Balancing outlet water temperature structure for water heater

Abstract

The utility model relates to the field of water heater, concretely is a kind of water heater balance outlet water temperature structure. It includes heat exchanger and connecting pipe;Heat exchanger has pipe one and pipe two, and pipe one both ends are pipe one input end and pipe one output end respectively, and pipe two both ends are pipe two input end and pipe two output end respectively;Connecting pipe both ends are communicated with pipe one output end and pipe two input end respectively.The utility model structure is simple, low in cost, can be retrofitted on existing gas water heater to realize the balance of outlet water temperature.

Description

Technical Field

[0001] This utility model relates to the field of water heaters, and in particular to a structure for balancing the outlet water temperature of a water heater. Background Technology

[0002] Currently, if a gas water heater is briefly turned off and then turned back on during use, the water temperature may fluctuate significantly, specifically in two ways: 1. A short section of excessively hot water may occur: When the water is normally at a warm temperature, the gas valve of the gas water heater is open, and the flame continuously heats the heat exchanger (commonly known as the "firebox"). When the tap is turned off, the water flow stops, and the gas water heater immediately stops heating (extinguishes the flame). However, the enormous heat generated by combustion does not disappear instantly, and the heating copper pipe remains at a high temperature. At this time, a small amount of water is trapped in the scorching heating copper pipe. Since no new cold water comes in to push and cool it, this stagnant water will be continuously heated by the residual heat of the copper pipe, far exceeding the previously set temperature, and may even reach a near-boiling point. If the interval between turning the tap on and off is short, when the tap is turned on again, this excessively hot water heated by the residual heat will flow out from the showerhead, creating a section of particularly scalding water. 2. Short bursts of cold water: After the tap is turned off, the gas water heater immediately shuts off and stops heating. When the tap is turned on again, the water has already started flowing, but the gas water heater needs a little time to retest, ignite, and burn in order to meet the national standard requirement of "ventilation before ignition" to prevent deflagration and ensure effective exhaust of exhaust gases. Therefore, the actual ignition time lags behind the tap opening time. If the interval between turning the water on and off is not long enough for the original warm water in the entire outlet pipe to cool completely, then there will inevitably be a few seconds of cold water after this warm water, before the normal warm water is reheated.

[0003] To address the issues inherent in gas water heaters, the following three solutions are generally used to eliminate or mitigate their impact: 1. Preheat all water in the pipes using a circulating pump to ensure hot water is available at all times when the tap is turned on. 2. Start-stop preheating: When the water supply is detected to be off, intermittently preheat the heat exchanger with a small flame to maintain its temperature and reduce restart delay. 3. Bypass mixing: Design an internal bypass pipe to mix some of the heated water with the cold water during initial startup, preventing a direct flow of completely cold water and ensuring a smoother transition.

[0004] However, the existing solutions mentioned above have the following shortcomings: the solutions are relatively complex to implement, require water pumps and specific detectors, have high implementation costs, and cannot eliminate or alleviate the problem of excessively hot or cold water in the gas water heaters that are already in large quantities and have not been treated. Utility Model Content

[0005] The purpose of this invention is to address the problems existing in the background technology by proposing a balanced outlet water temperature structure for water heaters. The structure is simple, the cost is low, and it can be modified on existing gas water heaters to achieve balanced outlet water temperature.

[0006] The technical solution of this utility model is a balanced outlet water temperature structure for a water heater, including a heat exchanger and a connecting pipe; the heat exchanger has a pipe one and a pipe two, the two ends of the pipe one are the pipe one input end and the pipe one output end respectively, and the two ends of the pipe two are the pipe two input end and the pipe two output end respectively; the two ends of the connecting pipe are respectively connected to the pipe one output end and the pipe two input end.

[0007] Preferably, the heat exchanger is a tubular heat exchanger, a plate heat exchanger, or a heat pipe heat exchanger.

[0008] Preferably, when the heat exchanger is a plate heat exchanger, it includes plates and gaskets, the plates being made of stainless steel, titanium alloy, copper, or aluminum, and having a corrugated surface.

[0009] Preferably, the input end of pipe one is connected to the output end of the water heater through a hot water pipe, and the output end of pipe two is connected to a water outlet pipe.

[0010] Preferably, the sum of the volume of the first pipe and the volume of the connecting pipe is 1 / 2 or more of the volume of the superheated or supercooled water.

[0011] Compared with existing technologies, this utility model has the following beneficial technical effects: This utility model has a simple structure and low cost. It can be modified on existing gas water heaters to achieve balanced outlet water temperature. The temperature difference between the balanced water and normal hot water is significantly reduced, the water temperature becomes smoother, and user comfort is improved. This structure can be placed inside a gas water heater to create an integrated new type of gas water heater, or it can be installed externally as a supplement or improvement to existing gas water heaters. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure when the present invention is applied; Figure 2 This is a schematic diagram of a plate heat exchanger. Reference numerals in the attached diagram: 1. Heat exchanger; 11. Inlet of pipe one; 12. Outlet of pipe one; 13. Inlet of pipe two; 14. Outlet of pipe two; 2. Connecting pipe. Detailed Implementation

[0013] like Figure 1 and Figure 2 As shown in the figure, the balanced outlet water temperature structure for a water heater proposed in this embodiment includes a heat exchanger 1 and a connecting pipe 2.

