Gas water heating equipment

Abstract

The utility model discloses a fuel gas hot water equipment, including shell, main control panel, liquid level detection device and drain valve, the bottom wall of shell is provided with drain hole, main control panel is provided in the shell, the minimum distance between main control panel and shell bottom wall is the first distance, liquid level detection device is provided in the shell, the first distance is the first distance, and the second distance is the second distance. A second distance is formed between an induction part of the liquid level detection device and the bottom wall of the shell, the second distance is smaller than the first distance, the drainage valve is arranged on the bottom wall of the shell and used for opening or blocking the drainage hole, the liquid level detection device and the drainage valve are both electrically connected with the main control panel, and the main control panel is configured to control the drainage valve to open or close the drainage hole when receiving a water accumulation signal fed back by the liquid level detection device. The drainage valve is controlled to be opened, the drainage hole is opened, accumulated water in the shell is drained, potential safety hazards caused by short circuit of an internal circuit of the gas water heating equipment due to accumulated water are avoided, safety is improved, and maintenance cost is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to hot water equipment technology especially relates to a gas hot water equipment. BACKGROUND

[0002] The gas hot water equipment is a kind of gas appliance for preparing hot water by the heat transfer to the cold water of heat exchanger in the heating mode of combustion with gas as fuel.

[0003] The main control board is arranged in the gas hot water equipment, and line and electronic component are arranged on the main control board, and the main control board is used to control the action of each component (for example, gas valve, water pump, fan etc.) in the gas hot water equipment.With the increase of service life of the gas hot water equipment, the sealing element of the part connected by water pipe and heat exchanger can be aged, and the temperature of the position changes frequently, which can also affect the service life of the sealing element.When its sealing performance declines, it can cause the leakage of the part connected by water pipe and heat exchanger, and the water level in the shell of the gas hot water equipment rises, and if it cannot be discharged in time, the water level rise can cause the short-circuit safety hazard of the main control board and other electronic components.

[0004] The existing solution is to use pressure sensor to detect the change of pipeline water pressure, for example, when the pipeline leaks, the pipeline water pressure becomes smaller, the main control board receives the water pressure signal to perform corresponding action, and the gas hot water equipment stops running to carry out maintenance, but the above-mentioned scheme is affected by the change of pipeline pressure when using water, and it is easy to cause the gas hot water equipment to stop or not to stop, and the accuracy is poor, and there is also the safety hazard of short circuit. UTILITY MODEL CONTENTS

[0005] The utility model solves the technical problem to provide a kind of gas hot water equipment, to accurately detect the waterlogging of the shell bottom of gas hot water equipment, and discharge in time, avoid the safety hazard of internal circuit short circuit of gas hot water equipment due to waterlogging, improve safety.

[0006] The above technical problem is solved by the following technical scheme:

[0007] A kind of gas hot water equipment, comprising:

[0008] Shell, drain hole is arranged on the bottom wall of the shell;

[0009] Main control board, the main control board is arranged in the shell, and the minimum distance between the main control board and the bottom wall of the shell is first distance;

[0010] Liquid level detection device, the liquid level detection device is arranged in the shell, and the inductive part of the liquid level detection device is second distance apart from the bottom wall of the shell, and the second distance is less than the first distance;

[0011] A drain valve is arranged on the bottom wall of the shell and is used to open or block the drain hole;

[0012] The liquid level detection device and the drain valve are electrically connected with the main control board, and the main control board is configured to control the drain valve to open when receiving the water accumulation signal fed back by the liquid level detection device.

[0013] The gas water heating equipment provided by the utility model, including shell, main control board, liquid level detection device and drain valve, main control board sets up in the shell, the minimum distance of main control board and the bottom wall of shell is first distance, liquid level detection device sets up in the shell, the induction part of liquid level detection device is apart from the bottom wall of shell second distance, second distance is less than first distance, drain valve sets up on the bottom wall of shell, the bottom wall of shell is provided with drain hole, drain valve is used to open or block drain hole, liquid level detection device and drain valve are electrically connected with main control board, and the main control board is configured to control the drain valve to open when receiving the water accumulation signal fed back by the liquid level detection device, so that the drain hole is opened, the water accumulation in the shell is discharged, and the safety hidden danger caused by the water accumulation short circuit of the internal circuit of the gas water heating equipment is avoided. Compared with using the pressure sensor to detect the change of pipeline water pressure, the utility model has higher detection water leakage accuracy, improves safety, and reduces maintenance cost.

