Gas wall-hanging stove

Abstract

The utility model belongs to the technical field of fuel gas equipment, and particularly discloses a fuel gas wall-hanging stove which comprises a first heat exchanger, a water pump with adjustable rotating speed, a bathroom water inlet pipe, a bathroom water outlet pipe, a temperature detection module and a control module, and the temperature detection module is arranged on the bathroom water inlet pipe; the first heat exchanger comprises a bathroom water heat exchange channel, and the bathroom water heat exchange channel communicates with a bathroom water inlet pipe and a bathroom water outlet pipe to form a bathroom water path. The water pump is arranged on a bathroom waterway, the control module is electrically connected with the temperature detection module and the water pump, and the control module is configured to adjust the rotating speed of the water pump according to the water inlet temperature; according to the gas wall-hanging stove, rotation of the water pump is improved, the flowing speed of bathroom water in the bathroom water path can be increased, the water flow in the bathroom water path can be increased, the heat exchange time of the bathroom water in the bathroom water heat exchange channel is shortened, the heat absorbed by the bathroom water in the bathroom water heat exchange channel is reduced, and therefore the water outlet temperature of the bathroom water outlet pipe is reduced, and the situation that outlet water is too hot is effectively prevented.

Description

TECHNICAL FIELD

[0001] The utility model relates to gas equipment technical field especially relates to a gas wall -hanging stove. BACKGROUND

[0002] The gas wall-hanging stove has powerful home central heating function, can satisfy the heating demand of multi-room, and also can take into account hot water bathing function.

[0003] In the related art, the gas wall-hanging stove is simple, and only a plate heat exchanger is used to heat bathroom water, and the bathroom water is directly flowed to a water using point through a bathroom outlet pipe after being heated by the plate heat exchanger, when the water inlet temperature of the bathroom is high in summer, the water outlet temperature of the bathroom outlet pipe is obviously higher than the set temperature when the gas wall-hanging stove is combusted at minimum load, and the bathroom water flowed from the water using point is too hot, which affects user experience. UTILITY MODEL CONTENTS

[0004] The utility model solves the technical problem that the gas wall-hanging stove can effectively solve the problem that the bathroom water flowed from the water using point is too hot.

[0005] The above technical problem is solved by the following technical scheme:

[0006] A gas wall-hanging stove, comprising a first heat exchanger, a water pump with adjustable rotating speed, a bathroom water inlet pipe, a bathroom water outlet pipe, a temperature detection module and a control module, the temperature detection module is arranged on the bathroom water inlet pipe and is used for detecting water inlet temperature, the first heat exchanger comprises a bathroom water heat exchange channel, the bathroom water heat exchange channel is communicated with the bathroom water inlet pipe and the bathroom water outlet pipe to form a bathroom water circuit, the water pump is arranged on the bathroom water circuit, the control module is electrically connected with the temperature detection module and the water pump, and the control module is configured to adjust the rotating speed of the water pump according to the water inlet temperature to adjust water outlet temperature of the bathroom water outlet pipe.

[0007] Compared with the background art, the gas wall-hanging stove has the beneficial effects that:

[0008] By setting a water pump with adjustable rotating speed in the bathroom water circuit, when the control module determines that the temperature detection module detects that the water inlet temperature of the bathroom water inlet pipe is too high, at this time even if the device is burning at the minimum load, the water outlet temperature of the bathroom water outlet pipe is obviously higher than the set temperature, then the control module controls the water pump to increase the rotating speed, so as to increase the bathroom water flow rate in the bathroom water circuit and increase the water flow in the bathroom water circuit, thereby reducing the heat exchange time and heat absorbed by the bathroom water in the bathroom water heat exchange channel, so as to reduce the water outlet temperature of the bathroom water outlet pipe; when the control module determines that the temperature detection module detects that the water inlet temperature of the bathroom water inlet pipe is reduced, then the control module controls the water pump to reduce the rotating speed, so as to reduce the bathroom water flow rate in the bathroom water circuit and reduce the water flow in the bathroom water circuit, thereby increasing the heat exchange time and heat absorbed by the bathroom water in the bathroom water heat exchange channel, so as to increase the water outlet temperature of the bathroom water outlet pipe; that is, the gas wall-hanging stove with the above hardware architecture is beneficial to prevent the situation that the bathroom water flowing out of the water use point is too hot, while ensuring the user's hot water use experience.

