CN112032996A - Gas heating installations and heating and hot water systems - Google Patents

Abstract

The invention discloses a gas heating device and a heating and hot water supply system. A gas heating device, including: a gas stove is equipped with a general water outlet and a general water inlet, the gas stove is used to burn gas to heat the water input from the general water inlet and output hot water from the general water outlet; the heating component is configured with a heating water outlet pipe and a heating Return water pipe; the hot water supply component is equipped with cold water inlet pipe, zero cold water return pipe, water tank and water pump, and the water tank has a hot water outlet and a circulating water inlet; the water outlet switching valve is used to connect the circulating water inlet and heating water outlet to the main water outlet respectively. Connection; the outlet switch valve is used to connect the cold water inlet pipe, zero cold return pipe and heating return pipe to the main water inlet respectively; the circulating pump is connected between the water inlet switch valve and the main water inlet. The water in the external water pipe is heated or buffered by the water tank, so as to reduce the number of start and stop of the gas furnace and reduce the fluctuation of the outlet water temperature, save the gas consumption and improve the user experience of water use.

Description

Gas heating installations and heating and hot water systems

technical field

The invention belongs to the technical field of heating furnaces, and in particular relates to a gas heating device and a heating and hot water supply system.

Background technique

At present, gas heating devices use gas as energy to heat water to achieve heating, and with the advancement of technology, gas heating devices can also have the function of supplying domestic hot water to users. For example: Chinese Patent Application No. 201811537311.6 discloses a zero-cold water gas-fired wall-hung boiler system, which on the one hand can meet the heating requirements in the room, and on the other hand, can also achieve zero-cold water supply of hot water. However, in the actual use process, in order to achieve zero cold water, the cold water in the water outlet pipe needs to be transported from the return pipe to the gas furnace through the water pump for heating, and then re-transmitted to the water outlet pipe. However, due to the small amount of water stored in the water outlet pipe, when the gas furnace is burned and heated, the heat generated by the combustion heating is far greater than the requirement of the stored water amount due to the influence of the minimum heating power of the gas furnace, and the start and stop of the gas furnace burner It is controlled by detecting whether the heating temperature reaches the set value. In the actual use process, in order to maintain the temperature of the water in the water pipe, the water in the pipe needs to be heated. When the water temperature reaches the preset temperature, the machine does not work. When the water temperature is lower than the preset water temperature, it needs to be re-ignited and heated. , the water pump restarts operation, causing the machine to start repeatedly, which will affect the life of the gas furnace, and frequent starts will cause a waste of gas; because the zero cold water volume is small, when using combustion heating, the temperature is easy to overheat, and the user may be in the process of use. The temperature of the zero cold water is quite different from the temperature to be used (hot and cold), resulting in an uncomfortable water experience. How to design a technology that saves gas consumption and improves user experience with water is the technical problem to be solved by the present invention.

SUMMARY OF THE INVENTION

Aiming at the technical problems existing in the prior art, the present invention provides a gas heating device and a heating and hot water supply system. During the zero cold water heating process, the water tank is used to heat or buffer the water stored in the external water pipe, so as to reduce the start-up of the gas furnace. The number of stops and the fluctuation of the outlet water temperature are reduced, the gas consumption is saved and the user experience of water use is improved.

In order to realize the above-mentioned purpose of the invention, the present invention adopts the following technical scheme to realize:

The invention provides a gas heating device, comprising:

a gas stove, the gas stove is equipped with a general water outlet and a general water inlet, and the gas stove is used for burning gas to heat the water input from the general water inlet and output hot water from the general water outlet;

a heating component, the heating component is configured with a heating water outlet pipe and a heating water return pipe;

A hot water supply assembly, the hot water supply assembly is configured with a cold water inlet pipe, a zero-cold return water pipe, a water tank and a water pump, and the water tank has a hot water outlet and a circulating water inlet;

a water outlet switching valve, which is used to connect the circulating water inlet and the heating water outlet pipe to the total water outlet respectively;

a water inlet switching valve, the water outlet switching valve is used to connect the cold water inlet pipe, the zero-cold return water pipe and the heating return water pipe to the main water inlet respectively;

a circulating pump, which is connected between the water inlet switching valve and the general water inlet.

Further, a one-way valve is also provided on the zero-cold return water pipe, and the water flowing through the zero-cold return water pipe flows to the water inlet switching valve through the one-way valve.

Further, the water tank further has a water inlet and outlet, the water inlet and outlet are connected with the cold water inlet pipe, and the water inlet and outlet are also connected with the general water inlet through the water inlet switching valve.