[0014] In some embodiments of the utility model, the drain valve includes a valve body, a valve core and a first fixing part, the valve core is arranged inside the valve body, the first fixing part is fixedly connected with the valve body, and the valve body is connected with the bottom wall of the shell through the first fixing part;

[0015] One end of the valve body is provided with at least one drain port, and the drain port is located in the inner cavity of the shell.

[0016] The valve core is controlled to block the drain port or connect the drain port with the inside of the valve body.

[0017] In some embodiments of the utility model, the drain port is apart from the bottom wall of the shell by a third distance, and the third distance is less than the second distance.

[0018] In some embodiments of the utility model, the liquid level detection device further includes a second fixing part, the second fixing part is fixed on the bottom wall of the shell, and the induction part is arranged on the second fixing part.

[0019] In some embodiments of the utility model, the bottom wall of the shell is provided with a mounting base, the main control board is mounted on the mounting base, and the main control board is perpendicular to the bottom wall of the shell.

[0020] In some embodiments of the utility model, the gas hot water equipment further includes a power connection box, the power connection box is arranged on the bottom wall of the shell, and the liquid level detection device is installed on the power connection box through the mounting bracket.

[0021] In some embodiments of the utility model, the minimum distance between the power connection box and the bottom wall of the shell is a fourth distance, and the fourth distance is greater than the second distance.

[0022] In some embodiments of the utility model, the liquid level detection device is a liquid level sensor or a liquid level meter.

[0023] In some embodiments of the utility model, the gas hot water equipment is a gas water heater.

[0024] In some embodiments of the utility model, the gas hot water equipment is a full premix gas heating water stove, and the full premix gas heating water stove further includes a water pump arranged on the inner bottom wall of the shell. BRIEF DESCRIPTION OF DRAWINGS

[0025] The utility model will be further explained in detail below according to the drawings and embodiments.

[0026] Figure 1 A structure schematic view of a gas hot water equipment provided by the utility model is shown in the figure.

[0027] Figure 2 A structure schematic view of a gas hot water equipment provided by the utility model is shown in the figure. Figure 1 A partial enlarged view of the gas hot water equipment.

[0028] Figure 3 A structure schematic view of a gas hot water equipment provided by the utility model is shown in the figure.

[0029] Label explanation:

[0030] 110, shell; 1651, air inlet end; 1652, gas inlet end; 111, inner cavity; 112, bottom wall; 113, drain hole; 161, premixing chamber; 162, combustion chamber; 163, heat exchanger; 164, water pump; 165, fan; 166, igniter; 167, gas valve; 1631, condensate water drain pipeline; 120, main control board; 121, mounting base; 130, liquid level detection device; 131, sensing part; 132, second fixed part; 133, mounting bracket; 140, drain valve; 141, valve body; 142, first fixed part; 1411, drain port; 150, power connection box. DETAILED DESCRIPTION

[0031] In order to make the technical problems solved by the utility model, the technical scheme adopted and the technical effects reached more clear, the technical scheme of the utility model embodiment will be further described in detail below with reference to the drawings. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative labor belong to the protection scope of the utility model.

[0032] In the description of the utility model, unless explicitly defined and limited, the terms "connected", "connected", "fixed" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements or the interaction relationship between two elements. For the person skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0033] In the utility model, unless explicitly defined and limited, the first feature "on" or "below" the second feature can include that the first and second features are in direct contact, or the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the first feature "on", "above" and "on" the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature. In addition, the terms "first", "second" are only used to distinguish in the description, and have no special meaning.