[0009] In one of the embodiments, the control module comprises a main control chip and a frequency converter, and the main control chip is configured to adjust the input power frequency of the motor of the water pump through the frequency converter; or, the control module comprises a main control chip and an adjustable resistor, and the main control chip is configured to adjust the input current or voltage of the motor of the water pump through the adjustable resistor.

[0010] In one of the embodiments, the water pump comprises a motor, a transmission and an impeller, and the motor is connected with the impeller through the transmission.

[0011] In one of the embodiments, the gas wall-hanging stove further comprises a proportional valve, and the proportional valve is arranged on the bathroom water circuit.

[0012] In one of the embodiments, along the water flow direction, the proportional valve and the water pump are arranged in sequence on the water circuit between the water inlet of the bathroom water inlet pipe and the water inlet of the bathroom water heat exchange channel; or, along the water flow direction, the proportional valve and the water pump are arranged in sequence on the water circuit between the water outlet of the bathroom water heat exchange channel and the water outlet of the bathroom water outlet pipe.

[0013] In one of the embodiments, the gas wall-hanging stove further comprises:

[0014] a one-way valve arranged on the bathroom water circuit, and the one-way valve is configured to allow the bathroom water in the bathroom water circuit to flow from the bathroom water inlet pipe to the bathroom water outlet pipe only;

[0015] and / or a flow sensor arranged on the bathroom water circuit.

[0016] In one of the embodiments, the first heat exchanger further comprises a first heat exchange channel;

[0017] The gas wall-hanging stove further comprises a second heat exchanger, a heating outlet water pipe, a heating return water pipe and a water path valve group, the water path valve group comprises a valve, and the second heat exchanger comprises a second heat exchange channel.

[0018] The water outlet of the first heat exchange channel is communicated with the return water outlet of the second heat exchange channel through the heating return water pipe, the first valve port of the valve is communicated with the water outlet of the second heat exchange channel through the heating outlet water pipe, and the second valve port of the valve is communicated with the water inlet of the first heat exchange channel.

[0019] In one of the embodiments, the valve is a three-way valve, a third valve port of the valve is used for being communicated with a return water outlet of a heater, and the heating return water pipe is further used for being communicated with a water outlet of the heater.

[0020] In one of the embodiments, the water path valve group further comprises a water outlet connector;

[0021] The bathroom outlet water pipe is communicated with the bathroom water heat exchange channel through the water outlet connector.

[0022] In one of the embodiments, the gas wall-hanging stove further comprises a water path adapter, the water path adapter comprises a water inlet connector and a three-way connector;

[0023] The bathroom inlet water pipe is communicated with the bathroom water heat exchange channel through the water inlet connector;

[0024] The first one of the three interfaces of the three-way connector is communicated with the water outlet of the first heat exchange channel, the second one is communicated with the return water outlet of the second heat exchange channel through the heating return water pipe, and the third one is communicated with the water outlet of the heater through the heating return water pipe. BRIEF DESCRIPTION OF DRAWINGS

[0025] Fig. 1 Part structure schematic view of the gas wall-hanging stove provided by the utility model;

[0026] Fig. 2 Part structure explosion view of the gas wall-hanging stove provided by the utility model;

[0027] Fig. 3 Structure schematic view of the gas wall-hanging stove provided by the utility model.

[0028] REFERENCE SIGNS:

[0029] 100, first heat exchanger;

[0030] 200, water pump;

[0031] 310, bathroom inlet water pipe; 320, bathroom outlet water pipe;

[0032] 400, temperature detection module;

[0033] 500, proportional valve;

[0034] 600, second heat exchanger; 610, burner; 620, heater;

[0035] 710, heating outlet pipe; 720, heating return pipe;

[0036] 810, waterway adapter; 811, water inlet joint; 812, tee joint; 820, waterway valve group; 821, valve; 822, water outlet joint. DETAILED DESCRIPTION

[0037] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the present application.

