CN217654100U - Gas water heater - Google Patents

Abstract

The utility model belongs to the technical field of gas heater, a gas heater is specifically provided. The utility model discloses aim at solving the problem that "sandwich" water phenomenon appears when current gas heater opens once more after short duration shuts down. The utility model discloses a gas heater includes combustor, heat exchanger, heat accumulator, fan, water pipe, bypass pipe and mixes the water valve. The fan is used for driving air heated by the burner to flow through the heat exchanger and the heat accumulator in sequence. The water pipe comprises an upstream section, a midstream section and a downstream section, wherein the midstream section is respectively thermally connected with the heat exchanger and the heat accumulator, so that water in the water pipe sequentially flows through the heat accumulator and the heat exchanger. One end of the bypass pipe is in fluid connection with the upstream section, and the other end of the bypass pipe is in fluid connection with the downstream section. The mixing valve is used for controlling whether the cold water in the upstream section flows to the downstream section through the bypass pipe or not. The utility model discloses a gas heater has overcome the problem that "sandwich" water phenomenon appears when opening once more after the short time shut down.

Description

Gas water heater

Technical Field

The utility model belongs to the technical field of gas heater, a gas heater is specifically provided.

Background

The gas water heater is also called a gas water heater, and refers to a gas appliance which takes gas as fuel and transfers heat to cold water flowing through a heat exchanger in a combustion heating mode so as to achieve the purpose of preparing hot water.

Existing gas water heaters all have a burner, a heat exchanger and a water pipe passing through the heat exchanger. When the gas water heater works, the burner heats the heat exchanger, so that the heat exchanger heats cold water in the water pipe. The burner of the existing gas water heater is generally opened by a water flow signal. When the water flow in the water pipe is greater than the start-up flow, the burner ignites and thus heats the heat exchanger. After the gas water heater is shut down, although the burner does not burn any more, the heat exchanger still has residual heat, so that the temperature of stagnant water in the heat exchanger is too high after the stagnant water absorbs heat. The characteristic of the gas water heater causes that when the gas water heater is turned on again after short shutdown, a strand of hot water exceeding the set temperature appears first, then a strand of cold water (cold water which is not heated to the set temperature) appears, and finally the hot water with stable temperature is obtained. This phenomenon is figuratively referred to as "sandwich" water.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to solve the problem that "sandwich" water phenomenon appears when current gas heater is opened once more after short duration shut down.

Another object of the utility model is to make the gas water heater uniform in water outlet temperature.

In order to achieve the purpose, the utility model provides a gas water heater, which comprises a burner, a heat exchanger, a heat accumulator and a fan, wherein the fan is used for driving air heated by the burner to sequentially flow through the heat exchanger and the heat accumulator; the gas water heater further comprises:

the water pipe comprises an upstream section, a midstream section and a downstream section, and the midstream section is respectively thermally connected with the heat exchanger and the heat accumulator so that water in the water pipe sequentially flows through the heat accumulator and the heat exchanger;

a bypass line having one end fluidly connected to the upstream section and another end fluidly connected to the downstream section;

and the water mixing valve is used for controlling whether the cold water in the upstream section flows to the downstream section through the bypass pipe or not.

Optionally, the regenerator, the recuperator and the combustor are arranged in sequence from top to bottom.

Optionally, the regenerator is provided as a honeycomb structure.

Optionally, the heat storage material of the heat accumulator is ceramic or wire.

Optionally, the mixing valve is a three-way control valve connected in series to the downstream section, and the other end of the bypass pipe is connected to the three-way control valve.

Optionally, the mixing valve is a two-way control valve, an inlet of the two-way control valve is connected with the other end of the bypass pipe, and an outlet of the two-way control valve is connected with the downstream section.

Optionally, the gas water heater further comprises a first temperature sensor disposed at the downstream section, the first temperature sensor being configured to detect a temperature of water in the downstream section.

Optionally, the gas water heater further comprises a second temperature sensor disposed at an inlet of the upstream section.

Optionally, the gas water heater further comprises a flow meter in series with the upstream section.

Optionally, the fan is disposed below the burner.