[0034] Figure 1 A structural schematic view of a gas water heating equipment provided by the utility model, Figure 2 For Figure 1 A partial enlarged view of the gas water heating equipment, the enlarged area is Figure 1 A region shown in A region shown in Figure 1 , 2 As shown in the drawings, the gas water heating equipment comprises:

[0035] The shell 110, for example, the gas water heating equipment is a full premix gas heating water heater, and the shell 110 encloses to form a closed inner cavity 111.

[0036] The main control board 120 is arranged in the inner cavity 111 formed by the shell 110, and the minimum distance between the main control board 120 and the bottom wall 112 of the shell 110 is a first distance L1. The main control board 120 can be provided with electronic elements and circuits. Among them, the bottom wall 112 is the part of the shell with the lowest vertical height when the gas water heater is placed in a working state (such as the placement shown in Figure 1 When the gas water heater leaks internally, water will gather on the bottom wall 112 under the action of gravity.

[0037] The liquid level detection device 130 is arranged in the inner cavity 111 formed by the shell 110, and the liquid level detection device 130 includes a sensing portion 131, the sensing portion 131 is away from the bottom wall 112 by a second distance L2, the second distance L2 is less than the first distance L1, which ensures that the water surface is detected by the liquid level detection device 130 before it contacts the main control board 120. For example, the liquid level detection device 130 is electrically connected to the main control board 120, and when the sensing portion 131 of the liquid level detection device 130 contacts the water surface, it will feed back a water accumulation signal to the main control board 120.

[0038] The drain valve 140 is arranged on the bottom wall 112 of the shell 110, and the bottom wall 112 of the shell 110 is provided with a drain hole 113, and the drain valve 140 is used to open or block the drain hole 113.

[0039] The liquid level detection device 130 and the drain valve 140 are electrically connected to the main control board 120, and the main control board 120 is configured to control the drain valve 140 to open when receiving the water accumulation signal fed back by the liquid level detection device 130. For example, if the gas water heater leaks internally, as water accumulates on the bottom wall 112, the water surface gradually rises, when the water surface contacts the sensing portion 131 of the liquid level detection device 130, the liquid level detection device 130 feeds back a water accumulation signal to the main control board 120, and the main control board 120 controls the drain valve 140 to open, so that the drain hole 113 is opened, and the water accumulated in the shell 110 is drained, avoiding the safety hazard caused by the short circuit of the internal circuit of the gas water heater due to water accumulation, improving safety, and also avoiding damage to the main control board 120, reducing maintenance cost.

[0040] The gas-fired water heater provided by this utility model includes a housing 110, a main control board 120, a liquid level detection device 130, and a drain valve 140. A drain hole 113 is provided on the bottom wall of the housing 110. The main control board 120 is disposed inside the housing 110, and the minimum distance between the main control board 120 and the bottom wall of the housing 110 is a first distance. The liquid level detection device 130 is disposed inside the housing 110, and the sensing part 131 of the liquid level detection device 130 is a second distance from the bottom wall of the housing 110, the second distance being less than the first distance. The drain valve 140 is located on the bottom wall of the housing 110 and is used to open or block the drain hole 113. The liquid level detection device 130 and the drain valve 140 are both electrically connected to the main control board 120. The main control board 120 is configured to control the drain valve 140 to open when it receives a water accumulation signal from the liquid level detection device 130, so that the drain hole 113 is opened and the water inside the housing 110 is discharged. This avoids the safety hazards caused by short circuits in the internal circuit of the gas water heater due to water accumulation, improves safety, and reduces maintenance costs.

[0041] Specifically, in this embodiment, the liquid level detection device 130 is a liquid level sensor, for example, the model of the liquid level sensor is FS-IR1902D-H;

[0042] In other embodiments, the level detection device 130 may also be a level gauge.

[0043] Figure 3 A schematic diagram of the structure of a drain valve provided by this utility model is shown below. Figure 3 As shown, the drain valve 140 includes a valve body 141, a valve core (not shown in the figure), and a first fixing part 142. The valve core is disposed inside the valve body 141, and the first fixing part 142 is fixedly connected to the valve body 141. The valve body 141 is connected to the bottom wall 112 of the housing 110 through the first fixing part 142. For example, the first fixing part 142 is a fixing plate, and the fixing plate is provided with a plurality of screw holes, and screws are inserted in the screw holes to fix the valve body 141 to the bottom wall 112.

