Outdoor water heater with preheating function

Abstract

The utility model discloses an outdoor water heater with a preheating function. The outdoor water heater comprises a water heater shell. The heat exchange assembly comprises a heating piece and a heat exchange pipe; the pipeline assembly comprises a water pump, a first valve body, a second valve body, a water inlet pipe, a water outlet pipe and a water return pipe, and the first valve body is provided with a first connector, a second connector and a third connector; the second valve body is provided with a fourth connector, a fifth connector and a sixth connector. The first connector is communicated with the water inlet, the second connector is communicated with the water return port, the third connector is communicated with one end of the water inlet pipe, the other end of the water inlet pipe is communicated with the water inlet end of the heat exchange pipe, the water outlet end of the heat exchange pipe is communicated with the fourth connector, and the fifth connector is communicated with the water outlet. One end of the water return pipe is communicated with the water return port, and the other end of the water return pipe is communicated with the water inlet pipe; and a detection assembly. According to the utility model, cold water can be preheated, then heated and led out, and the cold water quantity of the water outlet is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to water heater technical field especially relates to a preheating function's outdoor water heater. BACKGROUND

[0002] The existing outdoor water heater is mainly used for motor home or camping site etc., and due to the limitation of outdoor conditions, power supply is usually insufficient, so the commonly used water heater is gas water heater, and the combustion chamber of the gas water heater is used to guide the combustion of gas, and the combustion heat exchanges heat with the coil pipe arranged outside the combustion chamber.

[0003] When used outdoors, the water temperature of the water heater is affected by the outdoor temperature, especially in the case of very low outdoor temperature, the pipe may freeze, affecting the normal use of the water heater. In addition, when the water heater heats water, if the water temperature is low, the heating time will be longer, so the outlet position will guide more cold water to have hot water, resulting in waste of water resources, and the user cannot use hot water quickly, and the user experience is poor. SUMMARY

[0004] In order to overcome at least one of the defects of the prior art, the utility model provides an outdoor water heater with preheating function, when the outdoor temperature is low, the first detector detects that the water inlet temperature is low, the water pump is started to make the hot water of the heat exchange pipe circulate in the water inlet pipe, so that the cold water can be preheated before heating and guiding out, reducing the amount of cold water at the water outlet.

[0005] The utility model adopts the technical scheme that:

[0006] An outdoor water heater with preheating function, comprising a water heater shell, a water inlet, a water outlet and a water return on the water heater shell;

[0007] A heat exchange assembly comprising a heating element and a heat exchange pipe for heat exchange with the heating element;

[0008] A pipe assembly comprising a water pump, a first valve body, a second valve body, a water inlet pipe, a water outlet pipe and a water return pipe, the first valve body is provided with a first interface, a second interface and a third interface; The second valve body is provided with a fourth interface, a fifth interface and a sixth interface; The first interface is in communication with the water inlet, the second interface is in communication with the water return, and the third interface is in communication with one end of the water inlet pipe; The other end of the water inlet pipe is in communication with the water inlet end of the heat exchange pipe, the water outlet end of the heat exchange pipe is in communication with the fourth interface, and the fifth interface is in communication with the water outlet; The sixth interface is in communication with the water return, one end of the water return pipe is in communication with the water return, and the other end of the water return pipe is in communication with the water inlet pipe;

[0009] A detection assembly comprises a first detector for detecting the temperature of the water inlet and sending a first detection signal; the heating element, the water pump, the first valve body and the second valve body are configured to receive the first detection signal.

[0010] Further, the detection assembly further comprises a second detector installed on the water heater housing, the second detector is configured to detect the ambient temperature and send a second detection signal; the water pump, the first valve body and the second valve body are configured to receive the second detection signal.

[0011] Further, a filter pipe is arranged between the water inlet pipe and the water inlet end of the heat exchange pipe, and a filter valve is arranged on the filter pipe.

[0012] Further, the water outlet end of the heat exchange pipe is provided with a first guide pipe, a second guide pipe and a heat preservation bin, one end of the guide pipe is communicated with the water outlet end of the heat exchange pipe, the other end of the guide pipe is communicated with the inlet of the heat preservation bin, the outlet of the heat preservation bin is communicated with one end of the second guide pipe, and the other end of the second guide pipe is communicated with the fourth interface.

[0013] Further, the first guide pipe is further provided with a pressure relief valve.