Further, the water tank includes:

an insulation tank, wherein a water storage cavity is formed inside the insulation tank;

a hot water outlet pipe, the hot water outlet pipe is inserted into the heat preservation tank, and the hot water outlet is formed by a nozzle of the hot water outlet pipe located outside the heat preservation tank;

a circulating water pipe, the circulating water pipe is inserted into the inside of the thermal insulation tank, and the nozzle of the circulating water pipe located outside the thermal insulation tank forms the circulating water inlet;

The water inlet and outlet pipes are inserted into the inside of the thermal insulation tank, and the nozzles of the water inlet and outlet pipes located outside the thermal insulation tank form the water inlet and outlet ports.

Further, the bottom of the heat preservation tank is provided with an installation port; the water tank further includes a sealing cover, and the sealing cover is sealingly connected to the installation port, the hot water outlet pipe, the circulating water pipe and the water inlet and outlet pipes A seal extends through the sealing cover.

Further, the hot water outlet pipe, the circulating water pipe and the water inlet and outlet pipes are arranged vertically.

Further, the upper end of the circulating water pipe is a closed structure, and a plurality of water outlet holes are opened on the pipe wall of the upper end of the circulating water pipe.

Further, the upper end of the hot water outlet pipe is an open structure and forms a hot water inlet, and the height of the hot water inlet is higher than the height of the water outlet.

Further, the upper ends of the water inlet and outlet pipes are of a closed structure, and the pipe walls of the upper ends of the water inlet and outlet pipes are provided with a plurality of water passage holes, and the height of the water passage holes is lower than the height of the water outlet holes.

The present invention provides a heating and hot water supply system, which includes a hot water output terminal and a heat dissipation terminal, and also includes the above-mentioned gas heating device; the hot water outlet of the gas heating device is connected to the hot water output terminal through a water supply pipe, and the hot water output terminal is The water supply pipe is also connected to the zero cooling water return pipe of the gas heating device through a water return pipe; the heating water outlet pipe and the heating water return pipe of the gas heating device are respectively connected to the corresponding connection ports of the heat dissipation terminal.

Compared with the prior art, the advantages and positive effects of the present invention are: by adding a water tank, the hot water outlet configured on the water tank is used to transport hot water for domestic use to the outside, and when zero cold water is heated, the water in the external water pipe passes through the water tank. The zero-cold return water pipe enters the circulating water inlet, so that the water in the external water pipe is mixed with the hot water stored in the water tank, which can reduce the number of times the gas furnace is switched on and off, save the gas consumption and improve the service life; and store water in the water tank In the case where the temperature of the water supply cannot be met, and when the zero cold water is heated, the water in the external water pipe is transported through the zero cold return pipe and heated by the gas furnace, and then enters the water tank and mixes with the water in the water tank, so as to use the water in the water tank to Buffer the water temperature fluctuation during the heating process of zero cold water, prevent the water temperature from rising too high, and improve the user experience.

Other features and advantages of the present invention will become more apparent after reading the detailed description of the present invention in conjunction with the accompanying drawings.

Description of drawings

In order to illustrate the technical solutions in the embodiments of the present invention more clearly, the following briefly introduces the accompanying drawings used in the embodiments. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained from these drawings without any creative effort.

Fig. 1 is a schematic diagram of the structural principle of the embodiment of the gas heating device of the present invention;

Figure 2 is a schematic structural diagram of a water tank in an embodiment of the gas heating device of the present invention;

Fig. 3 is a schematic structural diagram of the water inlet and outlet pipe groups in the embodiment of the gas heating device of the present invention.

Detailed ways

In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

It should be noted that, in the description of the present invention, the terms "up", "down", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate directions or positions The terminology of the relationship is based on the direction or positional relationship shown in the drawings, which is only for the convenience of description, and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as Limitations of the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed to indicate or imply relative importance.

As shown in FIGS. 1-3 , the gas heating device in this embodiment includes: a gas furnace 1 , a heating assembly 2 , a hot water supply assembly 3 , a water outlet switching valve 5 and a water inlet switching valve 6 .

The gas furnace 1 is equipped with a general water outlet 11 and a general water inlet 12 , and the gas stove 1 is used for burning gas to heat the water input from the general water inlet 12 and output hot water from the general water outlet 11 . The gas furnace 1 is usually also equipped with components such as a burner 13, a heat exchanger 14, etc. The input from the general water inlet 12 enters the heat exchanger 14, and the burner 13 can heat the water in the heat exchanger 14 by burning gas. , the water heated by the heat exchanger 14 is output through the total water outlet 11 . Here, the specific structural form of the gas furnace 1 will not be described in detail.

