CN221839781U - Gas heating installation - Google Patents

Abstract

The application relates to a gas heating device, comprising: the device comprises a main heat exchanger, a fan housing, a hot air heat exchanger, a circulating pump, a heating valve, a water inlet pipe and a water outlet pipe. The main heat exchanger is accommodated in the fan housing and is provided with a first through flow end and a second through flow end. The hot air heat exchanger is accommodated in the fan housing and is provided with a third flow end and a fourth flow end. One end of the circulating pump is communicated with the first through-flow end, and the other end of the circulating pump is communicated with the third through-flow end. The heating valve and the circulating pump are connected in series between the first through flow end and the second through flow end. When there is a demand for heating air in the room, the heating valve is opened, and the circulation pump and the fan are simultaneously opened. The circulating water flows through the main heat exchanger, then the temperature rises, and the circulating water flows through the hot air heat exchanger under the action of the circulating pump. Under the action of the fan, the hot air is blown out of the fan housing to heat the indoor space. Compared with the existing wall-mounted furnace, the gas heating device does not need to arrange a radiator or a floor heating pipeline indoors, so that the cost is saved, and the follow-up overhaul is convenient.

Description

Gas heating installation

Technical Field

The present application relates to the technical field of gas heating, and in particular to a gas heating device.

Background Art

Currently, the common household heating methods in China in winter include small boilers, coal stoves, gas wall-mounted boilers, air conditioners, electric heaters, air energy and other methods.

When a gas wall-mounted boiler is used for heating, the water flow absorbs the heat released by the gas combustion during the first heat exchange, and then dissipates the heat into the room through the radiator or floor heating pipes to provide heating.

Then, the overall cost of arranging and installing radiators or floor heating pipes indoors is high, and subsequent maintenance is inconvenient, so there is room for improvement.

Utility Model Content

The technical problem solved by the present application is to provide a gas heating device which can avoid the need to install radiators or floor heating pipelines indoors and directly output warm air from the outside of the gas heating device.

The above technical problems are solved by the following technical solutions:

A gas heating device, comprising:

A main heat exchanger is provided with a first flow end and a second flow end which are connected to each other;

The wind hood is provided with an air inlet and an air outlet connected to each other; a heating fan is arranged in the wind hood;

A hot air heat exchanger is contained in the wind cover; it is provided with a third flow end and a fourth flow end which are connected; the fourth flow end is connected with the second flow end;

A circulation pump, one end of which is connected to the first flow end, and the other end of which is connected to the third flow end;

A heating valve is connected in series with the circulation pump between the first flow end and the second flow end;

a water inlet pipe, the water inlet pipe being connected to the first flow end, and the water inlet pipe being provided with a first stop valve; and

A water outlet pipe is connected to the second flow end, and a second stop valve is arranged on the water outlet pipe.

The gas heating device described in the present application has the following beneficial effects compared with the background technology: when there is a demand for hot water, the circulating pump is closed, the first stop valve and the second stop valve are opened, the heating valve is closed, the circulating pump and the fan are closed, and cold water enters from the water inlet pipe and flows through the main heat exchanger. The water flow increases in temperature after absorbing heat in the main heat exchanger, and then flows out from the water outlet pipe to provide hot water. When there is a demand for heating air indoors, the heating valve is opened, and the circulating pump and the fan are turned on at the same time. The circulating pump, the main heat exchanger and the hot air heat exchanger form a circulating heating pipeline. After the circulating heating pipeline is filled with water, the first stop valve and the second stop valve are closed. The circulating water flows through the main heat exchanger and the temperature increases, and then flows through the hot air heat exchanger under the action of the circulating pump. The circulating water exchanges heat with the cold air through the hot air heat exchanger, so that the cold air forms hot air. Under the action of the fan, the hot air is blown outside the wind hood to heat the room. Compared with existing wall-mounted boilers, gas heating devices do not require the installation of radiators or floor heating pipes indoors, which not only saves costs but also facilitates subsequent maintenance.

In one of the embodiments, it also includes a hydraulic detection component arranged on the water inlet pipe. When the liquid replenishing valve is in a connected state and the liquid drain valve is in an isolated state, the hydraulic detection component is used to detect the fluid pressure condition in the circulating water circuit. When the detection result of the hydraulic detection component is greater than a predetermined value, it can be confirmed that the circulating water circuit is full of fluid.