[0044] One end of the valve body 141 is provided with at least one drain port 1411, the drain port 1411 is located in the inner cavity 111 of the shell 110, the other end of the valve body 141 is arranged in the drain hole 113 on the bottom wall 112 of the shell 110. The valve core is controlled to block the drain port 1411 or connect the drain port 1411 with the inside of the valve body 141. Exemplarily, the valve core has a drain position and a block position, before the liquid level of the accumulated water in the shell 110 contacts the sensing part 131 of the liquid level detection device 130, the valve core is in the block position, and the drain port 1411 is blocked; when the liquid level of the accumulated water in the shell 110 contacts the sensing part 131 of the liquid level detection device 130, the liquid level detection device 130 feeds back the accumulated water signal to the main control board 120, and the main control board 120 controls the valve core of the drain valve 140 to switch to the drain position, the drain port 1411 is opened, and the drain port 1411 is connected with the inside of the valve body 141, so that the accumulated water can be discharged through the drain valve 140.

[0045] It should be noted that, in the embodiment, the drain valve 140 can adopt an existing electric switch valve or electromagnetic switch valve, and the working principle of the electric switch valve or electromagnetic switch valve will not be described here.

[0046] In some embodiments of the utility model, as shown in Figure 2 The drain port 1411 is away from the bottom wall 112 of the shell 110 by a third distance L3, and the third distance L3 is less than the second distance L2, so that after drainage, the liquid level of residual accumulated water does not contact the main control board 120.

[0047] In some embodiments of the utility model, as shown in Figure 1 The bottom wall 112 of the shell 110 is provided with a mounting base 121, and the main control board 120 is mounted on the mounting base 121, and the main control board 120 is perpendicular to the bottom wall 112 of the shell 110, that is, the main control board 120 is perpendicular to the horizontal plane and parallel to the horizontal direction X.

[0048] In some embodiments of the utility model, as shown in Figure 2 The liquid level detection device 130 comprises a second fixing part 132 and a sensing part 131, the second fixing part 132 is fixed on the bottom wall 112 of the shell 110, and the sensing part 131 is arranged on the second fixing part 131.

[0049] In some embodiments of the utility model, as shown in Figure 1 , 2As shown, the gas water heating equipment further comprises a power terminal box 150, and a power board and a terminal are arranged in the power terminal box 150, and the power terminal box 150 is used for converting the voltage of an external power supply into the voltage required by the gas water heating equipment. Exemplarily, the power terminal box 150 is arranged on the bottom wall 112 of the shell 110, and the liquid level detection device 130 is mounted on the power terminal box 150 through a mounting bracket 133. Exemplarily, the second fixing part 132 of the liquid level detection device 130 is connected with the mounting bracket 133, and the mounting bracket 133 is fixed on the power terminal box 150.

[0050] In some embodiments of the utility model, the minimum distance between the power terminal box 150 and the bottom wall 112 of the shell 110 is a fourth distance L4, and the fourth distance L4 is greater than the second distance L2, so that the liquid level of the accumulated water is detected by the liquid level detection device 130 before the liquid level of the accumulated water contacts the power terminal box 150, the power supply circuit in the power terminal box 150 is prevented from being short-circuited, and the safety performance is improved.

