Water supply cut-off low-temperature-rise structure of water tank of hot water heating equipment

Abstract

The utility model discloses a water supply cut-off low temperature rise structure of a water tank of hot water heating equipment, which belongs to the technical field of hot water heating equipment and comprises fins, a stainless steel water tank and a heat exchange tube. The heat exchange pipe is coiled on the fins and the stainless steel water tank, and a bypass pipe is communicated between a coiled initial section pipe and a coiled tail section pipe of the heat exchange pipe. According to the structure, the by-pass pipe is arranged between the initial section pipe and the tail section pipe of the heat exchange pipe, so that the initial section pipe and the tail section pipe can be communicated with each other through the by-pass pipe, and cold water which does not flow through the fins and does not absorb heat in the stainless steel water tank can be mixed with high-temperature water flowing out of the heat exchange pipe; the water outlet temperature of the hot water heating equipment when water is supplied again after water supply is stopped is reduced, the situation that a user is scalded by high-temperature water generated when the hot water heating equipment is started and stopped is avoided, the use comfort of the user is effectively improved, extra noise and electric energy waste cannot be generated, and practicability is high.

Description

Technical Field

[0001] The utility model relates to the technical field of hot water heating equipment, in particular to a structure with low temperature rise of a water tank of a hot water heating equipment when water supply stops. Background Art

[0002] The heat exchange systems of existing gas water heaters or wall-mounted boilers, such as Figure 1 , 2 shown in the figure, are usually composed of components such as a fin 1', a water inlet joint 2', a water outlet joint 3', a stainless steel water tank 4', and a heat exchange tube 5'. Among them, the heat exchange tube 5' is arranged on the stainless steel water tank 4', and the water inlet joint 2' and the water outlet joint 3' are respectively communicated with both ends of the heat exchange tube 5' to form a water flow channel, and the fin 1' is cooperatively connected with the heat exchange tube 5'; its heat exchange principle is: the fin 1' absorbs heat from high-temperature flue gas and then transfers it to the heat exchange tube 5', and the heat exchange tube 5' then transfers the heat to the water inside it. During normal use, the combustion heat of the gas water heater or wall-mounted boiler and the heat absorbed by the fin 1' reach a balance, and the outlet water temperature is basically constant at the set outlet water temperature. However, after the user closes the outlet valve, the fin 1' continuously absorbs the heat of the high-temperature flue gas and then transfers it to the water through the heat exchange tube 5'. At this time, the water in the heat exchange tube 5' does not flow and continuously absorbs heat, resulting in a continuous increase in the water temperature in the heat exchange tube 5'. When the user opens the outlet valve again, the high-temperature water in the heat exchange tube 5' will cause scalding to the user.

[0003] To solve the above problems, the prior art has developed a method to reduce the temperature rise of the water in the water tank by relying on post-cleaning by the fan. For example, a control method for a gas water heater and a gas water heater disclosed in the invention application with Chinese patent number CN201910554137.4 still has the following deficiencies: 1. The heat inertia of the stainless steel water tank is very large, and the effect of reducing the temperature by simply relying on post-cleaning by the fan is poor; 2. The post-cleaning by the fan brings additional noise; 3. The post-cleaning by the fan causes waste of electric energy.

[0004] Therefore, it is necessary to further improve. Content of the Utility Model

[0005] The utility model aims to provide a structure with low temperature rise of a water tank of a hot water heating equipment when water supply stops to overcome the deficiencies in the prior art.

[0006] A structure with low temperature rise of a water tank of a hot water heating equipment designed according to this purpose includes a fin, a stainless steel water tank, and a heat exchange tube. The fin is arranged on the stainless steel water tank, and the heat exchange tube is coiled around the fin and the stainless steel water tank, and a bypass pipe is communicated between the initial section pipe and the tail section pipe of the coil.

[0007] The bypass pipe is located outside the fin and the stainless steel water tank.

[0008] The diameter of the bypass pipe is smaller than that of the heat exchange pipe.

[0009] The water flow rate inside the bypass pipe accounts for 20%-40% of the total water flow rate of the heat exchange pipe.