Based on the foregoing description, it can be understood by those skilled in the art that, in the foregoing technical solution of the present invention, a heat accumulator is configured for a gas water heater, and a midstream section of a water pipe is thermally connected to the heat exchanger and the heat accumulator respectively, so that water in the water pipe flows through the heat accumulator and the heat exchanger in sequence; fluidly connecting one end of the bypass pipe to the upstream section and the other end of the bypass pipe to the downstream section; and controlling whether the cold water in the upstream section flows to the downstream section through the bypass pipe or not by the water mixing valve; when making gas heater open again after short duration shut down, can make the cold water of upper reaches section and the hot water mixing of lower reaches section through muddy water valve, prevent that the play water temperature is too high, scald the user. When warm water at the heat accumulator of the gas water heater flows to the water mixing valve, cold water at the upstream section is prevented from flowing to the downstream section through the bypass pipe, and therefore cold water flowing out of the gas water heater is prevented. Furthermore, the heat accumulator is arranged, so that the temperature of the heat exchanger is raised to a preset temperature before the water heated by the heat accumulator is exhausted, and the phenomenon that the gas water heater controls water by three Ming dynasties is effectively avoided.

Optionally, the length of the midstream section corresponding to the heat accumulator is 1 to 4 times the length corresponding to the heat exchanger to ensure that the heat exchanger warms up to be able to heat the water flowing through it to a preset temperature before the water heated by the heat accumulator runs out.

The above and other objects, advantages and features of the present invention will become more apparent to those skilled in the art from the following detailed description of specific embodiments thereof, taken in conjunction with the accompanying drawings.

Drawings

In order to more clearly illustrate the technical solution of the present invention, some embodiments of the present invention will be described below with reference to the accompanying drawings. Those skilled in the art will appreciate that elements or portions of the same reference number identified in different figures are the same or similar; the drawings of the present invention are not necessarily drawn to scale relative to each other. In the drawings:

FIG. 1 is a schematic diagram of a gas water heater according to some embodiments of the present invention;

fig. 2 is a schematic diagram of the distribution of temperature sensors in some embodiments of the invention;

fig. 3 is a schematic diagram of the distribution of temperature sensors in further embodiments of the present invention;

fig. 4 is a schematic diagram of the distribution of temperature sensors in further embodiments of the present invention;

fig. 5 is a schematic diagram of a distribution of temperature sensors according to other embodiments of the present invention.

Detailed Description

It is to be understood by those skilled in the art that the embodiments described below are only a part of the embodiments of the present invention, and not all embodiments of the present invention, and the part of the embodiments are intended to explain the technical principle of the present invention and not to limit the scope of the present invention. Based on the embodiments provided by the present invention, all other embodiments obtained by those skilled in the art without any inventive work should still fall within the scope of the present invention.

It should be noted that in the description of the present invention, the terms "center", "upper", "lower", "top", "bottom", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicating the directions or positional relationships are based on the directions or positional relationships shown in the drawings, which are only for convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Further, it should be noted that, in the description of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; either directly or indirectly through intervening media, or through the communication between two elements. The specific meaning of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

Furthermore, it should be noted that in the description of the present invention, the terms "cold" and "heat" are two descriptions of the same physical state. That is, the higher the "cold" a certain object (e.g., evaporator, air, condenser, etc.) has, the lower the "heat" it has, and the lower the "cold" it has, the higher the "heat" it has. A certain target object can release heat while absorbing cold, and can absorb heat while releasing cold. Some object stores "cold" or "heat" in order to keep the object at its current temperature. "refrigeration" and "heat absorption" are two descriptions of the same physical phenomenon, i.e., a target (e.g., an evaporator) absorbs heat while it is refrigerating.

A gas water heater according to some embodiments of the present invention will be described in detail with reference to fig. 1 and 2. Wherein, fig. 1 is the composition schematic diagram of the gas water heater in some embodiments of the present invention, and fig. 2 is the distribution schematic diagram of the temperature sensor in some embodiments of the present invention.

As shown in fig. 1, in some embodiments of the present invention, the gas water heater includes a body 1, a burner 2, a gas valve 3, a heat exchanger 4, a heat accumulator 5, a water pipe 6, a fan 7, a smoke collecting hood 8, a smoke exhaust pipe 9, a bypass pipe 10, a three-way control valve 12, and a flow meter 13.

As shown in fig. 1, the body 1 defines a combustion chamber 101. The burner 2 is arranged in the combustion chamber 101, the gas valve 3 is fluidly connected with the burner 2, and the gas valve 3 is used for controlling whether external gas flows to the burner 2.