In one embodiment, the main heat exchanger, the hot air heat exchanger and the circulating pump form a circulating heating pipeline, and an exhaust valve is provided on the circulating heating pipeline. In the process of replenishing fluid into the circulating water circuit, the original gas in the circulating water circuit is discharged from the overflow end of the exhaust valve, so as to avoid the fluid being difficult to replenish into the circulating water circuit due to the gas pressure in the circulating water circuit.

In one embodiment, a flow detection member is also provided on the circulating heating pipeline; a triggering cooperation is formed between the flow detection member and the heating fan to operate the heating fan when the flow detection value detected by the flow detection member is greater than a flow threshold. Since the heating fan automatically responds to the operation when the fluid flows in the circulating water circuit, it is helpful to simplify the control operation of the gas heating device.

In one of the embodiments, the gas heating device further includes a temperature sensor disposed on the wind hood, and the temperature sensor is used to detect the air outlet temperature of the heating fan, thereby facilitating automatic operation adjustment of the gas heating device.

In one embodiment, the gas heating device further includes a shell. The shell includes a first shell, a partition and a second shell; the partition is arranged between the first shell and the second shell; the partition and the first shell form a first chamber; the main heat exchanger is accommodated in the first chamber; the partition and the second shell form a second chamber; the wind hood is accommodated in the first chamber. Since the partition is located between the first chamber and the second chamber, the heat of the high-temperature flue gas in the first chamber can be transferred to the second chamber through the partition. When the airflow passes near the partition, the partition can also play a certain heating role on the airflow, thereby increasing the heat transferred to the airflow per unit time, which is beneficial to improving the heating efficiency of the gas heating device.

In one embodiment, the second shell is provided with a plurality of air vents along the periphery of the hot air heat exchanger. This allows the high-temperature flue gas that has passed through the main heat exchanger to be closer to the partition, so that the partition can absorb more heat. Or before the airflow penetrates the hot air heat exchanger, the distance between the airflow and the partition can be made smaller, so that the heat of the partition can be transferred to the airflow more efficiently. In addition, the temperature balance in the second chamber is improved to avoid local overheating of the hot air heat exchanger or the second shell.

In one embodiment, it further includes a combustion chamber and a smoke exhaust pipe; the main heat exchanger is accommodated in the combustion chamber; and the smoke exhaust pipe is connected to the internal space of the combustion chamber. Under the isolation effect of the combustion chamber, the high-temperature flue gas is prevented from directly contacting the outer shell, and the user is prevented from being scalded by the outer shell. There is a large relative area between the combustion chamber and the partition, which is conducive to increasing the heat transferred from the combustion chamber to the partition. A larger part of the high-temperature flue gas can be in contact with the top wall of the combustion chamber, which is conducive to increasing the temperature of the top wall of the combustion chamber and increasing the heat transferred from the burner chamber to the partition.

In one embodiment, it also includes a flow detection component, a burner and an ignition needle; the ignition needle is connected to the burner; a discharge gap is formed between the end of the ignition needle and the burner; the flow detection component is connected between the first flow end and the third flow end, or the flow detection component is connected between the second flow end and the fourth flow end; a triggering coordination is formed between the flow detection component and the ignition needle so that a discharge arc is formed between the ignition needle and the burner when the flow detection value detected by the flow detection component is greater than the flow threshold. Since the ignition needle automatically responds and applies voltage to the burner when the fluid flows in the circulating water circuit, it is helpful to simplify the control operation of the gas heating device.

In one embodiment, the gas heating device further comprises an expansion water tank arranged on the water outlet pipe or the water inlet pipe. By arranging the expansion water tank, the pressure fluctuation in the circulating water circuit can be reduced, thereby avoiding fluid leakage caused by the internal pressure fluctuation in the circulating water circuit.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic structural diagram of a gas heating device according to an embodiment of the present application.

Fig. 2 is a schematic diagram of the structure of the gas heating device shown in Fig. 1 after adding the airflow direction, and the flow direction of the airflow or high-temperature flue gas is shown by the arrow.

FIG. 3 is a partial schematic diagram of the gas heating device shown in FIG. 2 .

Reference numerals: 100, gas heating device; 20, housing; 21, first housing; 22, partition; 23, second housing; 24, first chamber; 25, second chamber; 26, air vent; 27, heating air vent; 28, room temperature sensor; 30, main heat exchanger; 31, first flow end; 32, second flow end; 40, hot air heat exchanger; 41, third flow end; 42, fourth flow end; 50, circulation pump; 501, heating valve; 51, suction port; 52, discharge port; 53 , flow detection part; 54, controller; 60, first stop valve; 601, water inlet pipe; 61, hydraulic detection part; 62, exhaust valve; 70, second stop valve; 701, water outlet pipe; 71, expansion tank; 80, wind hood; 81, air inlet; 82, air outlet; 83, heating fan; 84, temperature sensor; 90, combustion chamber; 91, exhaust pipe; 92, burner; 93, ignition needle; 94, gas proportional valve; 95, air inlet connector; 96, outer pipe; 97, blower.