The heating assembly 2 is provided with a heating water outlet pipe 21 and a heating water return pipe 22 . Specifically, the heating water outlet pipe 21 is used to transport the hot water output from the main water outlet 11 to the heat dissipation terminal (for example, a floor heating pipe or a radiator) configured in the user's room, and the water output from the heat dissipation terminal flows through the heating return pipe 22 Back in the heat exchanger 14 .

The hot water supply assembly 3 is configured with a cold water inlet pipe 31 , a zero cold water return pipe 32 and a water tank 33 having a hot water outlet (not marked) and a circulating water inlet (not marked). Specifically, the cold water inlet pipe 31 can be connected to an external water supply source (for example, a tap water pipe), the water tank 33 outputs hot water through the hot water outlet, and the hot water is delivered to the hot water output terminal (for example, bathing) through the water supply pipe configured in the user's home Shower or hot water tap, etc.). The return water pipe connected with the water supply pipe for realizing the zero cold water function is connected with the zero cold water return pipe 32. For the specific connection method of the water supply pipe and the return water pipe, refer to the gas hot water equipment with zero cold water function in the conventional technology, here Do not limit and repeat.

The water outlet switching valve is used to connect the circulating water inlet and the heating water outlet pipe 21 to the general water outlet 11 respectively.

The water outlet switching valve is used to connect the cold water inlet pipe 31 , the zero cold water return pipe 32 and the heating water return pipe 22 to the main water inlet 12 respectively. The functions of the water outlet switching valve 5 and the water outlet switching valve 6 are to switch the communication of different water paths, and the concrete manifestation can be realized by using a multi-position multi-way valve or a plurality of independent electronically controlled valves, which will not be limited and described here.

The circulating pump is connected between the water inlet switching valve and the total water inlet, and the circulating pump can drive the circulating flow of heating water on the one hand, and can drive the circulating flow of domestic hot water on the other hand.

Specifically, in the actual use process, regarding the specific process of heating water for the gas furnace 1 to supply the heating component 2 to output hot water, reference is made to the conventional gas heating furnace, which will not be limited or described here. In the process of heating the user's domestic water by the gas furnace 1, the specific process is as follows:

In zero cold water mode, when the water temperature in the water supply pipe is lower than the set temperature, the zero cold water heating function is activated. At this time, the water outlet switching valve 5 switches the main water outlet 11 and the circulating water inlet, and the water inlet switching valve 6 switches the zero cooling return. The water pipe 32 communicates with the general water inlet 12 . When the zero cold water is heated, the water temperature of the water tank 33 is detected first. If the water temperature of the water tank 33 is greater than the water temperature in the water supply pipe, under the action of the circulating pump 4, the water in the water supply pipe passes through the zero cooling return pipe 32 and the heat exchanger 14. Circulating flow is carried out in the water tank 33 until the water temperature in the water supply pipe reaches the set temperature. During this process, if the temperature of the water tank is lower than the start-up temperature of the gas furnace 1, the gas furnace 1 is started, and the heat exchanger 14 will heat the flow. water to achieve heating of the water in the water tank 33 . And when the water temperature of the water tank 33 is not greater than the water temperature in the water supply pipe, the gas furnace 1 is started, and the heat exchanger 14 will heat the flowing water to achieve heating the water in the water tank 33 .

Preferably, the water tank 33 also has a water inlet and outlet (not marked), the water inlet and outlet communicate with the cold water inlet pipe 31 , and the water inlet and outlet are also connected to the general water inlet through the water inlet switching valve 6 . Specifically, the water inlet and outlet can realize that the water output by the cold water inlet pipe 31 enters the water tank 33 , and can also realize that the water in the water tank 33 is sucked out by the circulating pump 4 to circulate and flow. In the process of heating the user's domestic water, the gas furnace 1 further includes: a water tank water supply mode. In the water tank water supply mode, if the temperature sensor in the water tank 33 detects that the water tank 33 is higher than the set temperature, when the user uses hot water, the circulating pump 4 stops working, and the cold water output from the cold water inlet pipe 31 directly enters the water tank 33, and the The hot water in the water tank 33 is squeezed out, and the hot water is output from the hot water outlet. In the process of using water, when the temperature sensor in the water tank 33 detects that the water tank 33 is lower than the set temperature, the heating process is started. At this time, the water inlet switching valve 6 switches the cold water inlet pipe 31 and the water inlet and outlet to communicate with the inlet of the circulating pump 4 . When the gas furnace 1 is started, when the user continues to use water, the water output by the cold water inlet pipe 31 is sucked into the heat exchanger 14 by the circulating pump 4 for heating, and then enters the water tank 33 and is output from the hot water outlet to realize instant water supply. When the user does not need hot water, the cold water inlet pipe 31 is closed, the gas furnace 1 is started, and under the action of the circulating pump 4, the water in the water tank 33 is transported to the heat exchanger 14 to be heated and then returned to the water tank 33 until the water tank 33 After the water in the water reaches the set temperature, the combustion and heating are stopped, the whole machine enters the standby state, and the water tank is kept warm at the same time. When the water temperature of the water tank 33 is lower than the set temperature -ΔT next time, it will start again.