With continued reference to fig. 1, the heat exchanger 4 and the regenerator 5 are arranged above the burner 2 in this order from bottom to top, so that the air after being heated by the burner 2 flows through the heat exchanger 4 and the regenerator 5 in this order.

Further, although not shown in the drawings, in some embodiments of the present invention, the heat accumulator 5 is provided in a honeycomb structure, so that the inside of the heat accumulator 5 is formed with a hole passage for allowing air to flow therethrough, thereby reducing the wind resistance of the heat accumulator 5 and providing the heat accumulator 5 with good heat storage capacity and strength. Preferably, the heat storage material of the heat accumulator 5 is ceramic or wire.

Furthermore, in other embodiments of the present invention, it is also possible for those skilled in the art to set the heat accumulator 5 to any other feasible shape and to set the heat storage material of the heat accumulator 5 to any other feasible material, as required. For example, the heat storage material of the heat accumulator 5 is provided as a metal plate, and the heat accumulator 5 is provided in a structure having a plurality of metal plates distributed at equal intervals.

With continued reference to fig. 1, the water tube 6 includes an upstream section 61, a midstream section 62, and a downstream section 63. The midstream section 62 is thermally connected to the heat exchanger 4 and the heat accumulator 5, respectively, so that the water in the water pipe 6 flows through the heat accumulator 5 and the heat exchanger 4 in sequence.

In some embodiments of the present invention, the midstream section 62 may be thermally coupled to the heat exchanger 4 and the heat accumulator 5 in any feasible manner. Such as snap fit, plug, weld, etc.

Preferably, the length of the midstream section 62 corresponding to the heat accumulator 5 is 1 to 4 times the length corresponding to the heat exchanger 4, in order to ensure that the heat exchanger 4 is warmed up to be able to heat the water flowing through it to a preset temperature (either a temperature set by the manufacturer or a temperature adjusted by the user) before the water heated by the heat accumulator 5 runs out. It is further preferred that the length of the midstream section 62 corresponding to the regenerator 5 is 2 to 3 times the length corresponding to the heat exchanger 4.

With continued reference to fig. 1, a fan 7 is provided below the burner 2, the fan 7 being arranged to drive air heated by the burner 2 through the heat exchanger 4 and the regenerator 5 in sequence.

With continued reference to fig. 1, a fume collecting hood 8 is provided above the heat accumulator 5 for collecting the fumes inside the gas water heater. One end of the smoke exhaust pipe 9 is connected with the smoke collecting hood 8, and the other end of the smoke exhaust pipe 9 is used for leading to the outside so as to exhaust smoke generated by the gas water heater to the outside.

With continued reference to FIG. 1, the two ends of the bypass line 10 are fluidly connected to the upstream section 61 and the downstream section 63, respectively. Specifically, one end of the bypass pipe 10 is connected to the upstream section 61, and the other end of the bypass pipe 10 is fluidly connected to the downstream section 63 through the three-way control valve 12 as a mixing valve.

Further specifically, the three-way control valve 12 includes a first inlet (not shown in the figure), a second inlet (not shown in the figure), and an outlet (not shown in the figure), through which the three-way control valve 12 is connected in series into the downstream section 63. In other words, the downstream section 63 is divided into two parts, one part being connected to the first inlet of the three-way control valve 12 and the other part being connected to the outlet of the three-way control valve 12. Further, the three-way control valve 12 is connected to the other end of the bypass pipe 10 through a second inlet thereof.

With continued reference to fig. 1, flow meter 13 is connected in series with upstream section 61. In other words, the upstream section 61 is divided into two parts, which are connected in series at the inlet and outlet of the flow meter 13, respectively.

Further, the flow meter 13 may be installed at the inlet of the upstream section 61 as needed by those skilled in the art.

As shown in fig. 2, in some embodiments of the present invention, the gas water heater further comprises a first temperature sensor 14, the first temperature sensor 14 being used for detecting the temperature of the water in the downstream section 63. Preferably, the first temperature sensor 14 is disposed downstream of the three-way control valve 12.

The working principle of the gas water heater in some embodiments of the present invention will be described in detail with reference to fig. 1 and 2.