DETAILED DESCRIPTION

In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

In the description of the present application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

In this application, unless otherwise clearly specified and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

In the present application, unless otherwise clearly specified and limited, if there is a description that a first feature is "above" or "below" a second feature, etc., or similar descriptions appear, it can mean that the first and second features are directly in contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only implementation method.

The technical solution provided by the embodiments of the present application is described below in conjunction with the accompanying drawings.

With reference to FIGS. 1 to 3 , the present application provides a gas heating device 100 .

In some embodiments, the gas heating device 100 uses the heat released by the combustion of gas for heating. In some embodiments, the gas heating device 100 is used to heat the surrounding environment outside the fuselage. In other embodiments, the gas heating device 100 can also heat a designated environment space outside the fuselage under the guidance of a gas pipeline.

In some embodiments, as shown in FIG. 1 and FIG. 2 , the gas heating device 100 includes a burner 92, and the externally input gas is burned after passing through the burner 92 to generate high-temperature flue gas. In some embodiments, the gas heating device 100 includes a gas proportional valve 94 connected to the burner 92. In the flow path of the gas, the gas proportional valve 94 is located upstream of the burner 92, and the gas proportional valve 94 is used to adjust the gas flow rate entering the burner 92. In some embodiments, the gas heating device 100 includes an air intake connector 95 connected to the gas proportional valve 94. In the flow path of the gas, the air intake connector 95 is located upstream of the gas proportional valve 94, and the air intake connector 95 is used to connect the gas supply pipeline.

In some embodiments, as shown in FIG. 1 and FIG. 3 , the gas heating device 100 includes: a housing 20, a main heat exchanger 30, a hot air heat exchanger 40, a circulation pump 50, a first stop valve 60, and a second stop valve 70. The main heat exchanger 30 is accommodated in the housing 20, and the main heat exchanger 30 is provided with a first flow end 31 and a second flow end 32. The first flow end 31 is connected to the second flow end 32.

In some embodiments, in combination with FIG. 1 and FIG. 2 , the gas heating device 100 further includes a hood 80 and a heating fan 83 disposed in the hood 80. The hood 80 is provided with an air inlet 81 and an air outlet 82. The air inlet 81 is arranged in communication with the air outlet 82. The hot air heat exchanger 40 covers the air inlet 81 of the hood 80. The heating fan 83 is arranged at the air outlet 82. Specifically, when the heating fan 83 is in operation, the air flow flows in the direction away from the air inlet 81 at the air outlet 82, and the air inlet 81 forms a low pressure state. After entering the housing 20, the external air flow is sucked into the air inlet 81 of the hood 80. Since the hot air heat exchanger 40 covers the air inlet 81 of the hood 80, the external air flow can pass through the hot air heat exchanger 40 after entering the housing 20, so that the air flow can absorb heat and the temperature rises. Specifically, the hood 80 is accommodated in the housing 20.

In some embodiments, the hot air heat exchanger 40 is accommodated in the wind cover 80, and the hot air heat exchanger 40 is provided with a third flow end 41 and a fourth flow end 42. The third flow end 41 is connected to the fourth flow end 42. The fourth flow end 42 is connected to the second flow end 32. One end of the circulation pump 50 is connected to the first flow end 31, and the other end of the circulation pump 50 is connected to the third flow end 41.

In some embodiments, one end of the circulation pump 50 is connected to the first flow end 31, and the other end of the circulation pump 50 is connected to the third flow end 41. Specifically, the circulation pump 50 is accommodated in the housing 20, the suction port 51 of the circulation pump 50 is connected to one of the first flow end 31 and the third flow end 41, and the discharge port 52 of the circulation pump 50 is connected to the other of the first flow end 31 and the third flow end 41.