[0038] The terms "first", "second", "third" are only used for descriptive purpose, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second", "third" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise specified.

[0039] In the description of the present application, it should be noted that, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connection" should be understood in a broad sense, for example, can be fixed connection, can also be detachable connection, or integral connection; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be the communication inside two elements. For those of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0040] Reference Figs. 1-3As shown, the embodiment provides a gas wall-hanging stove, which comprises a first heat exchanger 100, a water pump 200 with adjustable rotating speed, a bathroom water inlet pipe 310, a bathroom water outlet pipe 320, a temperature detection module 400 and a control module (not shown). The temperature detection module 400 is arranged on the bathroom water inlet pipe 310 and is used to detect the water inlet temperature. The first heat exchanger 100 comprises a bathroom water heat exchange channel, which is in communication with the bathroom water inlet pipe 310 and the bathroom water outlet pipe 320 to form a bathroom water circuit. The water pump 200 is arranged on the bathroom water circuit. The control module is electrically connected with the temperature detection module 400 and the water pump 200. The control module is configured to adjust the rotating speed of the water pump 200 according to the water inlet temperature, so as to adjust the water outlet temperature of the bathroom water outlet pipe 320.

[0041] In the embodiment, the bathroom water outlet pipe 320 is used to communicate with a water point, such as a shower. In summer, the water inlet temperature of the bathroom water inlet pipe 310 is relatively high, and the water outlet preset temperature of the bathroom water outlet pipe 320 is relatively low. By arranging the water pump 200 with adjustable rotating speed on the bathroom water circuit, when the control module determines that the water inlet temperature of the bathroom water inlet pipe 310 detected by the temperature detection module 400 is too high, the control module can control the water pump 200 to increase the rotating speed, so as to increase the flow rate of the bathroom water in the bathroom water circuit and increase the water flow in the bathroom water circuit, thereby reducing the heat exchange time of the bathroom water in the bathroom water heat exchange channel and the heat absorbed by the bathroom water, so as to reduce the water outlet temperature of the bathroom water outlet pipe 320, and effectively prevent the situation that the bathroom water flowing out of the water point is too hot. That is, the gas wall-hanging stove with the above hardware architecture is beneficial to prevent the situation that the bathroom water flowing out of the water point is too hot.

[0042] For example, when the control module determines that the water inlet temperature of the bathroom water inlet pipe 310 detected by the temperature detection module 400 is too high, the gas wall-hanging stove can be controlled to burn at the minimum load first. If the water outlet temperature of the bathroom water outlet pipe 320 still exceeds the preset temperature, the control module can start the water pump 200 and gradually increase the rotating speed of the water pump 200, so as to further reduce the heat absorbed by the bathroom water in the first heat exchanger 100 per unit time. When the water outlet temperature of the bathroom water outlet pipe 320 meets the preset temperature, the control module controls the rotating speed of the water pump 200 to remain unchanged, so that the water outlet temperature of the bathroom water outlet pipe 320 meets the user's demand. In addition, if the user adjusts the preset temperature to be lower, the control module controls the water pump 200 to increase the rotating speed until the water outlet temperature of the bathroom water outlet pipe 320 meets the preset temperature. At this time, the rotating speed of the water pump 200 remains unchanged. If the user adjusts the preset temperature to be higher, the control module preferentially controls the water pump 200 to reduce the rotating speed, so as to increase the water outlet temperature of the bathroom water outlet pipe 320. For example, when the water pump 200 stops running, the water outlet temperature of the bathroom water outlet pipe 320 still cannot reach the preset temperature. The gas wall-hanging stove can increase the combustion load.