If the gas water heater has not been turned on for a long period of time (e.g., more than 2 hours) before, the flow meter 13 detects that water flows in the water pipe 6 when a user turns on a faucet connected to the gas water heater. When the flow meter 13 detects that the water flow reaches a set threshold value (which is set by the manufacturer), the gas valve 3 is opened, the burner 2 is ignited, and the fan 7 starts to operate. The fan 7 drives the air heated by the burner 2 through the heat exchanger 4 and the regenerator 5 in sequence and thus heats the water in the midstream section 62. In this process, the first temperature sensor 14 detects the water temperature in the downstream section 63 in real time. When the first temperature sensor 14 detects that the temperature of the water in the downstream section 63 is lower than a first preset temperature (temperature set by the manufacturer or temperature regulated by the user), the three-way control valve 12 puts only the first inlet in communication with the outlet, i.e. it prohibits cold water from flowing from the upstream section 61 to the downstream section 63 via the bypass pipe 10, in order to avoid the temperature of the water flowing out of the faucet being too low. When the first temperature sensor 14 detects that the temperature of the water in the downstream section 63 is higher than a second preset temperature (greater than or equal to the first preset temperature and set by the manufacturer or adjusted by the user), the three-way control valve 12 makes the first inlet and the second inlet communicate with the outlet, respectively, i.e., makes the cold water flow from the upstream section 61 to the downstream section 63 via the bypass pipe 10, so that the cold water mixes the high-temperature water flowing out from the midstream section 62, preventing the temperature of the water flowing out from the faucet from being too high, scalding the user.

If the user has just turned the faucet on and off for a short period of time (e.g., 5 min) before, the temperature of the heat exchanger 4 is still high at this time, resulting in the water retained at the heat exchanger 4 in the midstream section 62 absorbing more heat and being at a higher temperature. Meanwhile, since the heat accumulator 5 is located above the heat exchanger 4 (downstream of the heat exchanger 4 on the path of the flow of the hot air), the heat accumulator 5 is heated to a lower temperature than the heat exchanger 4, so that the water retained at the heat accumulator 5 in the midstream section 62 absorbs less heat and is at a lower temperature (relative to the temperature of the water retained at the heat exchanger 4 in the midstream section 62).

When the user turns on the water tap connected to the gas water heater again, the first temperature sensor 14 detects that the temperature of water in the downstream section 63 is higher than a second preset temperature, and the three-way control valve 12 makes the first inlet and the second inlet communicate with the outlet, respectively, so that cold water flows from the upstream section 61 to the downstream section 63 via the bypass pipe 10, and high-temperature water flowing from the intermediate section 62 is mixed. Meanwhile, when the flow meter 13 detects that the water flow reaches a set threshold value (which is set by the manufacturer), the gas valve 3 is opened, the burner 2 is ignited, and the fan 7 starts to operate. The fan 7 drives the air heated by the burner 2 through the heat exchanger 4 and the regenerator 5 in sequence and thus heats the water in the midstream section 62.

Further, after flowing out with the high-temperature water heated by the heat exchanger 4 in the midstream section 62, the water that would otherwise have stagnated at the heat accumulator 5 continues to flow toward the outlet of the downstream section 63. The water in the downstream section 63 starts to cool and therefore the first temperature sensor 14 detects that the temperature of the water in the downstream section 63 is lower than the first preset temperature, and controls the three-way control valve 12 to communicate only the first inlet with the outlet.

In the process, the heat exchanger 4 is continuously heated by the burner 2, so that the heat exchanger 4 is heated to a first preset temperature before the water heated by the heat accumulator 5 flows out, and the phenomenon of water control by the Mingming system in the gas water heater is effectively avoided.

A gas water heater according to further embodiments of the present invention will now be described in detail with reference to fig. 3.

It should be noted that, for convenience of description and to enable those skilled in the art to quickly understand the technical solution of the present invention, only the differences between the other embodiments and the previous embodiments are described in detail hereinafter. For further embodiments that are the same as some of the previous embodiments, one skilled in the art can refer to the description of some of the previous embodiments.

As shown in fig. 3, in contrast to some of the embodiments described hereinbefore, in still other embodiments of the present invention, the first temperature sensor 14 is arranged upstream of the three-way control valve 12, and the gas water heater further comprises a second temperature sensor 15 arranged at the inlet of the upstream section 61. The second temperature sensor 15 is used to detect the temperature of the cold water flowing into the water pipe 6.