In some embodiments, the gas heating device 100 further includes a heating valve 501, a water inlet pipe 601 and a water outlet pipe 701. The heating valve 501 and the circulating pump 50 are connected in series between the first flow end 31 and the second flow end 32. The water inlet pipe 601 is in communication with the first flow end 31, the water outlet pipe 701 is in communication with the second flow end 32, and a first stop valve 60 is provided on the water inlet pipe 601. A second stop valve 70 is provided on the water outlet pipe 701. The two ports of the first stop valve 60 have a connection state and a cut-off state, and one of the ports of the first stop valve 60 is in communication with at least one of the first flow end 31, the second flow end 32, the third flow end 41 and the fourth flow end 42. The two ports of the second stop valve 70 have a connection state and a cut-off state, and one of the ports of the second stop valve 70 is in communication with at least one of the first flow end 31, the second flow end 32, the third flow end 41 and the fourth flow end 42.

Specifically, when there is a demand for hot water, the circulation pump 50 is closed, the first stop valve 60 and the second stop valve 70 are opened, the heating valve 501 is closed, the circulation pump 50 and the fan are closed, and cold water enters from the water inlet pipe 601 and flows through the main heat exchanger 30. The water flow increases in temperature after absorbing heat in the main heat exchanger 30, and then flows out from the water outlet pipe 701 to provide hot water. When there is a demand for heating air indoors, the heating valve 501 is opened, and the circulation pump 50 and the fan are turned on at the same time. The circulation pump 50, the main heat exchanger 30 and the hot air heat exchanger 40 form a circulation heating pipeline. After the circulation heating pipeline is filled with water, the first stop valve 60 and the second stop valve 70 are closed. The temperature of the circulating water increases after flowing through the main heat exchanger 30, and then flows through the hot air heat exchanger 40 under the action of the circulation pump 50. The circulating water exchanges heat with the cold air through the hot air heat exchanger 40, so that the cold air forms hot air. Under the action of the fan, the hot air is blown to the outside of the wind cover 80 to heat the room. Compared with the existing wall-mounted boiler, the gas heating device 100 does not need to lay radiators or floor heating pipelines indoors, which not only saves costs but also facilitates subsequent maintenance.

Specifically, since the first flow end 31 is connected to the third flow end 41, and the second flow end 32 is connected to the fourth flow end 42, a circulating water circuit is formed between the main heat exchanger 30 and the hot air heat exchanger 40. When the other port of the first stop valve 60 is connected to the fluid supply source, when the first stop valve 60 is in a connected state and the second stop valve 70 is in a disconnected state, the fluid provided by the fluid supply source supplements the fluid in the circulating water circuit under the action of water pressure, thereby avoiding excessive temperature due to insufficient fluid in the circulating water circuit. Specifically, when the second stop valve 70 is in a connected state and the first stop valve 60 is in a disconnected state, the fluid in the circulating water circuit can be discharged from the second stop valve 70, so as to perform inspection or maintenance on the gas heating device 100.

Specifically, the fluid is water or other non-flammable liquids that can absorb and release heat.

In some embodiments, as shown in FIG. 1 and FIG. 2 , the housing 20 includes a first shell 21, a partition 22, and a second shell 23. The partition 22 is disposed between the first shell 21 and the second shell 23, and the partition 22 and the first shell 21 enclose a first chamber 24. The main heat exchanger 30 is accommodated in the first chamber 24. The partition 22 and the second shell 23 enclose a second chamber 25. The wind hood 80 is accommodated in the first chamber 24. Specifically, since the main heat exchanger 30 and the hot air heat exchanger 40 are in different spaces, and the first chamber 24 and the second chamber 25 are separated by the partition 22, it is possible to prevent the high-temperature flue gas from mixing with the airflow passing through the hot air heat exchanger 40, and to prevent the high-temperature flue gas from being discharged with the airflow. At the same time, since the partition 22 is located between the first chamber 24 and the second chamber 25, the heat of the high-temperature flue gas in the first chamber 24 can be transferred to the second chamber 25 through the partition 22. When the airflow passes near the partition 22, the partition 22 can also heat the airflow to a certain extent, thereby increasing the heat transferred to the airflow per unit time, which is beneficial to improving the heating efficiency of the gas heating device 100.

In some embodiments, as shown in FIG1 , the first chamber 24 , the partition plate 22 and the second chamber 25 are arranged in sequence from bottom to top. The hot air heat exchanger 40 is fixedly connected to the inner wall of the second housing 23 .

In some embodiments, as shown in FIG1 , the main heat exchanger 30 is arranged parallel to the partition 22. Specifically, the angle between the plane where the main heat exchanger 30 is located and the partition 22 can be small and close to being arranged parallel, which is conducive to reducing the gap between the main heat exchanger 30 and the partition 22, allowing the high-temperature flue gas passing through the main heat exchanger 30 to be closer to the partition 22, so that the partition 22 can absorb more heat.