[0014] Further, a one-way valve is arranged on the water return pipe.

[0015] Further, the heating element comprises a burner, the burner is provided with a combustion chamber, the combustion chamber is configured to guide the combustion of fuel gas, and the heat exchange pipe is configured to exchange heat with the combustion heat of the combustion chamber; the burner is configured to start according to the first detection signal.

[0016] Further, the heat exchange pipe is arranged around the burner.

[0017] Further, the top end of the burner is further provided with an exhaust assembly, the exhaust assembly comprises an exhaust hood and an exhaust fan, the air inlet end of the exhaust hood is communicated with the upper portion of the combustion chamber, and the air outlet end of the exhaust hood is communicated with the outside.

[0018] Further, the detection assembly further comprises a third detector for detecting the temperature of the water outlet end of the heat exchange pipe.

[0019] In summary, the utility model has the following technical effects:

[0020] When the first detector detects that the water inlet temperature is low, the water pump and the heating element can be started according to the first detection signal of the first detector, the water pump is opened to provide power, cold water is introduced into the water inlet pipe, and then introduced into the fourth interface of the second valve body through the water outlet end of the heat exchange pipe, and then introduced into the water return pipe through the sixth interface of the second valve body, so that the water in the water return pipe is preheated water after one heat exchange cycle, and the preheated water is introduced into the water inlet pipe again, that is, at this time, the cold water in the water inlet pipe is mixed and then introduced into the water inlet pipe again, and then introduced into the heat exchange pipe for secondary heat exchange, so that the internal preheating cycle is carried out, and the frozen pipe is prevented. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is a structure schematic view of the utility model;

[0022] Figure 2 It is another angle structure schematic view of the utility model;

[0023] Figure 3 It is a structure schematic view of the pipeline assembly of the utility model.

[0024] Among them, the meaning of the reference signs is as follows: 10, water heater shell; 11, water inlet; 12, water outlet; 13, water return port; 21, water inlet pipe; 22, water return pipe; 23, first conduction pipeline; 24, second conduction pipeline; 25, heat preservation bin; 31, burner; 32, heat exchange pipe; 33, combustion assembly; 41, exhaust fan; 42, exhaust hood; 51, first detector; 52, second detector; 53, third detector; 54, controller. DETAILED DESCRIPTION

[0025] In order to better understand and implement, the technical scheme in the embodiment of the utility model will be clearly and completely described below in combination with the drawings in the embodiment of the utility model.

[0026] In the description of the utility model, it should be explained that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, therefore it cannot be understood as a limitation of the utility model.

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description herein is for describing particular embodiments only and is not intended to be limiting of the application.

[0028] Referring to Figure 1 , Figure 2 and Figure 3 , the utility model discloses an outdoor water heater of preheating function, including water heater casing 10, heat exchange subassembly, pipeline subassembly and detection subassembly, can be on water heater casing 10 water inlet 11, water outlet 12 and backwater mouth 13, above-mentioned heat exchange subassembly includes heating element and heat exchange pipe 32, and heat exchange pipe 32 can exchange heat with heating element.

[0029] Pipeline subassembly includes water pump, first valve body, second valve body, water inlet pipe 21, water outlet pipe and backwater pipe 22, and first valve body is equipped with first interface, second interface and third interface, and second valve body is equipped with fourth interface, fifth interface and sixth interface. When carrying out the connection of pipeline subassembly, can make first valve body's first interface with water inlet 11 conduction, second interface with backwater mouth 13 conduction, and make third interface with water inlet pipe 21 one end conduction water inlet pipe 21 other end with heat exchange pipe 32 water inlet end conduction, in addition heat exchange pipe 32 water outlet end with fourth interface conduction, fifth interface with water outlet 12 conduction. Sixth interface with backwater mouth 13 conduction, backwater pipe 22 one end with backwater mouth 13 conduction, backwater pipe 22 other end with water inlet pipe 21 conduction;

[0030] In addition, detection subassembly includes first detector 51, and first detector 51 is used for the water temperature of water inlet 11, and sends first detection signal, and heating element, water pump, first valve body and second valve body are used for receiving first detection signal.

[0031] On the basis of above-mentioned structure, when using the outdoor water heater of preheating function of the utility model, specifically make water inlet 11 with water supply pipe, when applying to the house car, water inlet 11 of water heater casing 10 with the water supply pipe on the house car conduction.