When the first temperature sensor 14 detects that the temperature of the water in the downstream section 63 is higher than a second preset temperature, the temperature of the cold water in the water pipe 6 is detected by the second temperature sensor 15, so that the distribution ratio of the hot water and the cold water is determined according to the temperature of the cold water in the upstream section 61 and the temperature of the hot water in the downstream section 63, so that the temperature of the water flowing out of the faucet is just right. Further, after the distribution ratio of the hot water and the cold water is determined, the opening ratio of the three-way control valve 12 is determined according to the distribution ratio. That is, the respective degrees of opening of the first inlet and the second inlet are determined. Since the determination of the distribution ratio of the hot water and the cold water based on the temperature of the cold water in the upstream section 61 and the temperature of the hot water in the downstream section 63, and the determination of the degree of opening of the first inlet and the second inlet of the three-way control valve 12 based on the distribution ratio can be achieved by at least conventional technical means in the art, a detailed description thereof will be omitted.

As shown in fig. 4, in contrast to some of the embodiments described above, in still other embodiments of the present invention, the first temperature sensor 14 is disposed upstream of the three-way control valve 12, and the gas water heater further includes a third temperature sensor 16 disposed between the three-way control valve 12 and the outlet of the downstream section 63.

In still other embodiments of the present invention, it is determined by the temperature value detected by the first temperature sensor 14 whether to allow cold water to flow from the upstream section 61 to the downstream section 63 via the bypass pipe 10, mixing the high-temperature water flowing out from the midstream section 62. The size of the opening of the second opening of the three-way control valve 12 is determined by the temperature value detected by the third temperature sensor 16. Specifically, in the case where the three-way control valve 12 communicates the second opening with the outlet, the degree of opening of the second opening increases as the temperature detected by the third temperature sensor 16 increases.

In contrast to some of the embodiments described above, in other embodiments of the present invention, as shown in fig. 5, the mixing valve employs a two-way control valve 17. Specifically, an inlet of the two-way control valve 17 is connected to the other end of the bypass pipe 10, and an outlet of the two-way control valve 17 is connected to the downstream section 63.

Furthermore, a person skilled in the art may also, if desired, provide a second temperature sensor 15 at the inlet of the upstream section 61, in order to detect the temperature of the cold water flowing into the water pipe 6 by means of this second temperature sensor 15.

So far, the technical solutions of the present invention have been described in connection with the foregoing embodiments, but it is easily understood by those skilled in the art that the scope of the present invention is not limited to these specific embodiments. Without deviating from the technical principle of the present invention, those skilled in the art can split and combine the technical solutions in the above embodiments, and also can make equivalent changes or substitutions for related technical features, and any changes, equivalent substitutions, improvements, etc. made within the technical concept and/or technical principle of the present invention will fall within the protection scope of the present invention.

Claims (10)

1. The gas water heater is characterized by comprising a burner, a heat exchanger, a heat accumulator and a fan, wherein the fan is used for driving air heated by the burner to sequentially flow through the heat exchanger and the heat accumulator;

the gas water heater further comprises:

the water pipe comprises an upstream section, a midstream section and a downstream section, and the midstream section is respectively thermally connected with the heat exchanger and the heat accumulator so that water in the water pipe sequentially flows through the heat accumulator and the heat exchanger;

a bypass line having one end fluidly connected to the upstream section and another end fluidly connected to the downstream section;

and the water mixing valve is used for controlling whether the cold water in the upstream section flows to the downstream section through the bypass pipe or not.

2. The gas water heater of claim 1,

the heat accumulator, the heat exchanger and the combustor are sequentially arranged from top to bottom.

3. The gas water heater of claim 2,

the heat accumulator is arranged to be of a honeycomb structure.

4. The gas water heater of claim 3,

the heat storage material of the heat accumulator is ceramic or metal wire.

5. The gas water heater of claim 1,

the water mixing valve is a three-way control valve which is connected in series with the downstream section, and the other end of the bypass pipe is connected with the three-way control valve.

6. The gas water heater of claim 1,

the water mixing valve is a two-way control valve, an inlet of the two-way control valve is connected with the other end of the bypass pipe, and an outlet of the two-way control valve is connected with the downstream section.

7. Gas water heater according to claim 5 or 6,

the gas water heater further comprises a first temperature sensor disposed at the downstream section,

the first temperature sensor is for detecting a temperature of water in the downstream section.

8. The gas water heater of claim 7,

the gas water heater further includes a second temperature sensor disposed at an inlet of the upstream segment.

9. Gas water heater according to any one of claims 1 to 6,

the gas water heater also includes a flow meter in series with the upstream section.

10. Gas water heater according to any one of claims 1 to 6,

the fan is arranged below the burner.

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