In some embodiments, as shown in FIG1 , the hot air heat exchangers 40 are respectively arranged parallel to the partitions 22. Specifically, the angle between the plane where the hot air heat exchanger 40 is located and the partition 22 can be small and close to being arranged parallel, so as to help reduce the gap between the hot air heat exchanger 40 and the partition 22, and before the airflow penetrates the hot air heat exchanger 40, the distance between the airflow and the partition 22 can be made smaller, so that the heat of the partition 22 can be more efficiently transferred to the airflow.

In some embodiments, as shown in FIG1 , the second housing 23 is provided with a plurality of vents 26 along the periphery of the hot air heat exchanger 40. Specifically, since the vents 26 are provided at multiple angles around the hot air heat exchanger 40, external air flows into the second housing 23 from different angles, thereby improving the temperature balance in the second chamber 25 and preventing the hot air heat exchanger 40 or the second housing 23 from being locally overheated.

In some embodiments, as shown in FIG1 , the air inlet connector 95 is installed on the outside of the housing 20 . More specifically, the air inlet connector 95 is installed on the lower end of the first housing 21 .

In some embodiments, the first flow end 31 and the second flow end 32 are connected through the internal pipe body of the main heat exchanger 30. The main heat exchanger 30 also includes a plurality of metal fins connected to the internal pipe body. In some embodiments, the third flow end 41 and the fourth flow end 42 are connected through the internal pipe body of the hot air heat exchanger 40. The hot air heat exchanger 40 also includes a plurality of metal fins connected to the internal pipe body.

In some embodiments, in combination with FIG. 2 and FIG. 3, the gas heating device 100 further includes a hydraulic detection member 61 disposed on the water inlet pipe 601. The hydraulic detection member 61 can identify the pressure of the internal fluid, and the port of the hydraulic detection member 61 is connected to the first flow end 31. Specifically, when the other port of the first stop valve 60 is connected to the fluid supply source, when the first stop valve 60 is in a connected state and the second stop valve 70 is in a disconnected state, the hydraulic detection member 61 is used to detect the fluid pressure condition in the circulating water circuit, and when the detection result of the hydraulic detection member 61 is greater than a predetermined value, it can be confirmed that the circulating water circuit is full of fluid. In some embodiments, the hydraulic detection member 61 includes a water pressure gauge or other detection device that can detect the fluid pressure condition in the circulating water circuit. Further, when the detection result of the hydraulic detection member 61 is greater than a predetermined value, the fluid replenishment operation can be ended by switching the first stop valve 60 to the disconnected state.

In some embodiments, in combination with FIG. 2 and FIG. 3 , the main heat exchanger 30, the hot air heat exchanger 40 and the circulating pump 50 form a circulating heating pipeline. An exhaust valve 62 is provided on the circulating heating pipeline. The input end of the exhaust valve 62 is connected to at least one of the first flow end 31, the second flow end 32, the third flow end 41 and the fourth flow end 42. Specifically, the exhaust valve 62 has an overflow end. In the process of replenishing the fluid in the circulating water circuit, the original gas in the circulating water circuit is discharged from the overflow end of the exhaust valve 62 to avoid the fluid from being difficult to replenish into the circulating water circuit due to the air pressure in the circulating water circuit. Specifically, after the replenishment operation of the fluid is completed, the exhaust valve 62 is turned off to avoid the fluid from overflowing from the exhaust valve 62. In one embodiment, the exhaust valve 62 is connected to the circulating water circuit through a single input end. In another embodiment, the exhaust valve 62 also has an output end, and the exhaust valve 62 is connected in series between the first flow end 31 and the third flow end 41 through the input end and the output end.

In some other embodiments, when the exhaust valve 62 is not provided, the fluid can be completely filled into the circulating water circuit by opening the second stop valve 70 at a smaller degree and opening the first stop valve 60 at a larger degree.

Specifically, after the airflow leaves the air outlet 82, it can be discharged outside the housing 20 to directly heat the external environment of the gas heating device 100. The air outlet 82 can also be connected to a gas pipeline, which guides the airflow leaving the air outlet 82 to a designated environmental space.

In some embodiments, the inner diameter of the air outlet 82 is smaller than the inner diameter of the air inlet 81, so that the size of the fan can be reduced. In the direction from the air inlet 81 to the air outlet 82, the inner space of the air cover 80 is narrowed, so that the inner wall of the air cover 80 plays a transitional guiding role for the airflow in the air cover 80, reducing the noise generated when the airflow flows from the air inlet 81 to the air outlet 82.