[0032] Water heater casing 10 is provided with controller 54, to preset low temperature water temperature value in controller 54, first kind of use state (referring to the flow direction of dashed arrow and solid arrow in Figure 3 ) is: when the water temperature is lower than the low temperature water temperature value, it indicates that the outdoor water temperature is low, and needs to carry out cold water preheating treatment, and the second kind of use state (referring to the flow direction of solid arrow in Figure 3 ) is: when the water temperature is higher than the preset low temperature water temperature value, the outdoor water temperature is normal water temperature, and can be normally heated.

[0033] In the first use state, the first detector 51 at the position of the water inlet 11 can detect the water temperature of the water inlet 11, and the first detection signal detects a water temperature lower than the low-temperature water temperature value of the controller 54. At this time, the first valve body opens the first interface, the second interface, and the third interface according to the first detection signal, and simultaneously, the second valve body opens the fourth interface and the sixth interface according to the first detection signal, and the fifth interface can be closed.

[0034] In this case, the water pump is opened to provide power, cold water is introduced into the water inlet pipe 21, and then introduced into the water inlet end of the heat exchange pipe 32. The water in the heat exchange pipe 32 exchanges heat with the heating element, and then is introduced into the fourth interface of the second valve body through the water outlet end of the heat exchange pipe 32. The water in the water return pipe 22 is preheated water after one heat exchange cycle, and the preheated water is introduced into the water inlet pipe 21 again. That is, at this time, the cold water in the water inlet pipe 21 is mixed with the cold water in the water inlet pipe 21 and then introduced into the water inlet pipe 21 again, and then guided to the heat exchange pipe 32 for secondary heat exchange. In this way, the internal preheating cycle is performed to prevent the occurrence of a frozen water pipe.

[0035] At the same time, when the water temperature entering the water inlet 11 is higher than the low-temperature water temperature value preset by the controller 54, the preheating cycle can be stopped. When the user needs to use hot water, the water flowing in the water pipe in the water heater is preheated water after circulation. The second valve body is opened, and the sixth interface of the second valve body is closed at the same time. At this time, the water heater is opened in the second use state, that is, the water flow exchanged by the water outlet end of the heat exchange pipe 32 can enter the fifth interface of the second valve body, and then be guided out through the water outlet 12. The water outlet 12 is used to the hot water equipment, such as a shower, a hot water faucet, etc. In this way, the hot water is guided out at a relatively fast speed, and the user can quickly use the hot water without waiting for a large amount of cold water to be guided out, thereby reducing water waste and improving user experience.

[0036] Of course, in the case that the outdoor temperature is relatively high, the first detector 51 at the position of the water inlet 11 detects that the water temperature is higher than the low-temperature water temperature value preset by the controller 54, and no preheating action is needed. At this time, the water heater directly operates in the second use state, the sixth interface of the second valve body is closed, and the fifth interface of the second valve body is opened at the same time, that is, the water flow exchanged by the water outlet end of the heat exchange pipe 32 can enter the fifth interface of the second valve body, and then be guided out through the water outlet 12. The water outlet 12 is used to the hot water equipment.

[0037] Further, the detection assembly in the embodiment further includes a second detector 52, which is installed on the water heater shell 10. The second detector 52 is used to detect the ambient temperature and send a second detection signal. The water pump, the first valve body, and the second valve body are used to receive the second detection signal.

[0038] On the basis of the structure, the preset temperature of the controller 54 can include a low water temperature value and an ambient temperature value, that is, when the first detector 51 at the water inlet 11 detects that the water temperature value is lower than the preset low water temperature value or the second detector 52 detects that the outdoor ambient temperature is lower than the preset ambient temperature value, the water heater can be started in the first use state for operation, and the water in the water heater is preheated and circulated to improve the hot water use speed, and the frozen water pipe situation can be prevented, and the abnormal use of the water heater can be prevented.

[0039] Further, the water inlet pipe 21 and the water inlet end of the heat exchange pipe 32 in the embodiment are provided with a filter pipe, and a filter valve is arranged on the filter pipe. The filter valve can be a filter valve in the prior art, and a filter screen or filter activated carbon is arranged in the filter valve. The filter valve is used for filtering the water in the water inlet pipe 21 to improve the water quality.