[0043] In one possible implementation, the gas-fired wall-hung boiler also includes a one-way valve (not shown), which is located in the bathroom water circuit. The one-way valve is configured to allow only the bathroom water in the bathroom water circuit to flow from the bathroom inlet pipe 310 to the bathroom outlet pipe 320, ensuring one-way flow of the bathroom water and preventing backflow of the bathroom water from affecting the accuracy of the water temperature detected by the temperature detection module 400.

[0044] In one feasible implementation, the gas-fired wall-hung boiler also includes a flow sensor (not shown), which is located in the bathroom water circuit and is used to detect the flow rate of bathroom water. The flow sensor is electrically connected to the control module and, in conjunction with the water pump 200, can achieve faster and more precise adjustment of the outlet water temperature of the bathroom water outlet pipe 320. For example, when the flow sensor detects a high flow rate of bathroom water in the bathroom water circuit, the speed adjustment of the water pump 200 per unit time can be increased; conversely, when the flow sensor detects a low flow rate of bathroom water in the bathroom water circuit, the speed adjustment of the water pump 200 per unit time can be decreased.

[0045] In some embodiments, the control module includes a main control chip and a frequency converter. The main control chip is configured to adjust the input power frequency of the motor of the water pump 200 through the frequency converter, i.e., frequency conversion speed regulation, which has the advantages of large speed regulation range and high speed regulation accuracy.

[0046] In some embodiments, the control module includes a main control chip and an adjustable resistor. The main control chip is configured to adjust the input current or voltage of the motor of the water pump 200 via the adjustable resistor, i.e., armature speed regulation, which offers high speed regulation accuracy. It is understood that the adjustable resistor can be connected in parallel or series with the water pump 200. Exemplarily, the adjustable resistor's resistance value can be adjusted via a micro motor, which is electrically connected to the main control chip to control the micro motor's resistance adjustment.

[0047] In this embodiment, the control module may include at least one of a frequency converter and an adjustable resistor. Depending on the usage scenario and requirements of the gas wall-hung boiler, the control module may select an appropriate speed regulation method to adjust the water pump speed of 200.

[0048] In one feasible implementation, the water pump 200 can also adjust its speed through mechanical speed regulation. Specifically, the water pump 200 includes a motor (not shown), a gearbox (not shown), and an impeller (not shown). The motor is connected to the impeller through the gearbox. By adjusting the transmission ratio of the gearbox, the water pump 200 adjusts the speed of the impeller driven by the motor, thereby regulating the flow rate and velocity of the bathroom water in the bathroom water circuit and improving the applicability of the gas-fired wall-hung boiler. Of course, the water pump 200 can also adjust its speed in other ways, which are not limited in this embodiment.

[0049] For example, the transmission includes, but is not limited to, variable diameter wheel transmissions or gear transmissions.

[0050] In this embodiment, reference continues to be made to... Figs. 1-3 As shown, the gas-fired wall-hung boiler also includes a proportional valve 500, which is located in the bathroom water circuit. In this embodiment, when the temperature detection module 400 detects that the inlet water temperature of the bathroom inlet pipe 310 is too high, the opening of the proportional valve 500 can be adjusted to the maximum to increase the flow rate and volume of the bathroom water in the bathroom water circuit, thereby further reducing the amount of heat absorbed by the bathroom water in the first heat exchanger 100 per unit time.

[0051] For example, the proportional valve 500 can be an electromagnetic proportional valve or an electric proportional valve. The proportional valve 500 is electrically connected to the control module, and the control module can adjust the opening degree of the proportional valve 500 according to the inlet water temperature.

[0052] For example, when the temperature detection module 400 detects that the inlet water temperature of the bathroom inlet pipe 310 is too high, the gas wall-hung boiler can be controlled to burn at the minimum load, and the opening of the proportional valve 500 can be gradually increased to increase the bathroom water flow rate and the water volume in the bathroom water circuit. When the opening of the proportional valve 500 is adjusted to the maximum, if the outlet water temperature of the bathroom outlet pipe 320 still exceeds the preset temperature, the water pump 200 is started by the control module and the speed of the water pump 200 is gradually increased. When the outlet water temperature of the bathroom outlet pipe 320 meets the preset temperature, the control module controls the water pump 200 to maintain the speed so that the outlet water temperature of the bathroom outlet pipe 320 meets the user's needs.