[0010] The outer end of the initial section pipe is located outside the fin and the stainless steel water tank, and is connected with a water inlet joint. The outer end of the tail section pipe is located outside the fin and the stainless steel water tank, and is connected with a water outlet joint.

[0011] Both ends of the bypass pipe are respectively connected to the ends of the initial section pipe and the tail section pipe located outside the fin and the stainless steel water tank.

[0012] The water flowing in the initial section pipe is divided into the bypass pipe located outside the fin and the stainless steel water tank, and the heat exchange pipe located on the fin and the stainless steel water tank. The water flowing in the bypass pipe and the heat exchange pipe converges into the tail section pipe located outside the fin and the stainless steel water tank.

[0013] Through the improvement of the above structure, the present utility model builds a bypass pipe between the initial section pipe and the tail section pipe of the heat exchange pipe, enabling the initial section pipe and the tail section pipe to be interconnected through the bypass pipe. Thus, the cold water that has not flowed through the fin and the stainless steel water tank and has not absorbed heat can be mixed with the high-temperature water flowing out of the heat exchange pipe, so as to reduce the outlet water temperature when the hot water heating equipment supplies water again after stopping water supply, and avoid the situation that the hot water heating equipment scalds users when starting and stopping, not only effectively improving the user's comfort, but also not generating additional noise and power waste, and having strong practicability. Description of the Drawings

[0014] Figure 1 It is a schematic assembly structure diagram of a fin, a water inlet joint, a water outlet joint, a stainless steel water tank, and a heat exchange pipe of the prior art.

[0015] Figure 2 It is another perspective schematic assembly structure diagram of a fin, a water inlet joint, a water outlet joint, a stainless steel water tank, and a heat exchange pipe of the prior art.

[0016] Figure 3 It is a schematic assembly structure diagram of a water inlet joint, a water outlet joint, a heat exchange pipe, an initial section pipe, a tail section pipe, a stainless steel water tank, and a bypass pipe of an embodiment of the present utility model.

[0017] Figure 4 It is another perspective schematic assembly structure diagram of a water inlet joint, a water outlet joint, a heat exchange pipe, an initial section pipe, a tail section pipe, a stainless steel water tank, and a bypass pipe of an embodiment of the present utility model.

[0018] Figure 5Schematic diagram of the assembly structure of the water inlet joint, water outlet joint, heat exchange pipe, initial section pipe, tail section pipe, stainless steel water tank, and bypass pipe from another perspective according to an embodiment of the present utility model. Detailed implementation manners

[0019] In order to make the above objects, features, and advantages of the present utility model more obvious and understandable, the following will describe in detail the specific implementation manners of the present utility model with reference to the accompanying drawings. Many specific details are set forth in the following description in order to fully understand the present utility model. However, the present utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present utility model. Therefore, the present utility model is not limited by the specific embodiments disclosed below.

[0020] The present utility model will be further described below with reference to the accompanying drawings and embodiments.

[0021] Refer to Figures 1-5 , the water tank stop water low temperature rise structure of this hot water heating device includes fins 1, a stainless steel water tank 4, and a heat exchange pipe 5. The fins 1 are arranged on the stainless steel water tank 4. The heat exchange pipe 5 is wound around the fins 1 and the stainless steel water tank 4, and a bypass pipe 6 is connected between the initial section pipe 5.1 and the tail section pipe 5.2 of the winding.

[0022] In this embodiment, a bypass pipe 6 is built between the initial section pipe 5.1 and the tail section pipe 5.2 of the heat exchange pipe 5, so that the initial section pipe 5.1 and the tail section pipe 5.2 can be interconnected through the bypass pipe 6, so that the cold water that has not flowed through the fins 1 and the stainless steel water tank 4 and has not absorbed heat can be mixed with the high-temperature water flowing out of the heat exchange pipe 5, so as to reduce the outlet water temperature when the hot water heating device supplies water again after stopping water supply, and avoid the situation that the high-temperature water generated by the start and stop of the hot water heating device scalds users. This not only effectively improves the user's comfort, but also does not generate additional noise and power waste, and has strong practicability.

[0023] This embodiment can be applied to hot water heating devices such as gas water heaters or wall-mounted boilers, and can realize the temperature rise of the water temperature of the gas water heater or wall-mounted boiler again after stopping water supply, so as to achieve the purpose of improving the user's comfort.

