fully premixed burner exchanges heat with the main heat exchanger 20, and performs water sealing in the condensate trap, which can prevent the flue gas from leaking from the water seal.

[0029] The electric three-way valve 30 is integrated with a water outlet valve, and the water outlet valve is provided with a heating water inlet end, a heating water outlet end, a heat exchange water inlet end for bathroom heating, and a domestic hot water outlet end; the water pump 40 is integrated with a water inlet valve, and the water inlet valve is provided with a heating water return end, a tap water inlet end, and a heat exchange water outlet end for bathroom heating. Through the function of the above integrated valves, it can be switched better to quickly realize the operation of each system. The heat exchange water storage tank 50 has a water storage and heat exchange part 51 with a peripherally annular bulge for storing water and heat exchange. A heat exchange coil 52 is arranged in the water storage and heat exchange part 51; the water pump 40, the main heat exchanger 20, the heating water inlet end, the heating water outlet end, and the heating terminal are connected to form a heating cycle; the water pump 40, the main heat exchanger 20, the heating water inlet end, the heat exchange water inlet end for bathroom heating, the heat exchange coil 52, and the heat exchange water outlet end for bathroom heating are connected to form a heat exchange cycle; the tap water inlet end, the inner cavity of the water storage and heat exchange part 51, the domestic hot water outlet end, and the bathroom terminal are connected to form a hot water supply system for bathroom heating.

[0030] In one embodiment, the water storage and heat exchange part 51 is provided with a first convex bump 510 and a second convex bump 511. The water outlet valve is installed on the first convex bump 510, and the water inlet valve is installed on the second convex bump 511; the first convex bump 510 is provided with a first connection port and a second connection port. The first connection port is communicated with the heat exchange water inlet end for bathroom heating, and the second connection port is communicated with the domestic hot water outlet end; the second convex bump 511 is provided with a third connection port and a fourth connection port. The third connection port is communicated with the tap water inlet end, and the fourth connection port is communicated with the heat exchange water outlet end for bathroom heating. Through the above convex bump structure setting, it is convenient for the heat exchange water storage tank 50 to be docked with the water outlet valve and the water inlet valve, and it is convenient for the sealing between the connection ports and the valves. Preferably, a gasket is provided for the connection between each connection port and the valve.

[0031] Optionally, a first type of welded nut post 512 is welded on the first convex bump 510, and the water outlet valve and the first convex bump 510 are fixed and positioned through the first type of welded nut post 512; a second type of welded nut post 513 is welded on the second convex bump 511, and the water inlet valve and the second convex bump 511 are fixed and positioned through the second type of welded nut post 513.

[0032] In some other embodiments, a partition plate 53 is further arranged in the water storage and heat exchange part 51. The partition plate 53 divides the inner cavity of the water storage and heat exchange part 51 into a preheating end and a heating end. The preheating end is communicated with the third connection port, and the heating end is communicated with the second connection port, avoiding the tap water from directly flowing out from the domestic hot water outlet after coming in. The heated heating hot water in the system heats the tap water in the water storage and heat exchange part 51 of the housing through the heat exchange coil 52. The flowing direction of the tap water is set to be countercurrent to the flowing direction of the heating hot water, which can effectively maintain the stability of the inlet and outlet water temperatures to improve the heat exchange efficiency between the two.

[0033] Such as Figure 2As shown, in order to improve the installation stability of the heat exchange water storage tank 50, a water tank support frame in an arch shape is provided on the inner wall of the outer shell 10. The heat exchange water storage tank 50 is provided with an inner concave portion, and the inner concave portion and the water tank support frame are fixed and positioned by bolts.

[0034] In some other embodiments, the heat exchange coil 52 has a spiral ring-shaped structure to buffer the system water therein. On the one hand, it can increase the heat exchange area and improve the heat exchange efficiency. On the other hand, it can extend the residence time of the system water in the shell. Optionally, a number of fins (not shown in the figure) are also provided on the heat exchange coil 52, and the fins are evenly distributed to further improve the heat exchange efficiency of the coil.

[0035] As Figure 3 shown, in order to improve the acquisition and automation of information, the heat exchange water storage tank 50 is also provided with a mounting base and a water tank NTC 54. The water storage and heat exchange part 51 is provided with a mounting hole, and the mounting base is welded to the mounting hole. The mounting base and the mounting hole cooperate to install the water tank NTC 54. When the water tank temperature is lower than the set temperature, the water tank heating will be preferentially started, and the required domestic hot water can be provided in time and preferentially. The gas heating hot water boiler also includes an outlet NTC 60, a return water NTC 70 and a water flow sensor. The outlet NTC 60 is installed on the pipeline between the electric three-way valve 30 and the main heat exchanger 20. The return water NTC 70 is installed on the pipeline between the water pump 40 and the main heat exchanger 20. The water flow sensor is installed on the inlet valve to detect the water flow condition at the tap water inlet end. The control system is electrically connected to the outlet NTC 60, the return water NTC 70, the water flow sensor and the water tank NTC 54 respectively to receive the feedback information and make processing according to the program.

[0036] The gas heating hot water boiler also includes a heating return water joint, a heating outlet water joint, a domestic hot water outlet joint and a tap water inlet joint. The heating return water joint is connected to the heating return water end, the heating outlet water joint is connected to the heating outlet end, the domestic hot water outlet joint is connected to the domestic hot water outlet end, and the tap water inlet joint is connected to the tap water inlet end.

[0037] In the above embodiments, the outer shell 10 is formed by die stamping, and the materials used are 304 stainless steel / copper and other materials. The connection gaps of the outer shell 10 can be welded and sealed by brazing to form a complete sealed cavity. The heat exchange coil 52 is made of 304 stainless steel / copper and other materials.