[0053] It is worth mentioning that the inlet water temperature of the bathroom inlet pipe 310 is low in winter, while the preset outlet water temperature of the bathroom outlet pipe 320 is high. When the temperature detection module 400 detects that the inlet water temperature of the bathroom inlet pipe 310 is too low, after turning on the gas wall-hung boiler, the opening of the proportional valve 500 can be reduced to the minimum to reduce the flow rate of the bathroom water in the bathroom water circuit and increase the water flow rate in the bathroom water circuit, thereby reducing the outlet water flow rate of the bathroom outlet pipe 320. This allows the bathroom water to absorb more heat in the first heat exchanger 100 per unit time and quickly heat to the required temperature. As the combustion load of the gas wall-hung boiler gradually increases, the opening of the proportional valve 500 is controlled to increase synchronously. That is, while ensuring that the outlet water temperature of the bathroom outlet pipe 320 meets the preset temperature, the outlet water flow rate of the bathroom outlet pipe 320 is increased, achieving dual regulation of water and gas. In addition, if the user increases the preset temperature, the combustion load of the gas boiler can be increased first. If the water temperature at the bathroom outlet pipe 320 still does not reach the preset temperature when the combustion load of the gas boiler reaches its maximum, the opening of the proportional valve 500 can be gradually reduced until the water temperature at the bathroom outlet pipe 320 reaches the preset temperature. If the user decreases the preset temperature, the opening of the proportional valve 500 can be increased first. That is, with the combustion load of the gas boiler unchanged, the water temperature at the bathroom outlet pipe 320 can be reduced by increasing the water flow rate. If the water temperature at the bathroom outlet pipe 320 still does not reach the preset temperature when the opening of the proportional valve 500 reaches its maximum, the water temperature at the bathroom outlet pipe 320 can be reduced by decreasing the combustion load of the gas boiler.

[0054] In some embodiments, along the water flow direction, a proportional valve 500 and a water pump 200 are sequentially arranged in the water path between the outlet of the bathroom water heat exchange channel and the outlet of the bathroom water outlet pipe 320. In this embodiment, the proportional valve 500 is located downstream of the water pump 200, which can reduce the impact of the water flow at the outlet of the water pump 200 on the valve core of the proportional valve 500 and extend the service life of the proportional valve 500. Exemplarily, the bathroom water heat exchange channel, the proportional valve 500, the water pump 200, and the bathroom water outlet pipe 320 are sequentially connected, which facilitates assembly and results in a compact structure.

[0055] In other embodiments, the proportional valve 500 and the water pump 200 are sequentially arranged in the water path between the inlet of the bathroom water inlet pipe 310 and the inlet of the bathroom water heat exchange channel, along the water flow direction. In this embodiment, because the water temperature in the water path between the inlet of the bathroom water inlet pipe 310 and the inlet of the bathroom water heat exchange channel is relatively low, the service life of the proportional valve 500 and the water pump 200 can be extended. Exemplarily, the bathroom water inlet pipe 310, the proportional valve 500, the water pump 200, and the bathroom water heat exchange channel are sequentially connected, which facilitates assembly and results in a compact structure.

[0056] Of course, the proportional valve 500 and the water pump 200 can also be installed in other locations in the bathroom water circuit. For example, the bathroom inlet pipe 310, the water pump 200, the proportional valve 500 and the bathroom water heat exchange channel can be connected in sequence; or the bathroom water heat exchange channel, the water pump 200, the proportional valve 500 and the bathroom outlet pipe 320 can be connected in sequence; or the first of the water pump 200 and the proportional valve 500 can be installed between the bathroom water heat exchange channel and the bathroom inlet pipe 310, and the second can be installed between the bathroom water heat exchange channel and the bathroom outlet pipe 320. This embodiment does not limit the scope of the invention.

