Anti-freezing water heater

Abstract

The utility model relates to the technical field of water heaters, in particular to an anti-freezing water heater which comprises a shell, a heat exchanger is arranged in the shell, a water inlet pipe and a water outlet pipe are communicated on the heat exchanger, the water inlet pipe extends to the outer side of the shell, a ventilation pipeline is arranged on the water inlet pipe, and a water outlet pipe is arranged on the ventilation pipeline. An air inlet pipeline is detachably connected to the ventilation pipeline, the water heater further comprises an external fan, an air outlet of the external fan directly faces the air inlet pipeline, after the water heater is used, air is supplied to the air inlet pipeline through the external fan, the problems of water accumulation and freezing in the pipeline can be solved, the internal space of the water heater is not occupied, and the water heater is convenient to use. The occupied space of the water heater can be reduced, the fan is easy to replace, and the maintenance cost is low.

Description

TECHNICAL FIELD

[0001] The utility model relates to water heater technical field especially is a kind of anti-freezing water heater. BACKGROUND

[0002] Gas water heater is a kind of gas appliance by heating mode to heat to transfer heat to the cold water flowing through heat exchanger to achieve the purpose of preparing hot water, after use, its internal pipeline will have residual water, in the case of low temperature in winter, residual water is easy to freeze and cause pipe freeze crack. To prevent this from happening, anti-freezing device is generally provided on water heater.

[0003] For example, the patent document with publication number CN208871832U discloses a kind of gas water heater with anti-freezing function, including water heater shell, heat exchanger, anti-freezing sensor, controller and fan. Heat exchanger, anti-freezing sensor and fan are all arranged inside water heater shell. Anti-freezing sensor is used to sense the first temperature of straight pipe on which heat exchange fin is installed and / or elbow pipe directly connected with straight pipe. Controller is electrically connected with fan and anti-freezing sensor respectively. Controller is used to control fan to start working when detecting that the first temperature is lower than first preset temperature, and to control fan to stop working when detecting that the first temperature is higher than first preset temperature, controller controls fan to start working, fan introduces warm air in indoor environment into heat exchanger in water heater shell, warm air in indoor environment heats water in heat exchanger pipe, and is discharged outdoor through exhaust pipe of gas water heater, while discharging wind to outdoor, cold air in outdoor can be blocked from pouring into heat exchanger through exhaust pipe, which can prevent residual water in heat exchanger pipe from freezing.

[0004] The above-mentioned technology has the following problems: the fan of the above-mentioned water heater is arranged in the shell, so its volume is large, and it occupies more space, and when the fan is short-circuited and fails, professional personnel needs to replace it, which is high in cost.

[0005] Therefore, an anti-freezing water heater is proposed to solve the above-mentioned technical problems. UTILITY MODEL CONTENTS

[0006] To solve the above-mentioned technical problems, the purpose of the utility model is to provide an anti-freezing water heater, which is simple in structure and low in maintenance cost.

[0007] The utility model discloses the technical scheme adopted to solve the problem is as follows: an anti-freezing water heater, comprising a shell, a heat exchanger is arranged in the shell, a water inlet pipe and a water outlet pipe are communicated with the heat exchanger, the water inlet pipe extends to the outside of the shell, an air duct is arranged on the water inlet pipe, an air inlet pipe is detachably connected to the air duct, and an external fan is further included, and the air outlet of the external fan is opposite to the air inlet pipe.

[0008] As a further improvement of the above technical solution, the shape of the air inlet pipe is funnel-shaped.

[0009] As a further improvement of the above technical solution, the inner side of the air vent pipe is provided with an internal thread, and the air inlet pipe is provided with an external thread and is screwed to the air vent pipe.

[0010] As a further improvement of the above technical solution, the angle between the air vent pipe and the water inlet pipe is 90°.

[0011] As a further improvement of the above technical solution, it further comprises a plug which is detachably connected to the air vent pipe.

[0012] As a further improvement of the above technical solution, the water inlet pipe is communicated with a pressure relief pipe, and the pressure relief pipe is provided with a pressure relief valve.

[0013] As a further improvement of the above technical solution, the angle between the pressure relief pipe and the water inlet pipe is less than 90°.

[0014] The beneficial effects of the present utility model are as follows: after the water heater is used, the external fan sends air to the air inlet pipe, which can prevent water accumulation and icing in the pipe, does not occupy the internal space of the water heater, can reduce the occupied space of the water heater, and the fan is easy to replace, and the maintenance cost is low. BRIEF DESCRIPTION OF DRAWINGS

[0015] The present utility model will be further explained and described in combination with the accompanying drawings and specific embodiments.

[0016] Figure 1 is a structural diagram of the present utility model;

[0017] Figure 2 is a side view of the present utility model;

[0018] Figure 3 is a sectional view of A-A part of the present utility model;

[0019] Figure 4 is Figure 3 a local enlarged view of A part.