Further, in order to maximize the use of the hot water in the water tank 33, the water tank 33 includes: a thermal insulation tank 331, a hot water outlet pipe 332, a circulating water pipe 333 and a water inlet and outlet pipe 334, and a water storage cavity is formed inside the thermal insulation tank 331; The pipe 332 is inserted into the heat preservation tank 331 and is used to output the water in the upper area of the water storage cavity. The outlet of the hot water pipe 332 located outside the heat preservation tank 331 forms the hot water outlet; the circulating water pipe is inserted into the interior of the heat preservation tank 331 And it is used to supply water to the upper area of the water storage cavity. The nozzle of the circulating water pipe is located outside the insulation tank 331 to form the circulating water inlet; The lower region of the cavity is supplied with water, and the water inlet and outlet pipes 334 are also used to output water in the lower region of the water storage cavity. Specifically, a hot water outlet pipe 332, a circulating water pipe 333 and a water inlet and outlet pipe 334 are inserted into the heat preservation tank 331. The hot water outlet pipe 332 is used to output the hot water in the water tank 33 to supply hot water for users, while the circulating water pipe 333 For circulating water flow, the water inlet and outlet pipes 334 are used to supply water to the water tank 33 on the one hand, and are also used to output and heat the water in the water tank 33 to meet the water storage requirements of the rapid heating water tank 33 . In this way, the water tank 33 can effectively meet the user's demand for using hot water, so as to maximize the use of the hot water in the water tank 33 to heat zero cold water or supply hot water to the outside.

Wherein, the bottom of the heat preservation tank 331 is provided with an installation port; the water tank 33 further includes a sealing cover 335, which is sealedly connected to the installation port, and the hot water outlet pipe 332, the circulating water pipe and the water inlet and outlet pipes 334 are sealed and penetrate through the sealing cover 335. Specifically, the hot water outlet pipe 332 , the circulating water pipe and the water inlet and outlet pipes 334 are installed on the sealing cover 335 , and then the assembly is completed from the bottom of the heat preservation tank 331 through the sealing cover 335 . The hot water outlet pipe 332, the circulating water pipe and the water inlet and outlet pipes 334 are arranged vertically. In order to reduce the fluctuation amplitude of the water temperature output by the hot water pipe 332, the upper end of the circulating water pipe is a closed structure, and the pipe wall of the upper end of the circulating water pipe is provided with a number of water outlet holes 3331, and the water outlet holes 3331 are distributed on the pipe wall of the circulating water pipe , the hot water output from the water outlet hole 3331 can be dispersed into the heat preservation tank 331 and effectively mixed with the water in the heat preservation tank 331 to buffer the water temperature fluctuation in the heat preservation tank 331 . Meanwhile, the upper end of the hot water outlet pipe 332 has an open structure and forms a hot water inlet 3321 , the height of the hot water inlet is not lower than the height of the water outlet, and the hot water inlet can ensure the heat preservation tank 331 The water in the mixture is evenly mixed and then output. In order to increase the hot water output rate, the upper end of the water inlet and outlet pipes 334 is a closed structure, and a number of water passage holes 3341 are opened on the pipe wall of the upper end of the water inlet and outlet pipes 334. When cold water is poured into the heat preservation tank 331, the water passage holes 3341 can Disperse the cold water to the bottom of the heat preservation tank 331 to reduce the impact of the hot water on the upper part of the heat preservation tank 331 and improve the hot water output rate.

In addition, in order to detect the water temperature in the heat preservation tank 331 so that the temperature of the heat preservation tank 331 can be controlled, a first temperature sensor may be provided on the sealing cover 335 as required, and/or a second temperature sensor may be provided on the upper part of the heat preservation tank 331 sensor. Specifically, the first temperature sensor can detect the water inlet temperature at the bottom of the heat preservation tank 331 , and the second temperature sensor can detect the water outlet temperature at the top of the heat preservation tank 331 .

In addition, in order to conveniently control the on-off of the water circuit, electric control valves can be arranged on the heating water outlet pipe 21, the heating return water pipe 22, the cold water inlet pipe 31, and the zero cold water return pipe 32 to control the on-off of the water circuit.