[0057] In this embodiment, reference continues to be made to... Figs. 1-3 As shown, the first heat exchanger 100 also includes a first heat exchange channel; the gas-fired wall-hung boiler also includes a second heat exchanger 600, a heating outlet pipe 710, a heating return pipe 720, and a water valve assembly 820. The water valve assembly 820 includes a valve 821, and the second heat exchanger 600 includes a second heat exchange channel. The outlet of the first heat exchange channel is connected to the return port of the second heat exchange channel via the heating return pipe 720. The first valve port of valve 821 is connected to the outlet of the second heat exchange channel via the heating outlet pipe 710, and the second valve port of valve 821 is connected to the inlet of the first heat exchange channel. It can be understood that a circulating heating loop can be formed between the first heat exchange channel, the heating return pipe 720, the second heat exchange channel, and the heating outlet pipe 710. In this embodiment, when the gas-fired wall-hung boiler is turned on, the second heat exchanger 600 is continuously heated so that the circulating water in the circulating heating circuit has a high temperature. The bathroom water in the bathroom water heat exchange channel absorbs the heat from the circulating water in the second heat exchange channel to achieve continuous heating of the bathroom water.

[0058] For example, the first heat exchanger 100 may be a plate heat exchanger.

[0059] Specifically, the gas-fired wall-hung boiler includes a burner 610, which ignites the gas to produce high-temperature flue gas that can heat the second heat exchanger 600.

[0060] In one feasible implementation, valve 821 is a three-way valve, with its third port connected to the return port of heater 620. The heating return pipe 720 is also connected to the outlet of heater 620. Heater 620 can be a radiator. It is understood that a circulating heating loop can be formed between the second heat exchange channel, the heating outlet pipe 710, heater 620, and heating return pipe 720. In this embodiment, either the second or third valve port can be connected to the first valve port; that is, when the circulating heating loop is flowing, the circulating heating loop is not flowing; when the circulating heating loop is flowing, the circulating heating loop is not flowing.

[0061] For example, valve 821 can be an electric three-way valve. Valve 821 is electrically connected to the control module, and the control module can conveniently control valve 821 as needed.

[0062] Specifically, the gas-fired wall-hung boiler also includes a circulating water pump (not shown) to control the flow of circulating water in the circulating heating circuit or circulating hot water circuit. For example, the circulating water pump may be located on the heating return pipe 720.

[0063] In one feasible implementation, the gas-fired wall-hung boiler also includes a water circuit adapter 810, which includes an inlet connector 811 and a tee connector 812. The bathroom inlet pipe 310 is connected to the bathroom water heat exchange channel via the inlet connector 811; the first of the three ports of the tee connector 812 is connected to the outlet of the first heat exchange channel, the second is connected to the return port of the second heat exchange channel via the heating return water pipe 720, and the third is connected to the outlet of the heater 620 via the heating return water pipe 720. The structure is compact and easy to assemble. The water circuit adapter 810 can be assembled onto the first heat exchanger 100.

[0064] In some embodiments, the temperature detection module 400 may be disposed on the water adapter 810, and the temperature detection module 400 is used to detect the temperature of the bathroom water in the inlet connector 811. It has a compact structure and is easy to assemble. It is understood that the inlet connector 811 is part of the bathroom water inlet pipe 310.

[0065] In some embodiments, a one-way valve may be located within the inlet connector 811.

[0066] In one feasible implementation, the water valve assembly 820 further includes a water outlet connector 822. The bathroom water outlet pipe 320 is connected to the bathroom water heat exchange channel via the water outlet connector 822, resulting in a compact structure and easy assembly.

[0067] For example, such as Fig. 2 As shown, the bathroom water heat exchange channel, water outlet connector 822, proportional valve 500, water pump 200 and bathroom water outlet pipe 320 are connected in sequence for easy assembly.

[0068] In the specific implementation of the above embodiments, the technical features can be combined in any non-contradictory way. For the sake of brevity, not all possible combinations of the above technical features are described. However, as long as the combination of these technical features is not contradictory, it should be considered to be within the scope of this specification.