[0051] In some embodiments of the utility model, the gas water heating equipment is a full premix gas heating water heater, and the full premix gas heating water heater adopts a special combustion mode, and gas and air are fully mixed before combustion. This mixing process is usually carried out in front of the combustion chamber nozzle, and the gas molecules are fully stirred and mixed through a premixing cavity, so that the mixing is more complete, and the combustion speed is faster and the efficiency is higher. Compared with a non-full premix equipment, the full premix gas heating water heater reduces the structure of the air tank, so that the internal space is more compact and reasonable. Because the structure of the air tank is reduced, the electronic elements such as the heat exchanger, the water pump, the gas proportional valve and the main control board of the full premix gas heating water heater are in the same space and are not separated by a partition. The box body of the full premix gas heating water heater is a space, and the box body is airtight. Once water leakage occurs in the box body, the accumulated water cannot be discharged, and the water level rises, so that the main control board and other electronic elements are soaked in water, the main control board is short-circuited, and a safety hazard is caused. Therefore, the full premix gas heating water heater adopts the scheme of the utility model, when the main control board receives the accumulated water signal fed back by the liquid level detection device, the main control board controls the opening of the drain valve, so that the drain hole is opened, the accumulated water in the shell is discharged, and the safety hazard caused by the short circuit of the internal circuit of the full premix gas heating water heater due to the accumulated water is avoided, and the safety performance is improved.

[0052] Exemplarily, as shown in the figure, Figure 1 As shown, the full premix gas heating water heater further comprises a premixing chamber 161, a combustion chamber 162, a heat exchanger 163, a water pump 164, a fan 165, an igniter 166 and a gas valve 167 arranged in the shell 110, and the water pump 164, the fan 165, the igniter 166 and the gas valve 167 are electrically connected with the main control board 120.

[0053] Exemplarily, as shown in the figure, Figure 1As shown, along the width direction of the shell 110, i.e. along the X direction, the water pump 164 is located between the liquid level detection device 130 and the drain valve 140, and the drain valve 140 is located between the main control board 120 and the water pump; in this way, the water pump 164 has a larger vibration at the connection with the pipeline, and thus has a higher risk of water leakage than other pipeline connections; by arranging the water pump 164 between the liquid level detection device 130 and the drain valve 140, once the water pump 164 leaks at the connection with the pipeline, the sensing part of the liquid level detection device 130 can quickly detect the water accumulation signal and control the drain valve 140 to open, and the drain valve 140 is located between the main control board 120 and the water pump, i.e. after the drain valve 140 is opened, the water accumulated below the water pump 164 can be timely drained, so as to avoid the water level rising to the main control board 120 and better protect the normal work of the main control board 120.

[0054] The bottom wall 112 of the shell 110 is provided with an air inlet end 1651 and a gas inlet end 1652, the air inlet of the fan 165 is communicated with the air inlet end 1651 through an air inlet pipe, and the gas inlet of the fan 165 is communicated with the gas inlet end 1652 through a gas inlet pipe, the air outlet of the fan 165 is communicated with the premixing chamber 161, and the gas valve 167 is arranged on the gas inlet pipe.

[0055] The combustion chamber 162 is arranged below the heat exchanger 163, the combustion chamber 162 is provided with a burner, and the burner is communicated with the premixing chamber 161. The igniter 166 is arranged on the combustion chamber 162.

[0056] For example, when the main control board 120 receives a heating demand, the fan 165 is controlled to start and perform pre-blowing to remove residual gas in the device, and the system performs self-checking. After the self-checking is completed, the water pump 164 is controlled to start, the gas valve 167 is opened, and the igniter 166 is controlled to ignite. The gas and air are fully mixed in the premixing chamber 161 and are sent into the combustion chamber 162 to be ignited. When a flame signal is detected, it is considered that the ignition is successful. The high-temperature flue gas generated by combustion heats the water flowing through the heat exchanger 163.

[0057] When water pipe and heat exchanger 163 connecting part leaks due to aging or thermal expansion and contraction of sealing element and the like, because the full premix gas heating water heater is good in sealing, the accumulated water cannot be discharged and will gather in the bottom wall 112 of the shell 110. When the liquid level contacts the sensing part 131 of the liquid level detection device 130, the liquid level detection device 130 feeds back the accumulated water signal to the main control panel 120, and after the main control panel 120 receives the accumulated water signal, the gas valve 167 is controlled to be closed, the fan 165 is controlled to be back purged, the residual gas in the equipment is avoided, the water pump 164 is controlled to be immediately stopped, the increase of the accumulated water is reduced, and the valve core of the drain valve 140 is switched to the drain position, the drain opening 1411 is opened, the drain opening 1411 and the inside of the valve body 141 are communicated, the accumulated water can be discharged through the drain opening 1411 of the drain valve 140, the rising of the accumulated water level is slowed down, the electronic elements such as the main control panel 120 are prevented from being damaged by contacting the accumulated water, the maintenance cost is reduced, and the safety is improved.