[0040] Further, the first guide pipe 23, the second guide pipe 24 and the heat preservation bin 25 are arranged at the water outlet end of the heat exchange pipe 32. One end of the guide pipe is in communication with the water outlet end of the heat exchange pipe 32, the other end of the guide pipe is in communication with the inlet of the heat preservation bin 25, the outlet of the heat preservation bin 25 is in communication with one end of the second guide pipe 24, and the other end of the second guide pipe 24 is in communication with the fourth interface. On the basis of the structure, the hot water after heat exchange of the heat exchange pipe 32 can be guided into the first guide pipe 23 through the water outlet end of the heat exchange pipe 32, guided into the heat preservation bin 25 through the first guide pipe 23, and temporarily stored in the heat preservation bin 25. The heat preservation bin 25 can moderate the water flow and stabilize the water temperature. The hot water in the heat preservation bin 25 is guided into the fourth interface through the second guide pipe 24, and then guided into the fifth interface or the sixth interface.

[0041] Further, the first guide pipe 23 is further provided with a pressure relief valve. The pressure relief valve can relieve the water flow in the first guide pipe 23 into the heat preservation bin 25, so that the water flow can be normally guided into the heat preservation bin 25, and the stable water flow speed can be realized.

[0042] Further, the water return pipe 22 is provided with a one-way valve. The one-way valve only allows the water in the water return pipe 22 to be guided into the water inlet pipe 21 in one direction, and does not allow the water in the water inlet pipe 21 to flow back to the water return pipe 22, so that the water can be guided in one direction.

[0043] Further, the heating element in the embodiment includes a burner 31. A combustion chamber is arranged in the burner 31. A combustion assembly 33 in the prior art can be arranged at the bottom end of the combustion chamber. After the combustion chamber is guided into the gas, the combustion assembly 33 is used for combustion, and the combustion heat generated by the combustion assembly 33 can be used for heat exchange with the heat exchange pipe 32, so that the cold water in the heat exchange pipe 32 can be heated.

[0044] Of course, when the cold water preheating cycle is carried out, the burner 31 can be started according to the first detection signal to realize the automatic preheating cycle.

[0045] It should be noted that the combustion assembly 33 in the embodiment can specifically include a gas distribution rod mechanism, a combustion head and a plurality of gas nozzles in the prior art, and the gas distribution rod mechanism includes a main gas pipe and a plurality of branch gas pipes. In addition, the combustion head and the plurality of gas nozzles are arranged on the branch gas pipes, the plurality of gas nozzles are in communication with the branch gas pipes, and the plurality of gas nozzles guide the gas to be sprayed to the combustion head. When combustion is carried out, the gas pipe is in communication with the main gas pipe, and after the gas enters the main gas pipe, the gas is uniformly distributed by the branch gas pipe to ensure that the gas can be uniformly distributed to each combustion position of the burner 31. In this way, it can be ensured that the flame is uniformly burned on the entire burner 31, and the situation of local flame being too strong or too weak is avoided.

[0046] The gas is transported to the gas nozzle through the branch gas pipe and is sprayed out under a certain pressure, mixed with the air entering through the air inlet, so that the gas and the air are quickly mixed, and then ignited by the ignition device at the combustion head to burn, and the combustion efficiency is higher.

[0047] Further, the heat exchange pipe 32 is arranged around the burner 31, and when the burner 31 is burning, the heat exchange area with the combustion heat can be increased because the heat exchange pipe 32 is arranged around the burner 31, so that the heating efficiency is higher.

[0048] Of course, on the basis of not using the burner 31 as a heating element, the heating element of the above-mentioned heat exchange assembly can also be selected as an electric heating structure, such as a heating resistor, or a heating coil structure.

[0049] Further, the top end of the burner 31 is also provided with a smoke exhaust assembly, and the smoke exhaust assembly includes a smoke exhaust hood 42 and a smoke exhaust fan 41. The air inlet end of the smoke exhaust hood 42 is communicated to the upper side of the combustion chamber, and the air outlet end of the smoke exhaust hood 42 is communicated to the outside. Because a large amount of combustion waste gas will be generated when the burner 31 is used, the waste gas in the combustion chamber needs to be discharged in time. In this way, the air inlet end of the smoke exhaust hood 42 can be communicated to the upper side of the combustion chamber, and the air outlet end of the smoke exhaust hood 42 can be communicated to the outside. In this way, when the burner 31 is used, the combustion waste gas generated by the burner 31 can be guided out of the smoke exhaust hood 42 under the action of the smoke exhaust fan 41 to realize smoke exhaust. The smoke exhaust hood 42 can form a stable flow field for the combustion waste gas to flow, thereby reducing the noise of smoke exhaust.