[0069] The specific embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A gas-fired wall-hung boiler, characterized in that, The device includes a first heat exchanger (100), a water pump (200) with adjustable speed, a bathroom inlet pipe (310), a bathroom outlet pipe (320), a temperature detection module (400), and a control module. The temperature detection module (400) is located on the bathroom inlet pipe (310) and is used to detect the inlet water temperature. The first heat exchanger (100) includes a bathroom water heat exchange channel, which is connected to the bathroom inlet pipe (310) and the bathroom outlet pipe (320) to form a bathroom water circuit. The water pump (200) is located on the bathroom water circuit. The control module is electrically connected to the temperature detection module (400) and the water pump (200), and the control module is configured to adjust the speed of the water pump (200) according to the inlet water temperature to adjust the outlet water temperature of the bathroom outlet pipe (320).

2. The gas-fired wall-hung boiler according to claim 1, characterized in that, The control module includes a main control chip and a frequency converter. The main control chip is configured to adjust the input power frequency of the motor of the water pump (200) through the frequency converter; or, the control module includes a main control chip and an adjustable resistor. The main control chip is configured to adjust the input current or voltage of the motor of the water pump (200) through the adjustable resistor.

3. The gas-fired wall-hung boiler according to claim 1, characterized in that, The water pump (200) includes a motor, a gearbox, and an impeller, with the motor connected to the impeller via the gearbox.

4. The gas-fired wall-hung boiler according to claim 1, characterized in that, It also includes a proportional valve (500), which is located on the bathroom water circuit.

5. The gas-fired wall-hung boiler according to claim 4, characterized in that, Along the water flow direction, the proportional valve (500) and the water pump (200) are sequentially arranged on the water path between the inlet of the bathroom water inlet pipe (310) and the inlet of the bathroom water heat exchange channel; or, along the water flow direction, the proportional valve (500) and the water pump (200) are sequentially arranged on the water path between the outlet of the bathroom water heat exchange channel and the outlet of the bathroom water outlet pipe (320).

6. The gas-fired wall-hung boiler according to claim 1, characterized in that, Also includes: A one-way valve is provided on the bathroom water circuit, and the one-way valve is configured to allow only the bathroom water in the bathroom water circuit to flow from the bathroom inlet pipe (310) to the bathroom outlet pipe (320); And / or, a flow sensor is installed on the bathroom water line.

7. The gas-fired wall-hung boiler according to any one of claims 1-6, characterized in that, The first heat exchanger (100) further includes a first heat exchange channel; The gas-fired wall-hung boiler also includes a second heat exchanger (600), a heating outlet pipe (710), a heating return pipe (720), and a water valve assembly (820), wherein the water valve assembly (820) includes a valve (821); the second heat exchanger (600) includes a second heat exchange channel; The outlet of the first heat exchange channel is connected to the return outlet of the second heat exchange channel through the heating return water pipe (720), the first valve port of the valve (821) is connected to the outlet of the second heat exchange channel through the heating outlet water pipe (710), and the second valve port of the valve (821) is connected to the inlet of the first heat exchange channel.

8. The gas-fired wall-hung boiler according to claim 7, characterized in that, The valve (821) is a three-way valve. The third valve port of the valve (821) is used to connect with the return water port of the heater (620). The heating return water pipe (720) is also used to connect with the outlet of the heater (620).

9. The gas-fired wall-hung boiler according to claim 7, characterized in that, The water valve assembly (820) also includes a water outlet connector (822); The bathroom water outlet pipe (320) is connected to the bathroom water heat exchange channel through the water outlet connector (822).

10. The gas-fired wall-hung boiler according to claim 7, characterized in that, It also includes a water circuit adapter (810), which includes a water inlet connector (811) and a tee connector (812); The bathroom water inlet pipe (310) is connected to the bathroom water heat exchange channel through the water inlet connector (811); The first of the three ports of the three-way connector (812) is connected to the outlet of the first heat exchange channel, the second is connected to the return port of the second heat exchange channel through the heating return water pipe (720), and the third is connected to the outlet of the heater (620) through the heating return water pipe (720).

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