In some embodiments, as shown in FIG1 , the heating fan 83 is disposed on the inner circumference of the air outlet 82. In another embodiment, the heating fan 83 is located on the side of the air outlet 82 facing away from the air inlet 81.

In some embodiments, as shown in FIG. 2 , the second shell 23 is provided with a heating air outlet 27 , and the heating air outlet 27 is arranged opposite to the air outlet 82 of the air hood 80 .

In some embodiments, in combination with FIG. 2 and FIG. 3 , a flow detection member 53 is further provided on the circulating heating pipeline. Specifically, the flow detection member 53 is used to detect the flow rate of the fluid in the circulating water circuit. In some embodiments, the flow detection member 53 is connected between the second flow end 32 and the fourth flow end 42. Specifically, the flow detection member 53 may be connected in series with the circulating pump 50 between the second flow end 32 and the fourth flow end 42. In another embodiment, the flow detection member 53 is connected between the first flow end 31 and the third flow end 41. Specifically, the flow detection member 53 may be connected in series with the circulating pump 50 between the first flow end 31 and the third flow end 41.

In some embodiments, a triggering cooperation is formed between the flow detection member 53 and the heating fan 83 to operate the heating fan 83 when the flow detection value detected by the flow detection member 53 is greater than the flow threshold. Specifically, when the flow detection value of the flow detection member 53 is greater than the flow threshold, the fluid in the circulating water circuit is in an obvious flow state. Since the heating fan 83 automatically responds to the operation when the fluid flows in the circulating water circuit, it is helpful to simplify the control operation of the gas heating device 100.

In some embodiments, as shown in FIG1 , the gas heating device 100 further includes a controller 54, a receiving terminal of the controller 54 being connected to a feedback terminal of the flow detection element 53 to receive a flow detection value output by the flow detection element 53. The controller 54 is also electrically connected to the heating fan 83, and when the flow detection value of the flow detection element 53 is greater than the flow threshold, the controller 54 sends an operation control signal to the heating fan 83 to operate the heating fan 83.

In some embodiments, as shown in FIG. 1 , the gas heating device 100 further includes an ignition needle 93. The ignition needle 93 is connected to the burner 92, and a discharge gap is formed between the end of the ignition needle 93 and the burner 92. A triggering coordination is formed between the flow detection member 53 and the ignition needle 93 so that a discharge arc is formed between the ignition needle 93 and the burner 92 when the flow detection value detected by the flow detection member 53 is greater than the flow threshold. Specifically, since the ignition needle 93 automatically responds and applies voltage to the burner 92 when the fluid flows in the circulating water circuit, it is helpful to simplify the control operation of the gas heating device 100. The user only needs to operate to trigger the operation of the circulating pump 50. More specifically, the controller 54 is electrically connected to the ignition needle 93 to output an ignition voltage to the ignition needle 93. In some embodiments, when the controller 54 detects that there is a flame signal in the ignition feedback needle, the controller 54 outputs a voltage and a PWM signal to control the heating fan 83 to operate.

In some embodiments, in combination with FIG. 1 and FIG. 2 , the gas heating device 100 further includes a combustion chamber 90 and a smoke exhaust pipe 91. The main heat exchanger 30 is accommodated in the combustion chamber 90. The smoke exhaust pipe 91 is connected to the internal space of the combustion chamber 90. Part of the outer wall of the combustion chamber 90 faces the partition 22. Specifically, the combustion chamber 90 is in the shell 20, and the main heat exchanger 30 and the burner 92 are in the combustion chamber 90. The main heat exchanger 30 is located above the burner 92. Along the relative direction between the main heat exchanger 30 and the burner 92, the main heat exchanger 30 and the burner 92 are spaced apart to form a combustion area between the two. Under the isolation effect of the combustion chamber 90, the high-temperature flue gas is prevented from directly contacting the shell 20, and the user is prevented from being scalded by the shell 20. The high-temperature flue gas finally leaves the internal space of the combustion chamber 90 from the smoke exhaust pipe 91. Since part of the wall surface of the combustion chamber 90 faces the partition plate 22 , there is a larger relative area between the combustion chamber 90 and the partition plate 22 , which is beneficial to increase the heat transferred from the combustion chamber 90 to the partition plate 22 .