[0014] Heat exchanger 1 has tube 1 and tube 2. The two ends of tube 1 are tube 1 input terminal 11 and tube 1 output terminal 12, respectively. The two ends of tube 2 are tube 2 input terminal 13 and tube 2 output terminal 14, respectively.

[0015] Heat exchanger 1 is a tubular heat exchanger, a plate heat exchanger, or a heat pipe heat exchanger, using existing mature products. All three types of heat exchangers can achieve the desired heat exchange effect. For example... Figure 2 As shown, taking a plate heat exchanger as an example, when heat exchanger 1 is a plate heat exchanger, it includes plates and gaskets. The plates are made of stainless steel, titanium alloy, copper or aluminum, and have corrugated surfaces to increase the heat transfer area and fluid turbulence. The gaskets prevent fluid medium leakage and ensure that the two fluid media flow in their respective channels and exchange heat.

[0016] Pipe 1 input terminal 11 is connected to the water heater output terminal via a hot water pipe, and pipe 2 output terminal 14 is connected to a water outlet pipe, which is connected to a shower head and a hot water faucet. The water output from the water heater flows through the hot water pipe to the heat exchanger 1. After the water is balanced by the heat exchanger 1, the water with the balanced temperature is output through the water outlet pipe to the shower head and the hot water faucet for user use.

[0017] Connecting pipe 2 is connected to the output end 12 of pipe 1 and the input end 13 of pipe 2, respectively. The sum of the volumes of pipe 1 and connecting pipe 2 is 1 / 2 or more of the volume of the superheated or supercooled water. After heat exchange treatment by heat exchanger 1, the temperature difference between the abnormal water and the normal hot water is greatly reduced, making the temperature fluctuations in the whole process, although not completely eliminated, very smooth, so that they are basically imperceptible during use. According to a typical estimate, when using the water heater, the water flow rate is 12 liters / minute, and the cold water output time caused by the ignition delay is 4 seconds. Therefore, the sum of the above volumes must be greater than or equal to 12000 / 60*4*0.5=400 (ml). If the water flow rate is other parameters, the sum of the above volumes needs to be adjusted accordingly.

[0018] This embodiment features a simple structure and low cost. It can be modified on existing gas water heaters to achieve balanced outlet water temperature. When abnormal water (overly hot or underly cold water) output from the gas water heater passes through pipe one, it exchanges heat with the hot water in pipe two (the water remaining in pipe two when the gas water heater is turned off). The water temperature in pipe one gradually changes towards that in pipe two. When the water in pipe one enters pipe two through connecting pipe 2, it is close to the set water temperature of the gas water heater and continues to exchange heat with the water in pipe one, achieving water temperature balance. Finally, the balanced water is discharged from the outlet 14 of pipe two. The temperature difference between the balanced water and normal hot water is significantly reduced, and the water temperature becomes more stable. This structure can be placed inside the gas water heater to create a new integrated gas water heater, or it can be installed outside the gas water heater as a supplement or improvement to the existing gas water heater. Both design methods can balance the overly hot or underly cold water output by the gas water heater, resulting in a more uniform final output water temperature and improved user comfort.

[0019] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited thereto. Various changes can be made within the scope of knowledge possessed by those skilled in the art without departing from the spirit of the present invention.

Claims

1. A balanced outlet water temperature structure for a water heater, characterized in that, include: The heat exchanger (1) has a tube 1 and a tube 2. The two ends of the tube 1 are the tube 1 input end (11) and the tube 1 output end (12), respectively, and the two ends of the tube 2 are the tube 2 input end (13) and the tube 2 output end (14). Connecting tube (2), with its two ends connected to the output end (12) of tube one and the input end (13) of tube two, respectively.

2. The balanced outlet water temperature structure for a water heater according to claim 1, characterized in that, The heat exchanger (1) is a tubular heat exchanger, a plate heat exchanger, or a heat pipe heat exchanger.

3. The balanced outlet water temperature structure for a water heater according to claim 2, characterized in that, When the heat exchanger (1) is a plate heat exchanger, it includes plates and gaskets. The plates are made of stainless steel, titanium alloy, copper or aluminum and have a corrugated surface.

4. The balanced outlet water temperature structure for a water heater according to claim 1, characterized in that, The input end (11) of pipe one is connected to the output end of the water heater through a hot water pipe, and the output end (14) of pipe two is connected to a water outlet pipe.

5. The balanced outlet water temperature structure for a water heater according to claim 1, characterized in that, The sum of the volume of pipe 1 and the volume of connecting pipe (2) is 1 / 2 or more of the volume of superheated or supercooled water.

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