[0038] Its working principle is as follows: When the water tank NTC54 detects that the water temperature is lower than the set temperature or the water flow sensor detects the demand for domestic hot water; the heating furnace turns on the domestic hot water heating mode, and the three-way motor switches to the domestic hot water mode. The main heat exchanger 20 heats the system water, and the circulation is carried out through the water pump 40; the system water enters the coil of the water storage tank from the heating outlet pipe of the main heat exchanger 20 to heat the water in the water storage tank through the coil, and then flows through the water outlet of the water tank coil, passes through the water pump 40 and returns to the main heat exchange system for circulation; when the user uses domestic hot water, there is always hot water supply in the water tank, which can immediately provide hot water without waiting for the heating process, and the discharged section is cold water; after starting the domestic hot water, the system will start the circulating water to heat the water tank so that the temperature of the water in the water tank meets the set temperature requirement, continuously heat the domestic hot water, and ensure the continuous supply of hot water.

[0039] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0040] The above-described embodiments only represent several implementation manners of the present invention. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the utility model patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the utility model patent shall be subject to the appended claims.

Claims

1. A gas heating water heater capable of quickly providing domestic hot water, used to be connected to a heating terminal and a bathroom terminal, characterized in that: The gas heating water heater comprises a shell, a fully premixed burner installed in the shell, a main heat exchanger, a condensing water seal, a fan, a premixer, a gas valve, an electric three-way valve, a water pump and a heat exchange water storage tank; The electric three-way valve is integrated with a water outlet valve, and the water outlet valve is provided with a heating water inlet end, a heating water outlet end, a bathroom heat exchange water inlet end and a domestic hot water outlet end; the water pump is integrated with a water inlet valve, and the water inlet valve is provided with a heating return water end, a tap water inlet end and a bathroom heat exchange water outlet end; the heat exchange water storage tank has a water storage and heat exchange part with a circular bulge on the outer periphery, and a heat exchange coil is provided in the water storage and heat exchange part; The water pump, the main heat exchanger, the heating water inlet, the heating water outlet, and the heating terminal are connected to form a heating cycle; the water pump, the main heat exchanger, the heating water inlet, the bathroom heat exchange water inlet, the heat exchange coil, and the bathroom heat exchange water outlet are connected to form a heat exchange cycle; the tap water inlet, the inner cavity of the water storage and heat exchange part, the domestic hot water outlet, and the bathroom terminal are connected to form a bathroom hot water supply system.

2. The gas-fired hot water heater capable of quickly providing domestic hot water according to claim 1, characterized in that: The water storage and heat exchange part is provided with a first convex hump and a second convex hump, the water outlet valve is installed on the first convex hump, and the water inlet valve is installed on the second convex hump; the first convex hump is provided with a first connecting port and a second connecting port, the first connecting port is connected to the water inlet end of the bathroom heat exchange, and the second connecting port is connected to the water outlet end of the domestic hot water; the second convex hump is provided with a third connecting port and a fourth connecting port, the third connecting port is connected to the tap water inlet end, and the fourth connecting port is connected to the water outlet end of the bathroom heat exchange.

3. The gas-fired hot water heater capable of quickly providing domestic hot water according to claim 2, characterized in that: A first type of weld nut column is welded on the first convex bump, and the water outlet valve and the first convex bump are fixedly positioned by the first type of weld nut column; a second type of weld nut column is welded on the second convex bump, and the water inlet valve and the second convex bump are fixedly positioned by the second type of weld nut column.

4. The gas-fired hot water heater capable of quickly providing domestic hot water according to claim 2, characterized in that: A partition plate is also provided in the water storage and heat exchange part, and the partition plate divides the inner cavity of the water storage and heat exchange part into a preheating end and a heating end. The preheating end is connected to the third connecting port, and the heating end is connected to the second connecting port.

5. The gas-fired hot water heater capable of quickly providing domestic hot water according to claim 1, characterized in that: The inner wall of the shell is provided with a water tank support frame arranged in an arch shape, and the heat exchange water storage tank is provided with an inner recessed portion, and the inner recessed portion and the water tank support frame are fixed and positioned by bolts.

6. The gas-fired hot water heater capable of quickly providing domestic hot water according to claim 1, characterized in that: The heat exchange water storage tank is also provided with a mounting base and a water tank NTC. The water storage heat exchange part is provided with a mounting hole. The mounting base is welded on the mounting hole. The mounting base cooperates with the mounting hole to install the water tank NTC.

7. The gas-fired hot water heater capable of quickly providing domestic hot water according to claim 1, characterized in that: The gas heating hot water boiler also includes an outlet water NTC, a return water NTC and a water flow sensor. The outlet water NTC is installed on the pipeline between the electric three-way valve and the main heat exchanger, and the return water NTC is installed on the pipeline between the water pump and the main heat exchanger. The water flow sensor is installed on the water inlet valve to detect the water flow at the tap water inlet end.

8. The gas-fired hot water heater capable of quickly providing domestic hot water according to claim 1, characterized in that: The gas heating hot water boiler also includes a heating return water joint, a heating water outlet joint, a domestic hot water outlet joint and a tap water inlet joint. The heating return water joint is connected to the heating return water end, the heating water outlet joint is connected to the heating water outlet end, the domestic hot water outlet joint is connected to the domestic hot water outlet end, and the tap water inlet joint is connected to the tap water inlet end.

9. The gas-fired hot water heater capable of quickly providing domestic hot water according to claim 1, characterized in that: The heat exchange coil is in a spiral ring structure.

10. The gas-fired hot water heater capable of quickly providing domestic hot water according to claim 9, characterized in that: The heat exchange coil is also provided with a plurality of fins, and the fins are evenly distributed.

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