In some embodiments, in combination with Figures 1 and 2, on the projection plane parallel to the partition 22, the projection area of the smoke exhaust pipe 91 is outside the projection area of the main heat exchanger 30. After the high-temperature flue gas penetrates the main heat exchanger 30, the high-temperature flue gas cannot directly leave the internal space of the combustion chamber 90 through the smoke exhaust pipe 91, but needs to flow horizontally along the top wall to the port of the smoke exhaust pipe 91 on one side, so that a larger portion of the high-temperature flue gas can contact the top wall of the combustion chamber 90, which is beneficial to increase the temperature of the top wall of the combustion chamber 90 and increase the heat transferred from the burner 92 cavity to the partition 22.

Further, in combination with FIG. 1 and FIG. 2 , the gas heating device 100 further includes an outer tube 96. Specifically, the outer tube 96 is arranged around the outer periphery of the smoke exhaust pipe 91. The inner circumference of the outer tube 96 is spaced apart from the outer circumference of the smoke exhaust pipe 91. The lower end of the outer tube 96 is connected to the partition 22, and the lower end of the outer tube 96 is connected to the first chamber 24. The outer tube 96 and the smoke exhaust pipe 91 extend to the outside of the housing 20, so that the external airflow can enter the first chamber 24 through the interval space between the outer tube 96 and the smoke exhaust pipe 91, providing sufficient air for the combustion of the gas. In some embodiments, the gas heating device 100 further includes a blower 97, the air outlet end of the blower 97 is connected to the combustion chamber 90, and the blower 97 blows the airflow of the first chamber 24 from the bottom of the burner 92 into the combustion chamber 90, thereby providing sufficient air for the combustion of the gas.

In some embodiments, as shown in FIG. 1 , the gas heating device 100 further includes an expansion water tank 71. The expansion water tank 71 has an inner cavity of elastically variable size, and a port of the expansion water tank 71 connected to the inner cavity is connected to at least one of the first flow end 31, the second flow end 32, the third flow end 41, and the fourth flow end 42. Specifically, by providing the expansion water tank 71, the pressure fluctuation in the circulating water circuit can be reduced, and fluid leakage caused by internal pressure fluctuation in the circulating water circuit can be avoided. Specifically, the expansion water tank 71 includes an expansion tank and other containers that can reduce fluid pressure fluctuations.

In some embodiments, after the gas heating device 100 is just installed or repaired and maintained, its circulating water circuit needs to be injected with fluid. In one embodiment, at this time, the fluid supply pipe is connected to another port of the first stop valve 60, and the first stop valve 60 is opened so that the first stop valve 60 is in a connected state and the second stop valve 70 is in a disconnected state. The fluid output by the fluid supply pipe flows into the circulating water circuit through the first stop valve 60. At the same time, the exhaust valve 62 is opened, and the air in the circulating water circuit is discharged from the overflow end of the exhaust valve 62. After observing the hydraulic detection member 61 until the pressure of the circulating water circuit reaches a predetermined value, the first stop valve 60 is closed, and the fluid injection operation is completed. More specifically, the fluid supply pipe is a tap water pipe.

In some embodiments, when the user makes a heating demand, the gas heating device 100 is started by operating the switch, and the circulating pump 50 starts to operate immediately, so that the fluid circulates in the circulating water circuit. The blower 97 operates synchronously to use wind power to clean the internal environment of the combustion chamber 90 in advance. When the flow detection component 53 detects that there is circulating fluid in the circulating water circuit, the signal is transmitted to the controller 54, and the controller 54 then outputs high voltage electricity to the ignition needle 93 for ignition. At the same time, the controller 54 controls the gas proportional valve 94 to open and delivers gas to the burner 92 for combustion. When the controller 54 detects that the feedback needle installed on the burner 92 has a flame signal, the controller 54 outputs a voltage and a PWM signal to control the heating fan 83 to operate. The heating fan 83 inhales the low-temperature airflow in the room through the shutter-type air vent 26 on the upper part of the shell 20. The low-temperature airflow is introduced into the second shell 23 and exchanges heat with the hot air heat exchanger 40. The heating fan 83 blows the hot air flow after heat exchange to the heating air outlet 27, so that the hot air flow is transported to the indoor environment.

In some embodiments, the gas heating device 100 further includes a temperature sensor 84 mounted on the wind cover 80, and the temperature sensor 84 is used to detect the outlet temperature of the heating fan 83. Specifically, by providing the temperature sensor 84, the temperature of the hot air can be detected, which is conducive to realizing the automatic operation adjustment of the gas heating device 100.