[0020] In the figure: 1 - shell, 2 - heat exchanger, 21 - water inlet pipe, 22 - water outlet pipe, 23 - air vent pipe, 24 - air inlet pipe, 3 - pressure relief pipe, 4 - pressure relief valve. DETAILED DESCRIPTION

[0021] The detailed description of the utility model will be described in detail in this part, the preferred embodiment of the utility model is shown in the drawings, the role of the drawings is to supplement the description of the written part with graphics, so that people can intuitively and visually understand each technical feature and the overall technical scheme of the utility model, but it cannot be understood as a limitation on the protection scope of the utility model.

[0022] In the description of the utility model, it should be understood that the orientation description, such as up, down, front, back, left, right and the like, is based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, and cannot be understood as indicating or implying that the indicated device or element must have a specific orientation, a specific orientation and operation, therefore, it cannot be understood as a limitation on the utility model.

[0023] In the description of the utility model, the meaning of several is one or more, the meaning of multiple is more than two, greater than, less than, more than and the like are not included in the number, above, below and the like are included in the number.If the first, the second is described for the purpose of distinguishing technical features, it cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or implicitly indicating the sequence of indicated technical features.

[0024] In the description of the utility model, unless otherwise explicitly limited, the words such as setting, installation, connection and the like should be understood in a broad sense, and the skilled in the art can reasonably determine the specific meaning of the above words in the utility model according to the specific content of the technical scheme.

[0025] Referring to Figures 1 to 4 A kind of anti-freezing water heater, including shell 1, heat exchanger 2 is provided in shell 1, water inlet pipe 21 and water outlet pipe 22 are communicated on heat exchanger 2, water inlet pipe 21 extends to the outside of shell 1, air passage 23 is provided on water inlet pipe 21, air inlet pipe 24 is detachably connected on air passage 23, further including external fan, the air outlet of external fan is directly opposite air inlet pipe 24;

[0026] After water heater is used, air is sent to air inlet pipe 24 by external fan, indoor warm air can be sent into pipe, can prevent the problem of water accumulation and ice formation in pipe, does not occupy the internal space of water heater, can reduce the occupied space of water heater, and fan is easily replaced, maintenance cost is lower.

[0027] In preferred embodiment, in order to increase the air inlet area, the shape of air inlet pipe 24 is funnel-shaped.

[0028] In preferred embodiment, in order to facilitate the installation of air inlet pipe 24, the inner side of air passage 23 is provided with internal thread, air inlet pipe 24 is provided with external thread, and air inlet pipe 24 is screwed to air passage 23.

[0029] In the preferred embodiment, the angle between the air pipe 23 and the water inlet pipe 21 is 90°.

[0030] In the preferred embodiment, a plug is detachably connected to the air pipe 23. When the water heater does not need to use the anti-freezing function, the air pipe 24 can be detached from the air pipe 23, and the plug is installed on the air pipe 23 to prevent water from flowing out of the air pipe 23 when the water heater is in use.

[0031] In the preferred embodiment, a pressure relief pipe 3 is connected to the water inlet pipe 21, and a pressure relief valve 4 is arranged on the pressure relief pipe 3. When the water inlet pipe 21 is frozen due to residual water, the water flow cannot pass through the water inlet pipe 21 normally, causing the water pressure inside the water inlet pipe 21 to be too high. The water flow at the water inlet pipe 21 can be discharged outward through the pressure relief valve 4, thereby reducing the water pressure inside the water inlet pipe 21 and preventing the pipe from being broken due to the high water pressure.

[0032] In the preferred embodiment, the angle between the pressure relief pipe 3 and the water inlet pipe 21 is less than 90°.

[0033] The above is only the preferred embodiment of the present application, and does not limit the patent scope of the present application. Any equivalent structural transformation, direct or indirect application in other related technical fields, or any other equivalent transformation within the scope of the present application, as described in the present application, are included in the patent protection scope of the present application.

Claims

1. An anti-freezing water heater, characterized in that: comprising a shell (1), a heat exchanger (2) is arranged in the shell (1), a water inlet pipe (21) and a water outlet pipe (22) are communicated on the heat exchanger (2), the water inlet pipe (21) extends to the outside of the shell (1), an air passage (23) is arranged on the water inlet pipe (21), an air inlet pipe (24) is detachably connected on the air passage (23), an external fan is further arranged, and an air outlet of the external fan is opposite to the air inlet pipe (24).

2. The anti-freezing water heater according to claim 1, characterized in that: the air inlet pipe (24) is funnel-shaped.

3. The anti-freezing water heater according to claim 2, characterized in that: an inner thread is arranged on the inner side of the air passage (23), an outer thread is arranged on the air inlet pipe (24), and the air inlet pipe (24) is screwed on the air passage (23).

4. The anti-freezing water heater according to claim 1, characterized in that: the air passage (23) and the water inlet pipe (21) are at an angle of 90°.

5. The anti-freezing water heater according to claim 1, characterized in that: a plug is further arranged, and the plug is detachably connected on the air passage (23).

6. The anti-freezing water heater according to claim 1, characterized in that: a pressure relief pipe (3) is communicated at the water inlet pipe (21), and a pressure relief valve (4) is arranged on the pressure relief pipe (3).

7. The anti-freezing water heater according to claim 6, characterized in that: the pressure relief pipe (3) and the water inlet pipe (21) are at an angle less than 90°. ​ ​ ​ ​ ​ ​ ​

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