By adding a water tank, the hot water outlet configured on the water tank is used to deliver hot water for domestic use to the outside world, and when zero cold water is heated, the water in the external water pipe enters the circulating water inlet through the zero cold return pipe, so that the water in the external water pipe and the water tank The hot water stored in the tank can be mixed, which can reduce the number of times the gas furnace is switched on and off, so as to save the gas consumption and improve the service life; and when the water in the water tank cannot meet the water supply temperature requirements, and when zero cold water is heated, the external The water in the water pipe is transported by the zero cooling water return pipe and heated by the gas furnace, and then enters the water tank and mixes with the water in the water tank, so as to use the water in the water tank to buffer the water temperature fluctuation during the zero cold water heating process and avoid the water temperature rising too high , which improves the user experience.

The above embodiments are only used to illustrate the technical solutions of the present invention, but not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art can still The recorded technical solutions are modified, or some technical features thereof are equivalently replaced; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions claimed in the present invention.

Claims (10)

1. A gas heating device, characterized in that, comprising: a gas stove, the gas stove is equipped with a general water outlet and a general water inlet, and the gas stove is used for burning gas to heat the water input from the general water inlet and output hot water from the general water outlet; a heating component, the heating component is configured with a heating water outlet pipe and a heating water return pipe; A hot water supply assembly, the hot water supply assembly is configured with a cold water inlet pipe, a zero-cold return water pipe, a water tank and a water pump, and the water tank has a hot water outlet and a circulating water inlet; a water outlet switching valve, which is used to connect the circulating water inlet and the heating water outlet pipe to the total water outlet respectively; a water inlet switching valve, the water outlet switching valve is used to connect the cold water inlet pipe, the zero-cold return water pipe and the heating return water pipe to the main water inlet respectively; a circulating pump, which is connected between the water inlet switching valve and the general water inlet. 2 . The gas heating device according to claim 1 , wherein a one-way valve is also provided on the zero-cold return pipe, and the water flowing through the zero-cold return pipe flows to the Inlet switching valve. 3 . The gas heating device according to claim 1 , wherein the water tank further has a water inlet and outlet, the water inlet and outlet are connected with the cold water inlet pipe, and the water inlet and outlet are also connected by the water inlet switching valve. 4 . Connect with the general water inlet. 4. The gas heating device according to claim 3, wherein the water tank comprises: an insulation tank, wherein a water storage cavity is formed inside the insulation tank; a hot water outlet pipe, the hot water outlet pipe is inserted into the heat preservation tank, and the hot water outlet is formed by a nozzle of the hot water outlet pipe located outside the heat preservation tank; a circulating water pipe, the circulating water pipe is inserted into the inside of the thermal insulation tank, and the nozzle of the circulating water pipe located outside the thermal insulation tank forms the circulating water inlet; The water inlet and outlet pipes are inserted into the inside of the thermal insulation tank, and the nozzles of the water inlet and outlet pipes located outside the thermal insulation tank form the water inlet and outlet ports. 5 . The gas heating device according to claim 4 , wherein an installation port is provided at the bottom of the heat preservation tank; the water tank further comprises a sealing cover, the sealing cover is sealingly connected to the installation port, and the The hot water outlet pipe, the circulating water pipe and the water inlet and outlet pipes are sealed through the sealing cover. 6 . The gas heating device according to claim 5 , wherein the hot water outlet pipe, the circulating water pipe and the water inlet and outlet pipes are arranged vertically. 7 . 7 . The gas heating device according to claim 6 , wherein the upper end of the circulating water pipe is a closed structure, and a plurality of water outlet holes are opened on the pipe wall of the upper end of the circulating water pipe. 8 . 8 . The gas heating device according to claim 7 , wherein the upper end of the hot water outlet pipe is an open structure and forms a hot water inlet, and the height of the hot water inlet is higher than the water outlet hole. 9 . the height of. 9 . The gas heating device according to claim 8 , wherein the upper end of the water inlet and outlet pipes is a closed structure, and the pipe wall of the upper end of the water inlet and outlet pipes is provided with a plurality of water passage holes, and the water passage holes The height is lower than the height of the water outlet. 10. A heating and hot water supply system, comprising a hot water output terminal and a heat dissipation terminal, characterized in that, further comprising the gas heating device according to any one of claims 1-9; the hot water outlet of the gas heating device passes through The water supply pipe is connected to the hot water output terminal, and the water supply pipe is also connected to the zero-cooling water return pipe of the gas heating device through a water return pipe; the heating water outlet pipe and the heating return water pipe of the gas heating device are respectively connected to the heat dissipation The corresponding connection port of the terminal.

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