In some embodiments, the controller 54 detects the indoor temperature through the room temperature sensor 28 installed on the outside of the housing 20. In addition, the controller 54 obtains the temperature of the hot air flow through the temperature sensor 84 near the air outlet 82. After comparing the hot air detection temperature transmitted to the controller 54 by the temperature sensor 84, the indoor temperature and the user set temperature, the controller 54 automatically adjusts the opening of the gas proportional valve 94, the wind force of the blower 97, the wind force of the heating fan 83 and the speed of the circulation pump 50, and makes the indoor temperature relatively balanced with the user set temperature by increasing or decreasing the temperature of the hot air flow.

In some embodiments, the circulating water circuit of the gas heating device 100 needs to be drained of fluid before repair and maintenance. In one embodiment, the drain pipe is connected to another port of the second stop valve 70, and the second stop valve 70 is opened, so that the second stop valve 70 is in a connected state and the first stop valve 60 is in a blocked state. The fluid in the circulating water circuit and the expansion water tank 71 flows out through the second stop valve 70 and the drain pipe under the action of gravity.

The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, 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, they should be considered to be within the scope of this specification.

The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims (10)

1. A gas heating device, comprising: The main heat exchanger (30) is provided with a first flow-through end (31) and a second flow-through end (32) which are connected to each other; The wind hood (80) is provided with an air inlet (81) and an air outlet (82) which are connected to each other; a heating fan (83) is provided in the wind hood (80); A hot air heat exchanger (40) is accommodated in the wind cover (80); the hot air heat exchanger (40) is provided with a third flow end (41) and a fourth flow end (42) which are connected to each other; the fourth flow end (42) is connected to the second flow end (32); a circulation pump (50), one end of the circulation pump (50) being connected to the first flow-through end (31), and the other end of the circulation pump (50) being connected to the third flow-through end (41); A heating valve (501) is connected in series with the circulation pump (50) between the first flow-through end (31) and the second flow-through end (32); a water inlet pipe (601), the water inlet pipe (601) being in communication with the first flow-through end (31), and a first stop valve (60) being provided on the water inlet pipe (601); and A water outlet pipe (701), the water outlet pipe (701) being in communication with the second flow-through end (32), and a second stop valve (70) being provided on the water outlet pipe (701). 2. The gas heating device according to claim 1, characterized in that it also comprises a hydraulic detection member (61) arranged on the water inlet pipe (601). 3. The gas heating device according to claim 1, characterized in that the main heat exchanger (30), the hot air heat exchanger (40) and the circulating pump (50) form a circulating heating pipeline, and an exhaust valve (62) is provided on the circulating heating pipeline. 4. The gas heating device according to claim 3 is characterized in that a flow detection component (53) is also provided on the circulating heating pipeline; a triggering cooperation is formed between the flow detection component (53) and the heating fan (83) so that the heating fan (83) is operated when the flow detection value detected by the flow detection component (53) is greater than a flow threshold. 5. The gas heating device according to claim 1, characterized in that it further comprises a temperature sensor (84) arranged on the wind cover (80), wherein the temperature sensor (84) is used to detect the outlet air temperature of the heating fan (83). 6. The gas heating device according to claim 1, characterized in that it also includes a shell (20), the shell (20) includes a first shell (21), a partition (22) and a second shell (23); the partition (22) is arranged between the first shell (21) and the second shell (23); the partition (22) and the first shell (21) enclose a first chamber (24); the main heat exchanger (30) is accommodated in the first chamber (24); the partition (22) and the second shell (23) enclose a second chamber (25); the wind hood (80) is accommodated in the first chamber (24). 7. The gas heating device according to claim 6, characterized in that the second shell (23) is provided with a plurality of air vents (26) along the circumference of the hot air heat exchanger (40). 8. The gas heating device according to claim 6, characterized in that it also comprises a combustion chamber (90) and a smoke exhaust pipe (91); the main heat exchanger (30) is accommodated in the combustion chamber (90); and the smoke exhaust pipe (91) is connected to the internal space of the combustion chamber (90). 9. The gas heating device according to claim 1 is characterized in that it also includes a flow detection component (53), a burner (92) and an ignition needle (93); the ignition needle (93) is connected to the burner (92); a discharge gap is formed between the end of the ignition needle (93) and the burner (92); the flow detection component (53) is connected between the first flow end (31) and the third flow end (41), or the flow detection component (53) is connected between the second flow end (32) and the fourth flow end (42); a triggering cooperation is formed between the flow detection component (53) and the ignition needle (93) so that a discharge arc is formed between the ignition needle (93) and the burner (92) when the flow detection value detected by the flow detection component (53) is greater than a flow threshold. 10. The gas heating device according to claim 1, characterized in that it further comprises an expansion water tank (71) arranged on the water outlet pipe (701) or the water inlet pipe (601).