[0050] Further, the detection assembly further includes a third detector 53 for detecting the outlet water temperature of the outlet end of the heat exchange pipe 32. When the third detector 53 detects that the outlet water temperature of the heat exchange pipe 32 reaches the preset water temperature of the controller 54, the burner 31 can stop operating according to the temperature to prevent overheating of the water temperature.

[0051] The technical means disclosed in the utility model scheme are not limited to the technical means disclosed in the above-mentioned embodiments, and also include technical schemes composed of any combination of the above technical features. It should be pointed out that, for ordinary skilled persons in the technical field, under the premise of not departing from the principle of the utility model, a number of improvements and refinements can be made, and these improvements and refinements are also considered to be within the protection scope of the utility model.

Claims

1. An outdoor water heater with preheating function, characterized in that: The utility model relates to a water heater, including, The water heater shell, water inlet, water outlet and backwater port are arranged on the water heater shell; The heat exchange assembly includes a heating element and a heat exchange pipe for heat exchange with the heating element; The pipeline assembly includes a water pump, a first valve body, a second valve body, a water inlet pipe, a water outlet pipe and a backwater pipe, the first valve body is provided with a first interface, a second interface and a third interface, the second valve body is provided with a fourth interface, a fifth interface and a sixth interface, the first interface is communicated with the water inlet, the second interface is communicated with the backwater port, one end of the water inlet pipe is communicated with the third interface, the other end of the water inlet pipe is communicated with the water inlet end of the heat exchange pipe, the water outlet end of the heat exchange pipe is communicated with the fourth interface, the fifth interface is communicated with the water outlet, the sixth interface is communicated with the backwater port, one end of the backwater pipe is communicated with the backwater port, and the other end of the backwater pipe is communicated with the water inlet pipe; The detection assembly includes a first detector for detecting the water inlet temperature of the water inlet and sending a first detection signal, and the heating element, the water pump, the first valve body and the second valve body are used for receiving the first detection signal.

2. An outdoor water heater of the preheat function according to claim 1, characterized in that, The detection assembly further includes a second detector mounted on the water heater shell, the second detector is used for detecting the ambient temperature and sending a second detection signal, and the water pump, the first valve body and the second valve body are used for receiving the second detection signal.

3. An outdoor water heater of the preheat function according to claim 1, characterized in that, A filter pipe is arranged between the water inlet pipe and the water inlet end of the heat exchange pipe, and a filter valve is arranged on the filter pipe.

4. An outdoor water heater of the preheat function according to claim 1, characterized in that, The water outlet end of the heat exchange pipe is provided with a first communication pipe, a second communication pipe and a heat preservation bin, one end of the communication pipe is communicated with the water outlet end of the heat exchange pipe, the other end of the communication pipe is communicated with the inlet of the heat preservation bin, the outlet of the heat preservation bin is communicated with one end of the second communication pipe, and the other end of the second communication pipe is communicated with the fourth interface.

5. An outdoor water heater of the preheat function according to claim 4, characterized in that, The first communication pipe is further provided with a pressure relief valve.

6. An outdoor water heater of the preheat function according to claim 1, characterized in that, A one-way valve is arranged on the backwater pipe.

7. An outdoor water heater of the preheat function as claimed in any one of claims 1 to 6, characterized in that, The heating element includes a burner provided with a combustion chamber for introducing fuel gas for combustion, and the heat exchange pipe is used for heat exchange with the combustion heat of the combustion chamber, and the burner is used for starting according to the first detection signal.

8. An outdoor water heater of the preheat function according to claim 7, characterized in that, The heat exchange pipe is arranged around the burner.

9. An outdoor water heater of the preheat function according to claim 7, characterized in that, The top end of the burner is further provided with a smoke exhaust assembly including a smoke exhaust hood and a smoke exhaust fan, the air inlet end of the smoke exhaust hood is communicated with the upper portion of the combustion chamber, and the air outlet end of the smoke exhaust hood is communicated with the outside.

10. An outdoor water heater of the preheat function as claimed in any one of claims 1 to 6, wherein The detection assembly further includes a third detector for detecting the water outlet temperature of the water outlet end of the heat exchange pipe.

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