[0058] In some embodiments of the present application, as shown in Figure 1 As shown in the figure, the heat exchanger 163 is provided with a condensate collecting groove, and the condensate collecting groove is communicated with the inner cavity 111 of the shell 110 through a condensate drainage pipeline 1631. As an example, a small amount of water vapor exists in the high-temperature exhaust gas generated after combustion in the combustion chamber 162, and the water vapor is condensed into condensate when contacting the heat exchanger 163 with lower temperature. In the condensation process, the water vapor releases heat, and this part of heat can also be used to heat the water flow in the heat exchanger 163, thereby improving the heat utilization efficiency. The condensate is gathered in the condensate collecting groove and discharged to the bottom wall 112 of the shell 110 through the condensate drainage pipeline 1631. With the gathering of the condensate, the liquid level gradually rises, and when the liquid level contacts the sensing part 131 of the liquid level detection device 130, the liquid level detection device 130 feeds back the accumulated water signal to the main control panel 120, and the main control panel 120 controls the drain valve 140 to be opened, so that the drain hole 113 is opened and the accumulated water in the shell 110 is discharged.

[0059] In some embodiments of the present application, the gas water heating equipment is a non-full premix gas water heater, and the gas water heater further comprises a combustion chamber, a heat exchanger, a water pump, a fan, an igniter and a gas valve arranged in the shell, and the water pump, the fan, the igniter and the gas valve are electrically connected with the main control panel.

[0060] The combustion chamber is arranged below the heat exchanger, a burner is arranged in the combustion chamber, an air inlet is arranged on the bottom wall of the shell, the air inlet of the burner is communicated with the air inlet through an air inlet pipe, and a gas valve is arranged on the air inlet pipe. An igniter is arranged on the combustion chamber. A water inlet and a water outlet are arranged on the bottom wall of the shell, the water inlet of the water pump is communicated with the water inlet through a water inlet pipe, the water outlet of the water pump is connected with the water inlet of the heat exchanger, and the water outlet of the heat exchanger is communicated with the water outlet through a water outlet pipe. The air inlet of the fan is communicated with the combustion chamber, and the air outlet of the fan is communicated with the exhaust pipe of the gas water heater.

[0061] For example, when the bathroom water demand is received, the main control board controls the fan to start and pre-blow to remove the residual gas in the device, and the system is self-checked. After the self-checking is completed, the water pump is started, the gas valve is opened, and the igniter is ignited. The gas and air are sent into the combustion chamber and ignited. When the flame signal is detected, it is considered that the ignition is successful. The high-temperature flue gas generated by combustion heats the water flowing in the heat exchanger.

[0062] When the water pipe and the heat exchanger connection part leak due to aging or thermal expansion and contraction of the sealing element, the accumulated water cannot be immediately discharged and will gather on the bottom wall of the shell. When the liquid level contacts the sensing part of the liquid level detection device, the liquid level detection device feeds back the accumulated water signal to the main control board. After receiving the accumulated water signal, the main control board controls the gas valve to close, controls the fan to blow, avoids the residual gas in the device, controls the water pump to stop immediately, reduces the continuous increase of the accumulated water, simultaneously controls the valve core of the drain valve to switch to the drain position, opens the drain hole, connects the drain hole and the inside of the valve body, enables the accumulated water to be discharged through the drain port of the drain valve, slows down the rising of the accumulated water level, prevents the main control board and other electronic elements from being damaged due to contact with the accumulated water, reduces the maintenance cost, and improves the safety.

[0063] In the description herein, it should be understood that the orientation or position relationship of the terms "bottom", "inner" and the like is based on the orientation or position relationship shown in the drawings, and is only for the convenience of description and simplification of operation, 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 utility model.

[0064] In the description of the present specification, the description referring to the terms "an embodiment", "an example" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the utility model. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example.

[0065] In addition, it should be understood that, although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the description of the specification is only for the sake of clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can be appropriately combined to form other embodiments that those skilled in the art can understand.

[0066] The technical principles of the present application are described above in combination with specific embodiments. These descriptions are only for the purpose of explaining the principles of the present application, and cannot be interpreted in any way as a limitation on the scope of protection of the present application. Based on the explanation here, those skilled in the art can think of other specific embodiments of the present application without creative labor, and these ways will fall within the scope of protection of the present application.

Claims

1. A gas water heating apparatus, characterised in that, The utility model relates to a kind of water level detection device and water drainage valve, including: Shell (110), the bottom wall (112) of the shell (110) is provided with drain hole (113); Main control board (120), the main control board (120) is arranged in the shell (110), and the minimum distance between the main control board (120) and the bottom wall (112) of the shell (110) is first distance; Liquid level detection device (130), the liquid level detection device (130) is arranged in the shell (110), and the inductive part (131) of the liquid level detection device (130) is second distance from the bottom wall (112) of the shell (110), and the second distance is less than the first distance; Drain valve (140), the drain valve (140) is arranged on the bottom wall (112) of the shell (110), for opening or blocking drain hole (113); The liquid level detection device (130) and the drain valve (140) are electrically connected with the main control board (120), and the main control board (120) is configured to control the drain valve (140) to open when receiving the waterlogging signal fed back by the liquid level detection device (130).

2. Gas water heating apparatus according to claim 1, characterised in that The drain valve (140) includes valve body (141), valve core and first fixed part (142), the valve core is arranged inside the valve body (141), the first fixed part (142) is fixedly connected with the valve body (141), and the valve body (141) is connected with the bottom wall (112) of the shell (110) by the first fixed part (142); One end of the valve body (141) is provided with at least one drain port (1411), and the drain port (1411) is located in the inner cavity (111) of the shell (110), and the other end of the valve body (141) is arranged in the drain hole (113) on the bottom wall (112) of the shell (110); The valve core is controlled to block the drain port (1411) or connect the drain port (1411) with the inside of the valve body (141).

3. Gas water heating apparatus according to claim 2, characterised in that, The drain port (1411) is third distance from the bottom wall (112) of the shell (110), and the third distance is less than the second distance.

4. The gas water heating apparatus according to claim 1, characterized by The liquid level detection device further includes second fixed part (132), and the second fixed part (132) is fixed on the bottom wall (112) of the shell (110), and the inductive part (131) is arranged on the second fixed part (132).

5. The gas water heating apparatus according to claim 1, characterized by The bottom wall (112) of the shell (110) is provided with mounting base (121), and the main control board (120) is mounted on the mounting base (121), and the main control board (120) is perpendicular to the bottom wall (112) of the shell (110).

6. The gas water heating apparatus according to claim 1, characterized by Further include power connection box (150), the power connection box (150) is arranged on the bottom wall (112) of the shell (110), and the liquid level detection device (130) is mounted on the power connection box (150) by mounting support (133).

7. Gas water heating apparatus according to claim 6, characterised in that, The minimum distance between the power junction box (150) and the bottom wall (112) of the shell (110) is a fourth distance, which is greater than the second distance.

8. The gas water heating apparatus according to claim 1, characterized by The liquid level detection device (130) is a liquid level sensor or a liquid level gauge.

9. Gas water heating apparatus according to any of claims 1-8, characterized in that The gas water heating device is a gas water heater.

10. Gas water heating apparatus according to any one of claims 1 to 8, characterised in that, The gas water heating device is a full premix gas heating water heater, which further comprises a water pump (164) arranged on the bottom wall in the shell (110); along the width direction of the shell (110), the water pump (164) is located between the liquid level detection device (130) and the drain valve (140), and the drain valve (140) is located between the main control board (120) and the water pump (164).

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