[0024] The bypass pipe 6 is located outside the fins 1 and the stainless steel water tank 4. Thus, the water in the bypass pipe 6 will not have heat transfer with the fins 1 and the stainless steel water tank 4. The water in the bypass pipe 6 is cold water, and after it is mixed with the high-temperature water in the tail section pipe 5.2, the purpose of reducing the temperature rise during water stop can be achieved.

[0025] The diameter of the bypass pipe 6 cannot be too large. Otherwise, when the water flow through the bypass pipe 6 is large, it will surely reduce the water flow through the heat exchange pipe 5. After the water flow through the heat exchange pipe 5 decreases, it will surely increase the water temperature in the heat exchange pipe 5 during normal use. At the same time, it will also reduce the heat exchange efficiency of the heat exchange pipe 5. Moreover, when the water temperature in the heat exchange pipe 5 reaches the maximum limit temperature, it will also affect the operation logic of the hot water heating equipment.

[0026] Therefore, the diameter of the bypass pipe 6 is smaller than that of the heat exchange pipe 5, that is, the water flow rate of the bypass pipe 6 is smaller than that of the heat exchange pipe 5.

[0027] The internal water flow rate of the bypass pipe 6 accounts for 20%-40% of the total water flow rate of the heat exchange pipe 5.

[0028] In this embodiment, according to the calculation of the thermal inertia of the stainless steel water tank 4, it is appropriate that the internal water flow rate of the bypass pipe 6 accounts for 30%±3 of the total water flow rate of the heat exchange pipe 5.

[0029] The outer end of the initial section pipe 5.1 is located outside the fin 1 and the stainless steel water tank 4 and is connected with a water inlet joint 2. The outer end of the tail section pipe 5.2 is located outside the fin 1 and the stainless steel water tank 4 and is connected with a water outlet joint 3.

[0030] Both ends of the bypass pipe 6 are respectively connected to the ends of the initial section pipe 5.1 and the tail section pipe 5.2 located outside the fin 1 and the stainless steel water tank 4.

[0031] The water flowing in the initial section pipe 5.1 is divided into the bypass pipe 6 located outside the fin 1 and the stainless steel water tank 4 and the heat exchange pipe 5 located on the fin 1 and the stainless steel water tank 4. The water flowing in the bypass pipe 6 and the heat exchange pipe 5 merges into the tail section pipe 5.2 located outside the fin 1 and the stainless steel water tank 4.

[0032] In this embodiment of the present person, the water at the water supply end enters the initial section pipe 5.1 through the water inlet joint 2. The water in the initial section pipe 5.1 is divided into the bypass pipe 6 and the heat exchange pipe 5. Among them, the water flowing in the bypass pipe 6 is cold water, and the water flowing in the heat exchange pipe 5 exchanges heat with the fin 1 and the stainless steel water tank 4 and forms high-temperature water. The cold water in the bypass pipe 6 and the high-temperature water in the heat exchange pipe 5 merge into the tail section pipe 5.2 and then flow out through the water outlet joint 3.

[0033] In this embodiment, the hot water heating equipment is set with a water outlet temperature of 42°C.

[0034] The actual water outlet temperature when the water supply is stopped and then restarted: 60°C * 70% + 20°C * 30% = 42 + 6 = 48°C; the corresponding temperature rise when the water supply is stopped: 48°C - 42°C = 6°C.

[0035] Among them: 60°C is the outlet water temperature when the stainless-steel water tank 4 stops and then resumes supplying water, 70% is the flow rate ratio of the heat exchange pipe 5, 20°C is the inlet water temperature, the water temperature in the bypass pipe 6 is also 20°C, 30% is the water flow rate ratio of the bypass pipe 6, 48°C is the actual outlet water temperature after stopping and then resuming supplying water finally. Calculate the temperature rise during water stoppage: 48°C minus 42°C equals 6°C.

[0036] Combined with the existing technology of cleaning behind the fan to conduct air cooling on the heat exchange pipe 5, it can make the final temperature rise during water stoppage of the hot water heating equipment about 5°C, which can effectively reduce the temperature rise during water stoppage.

[0037] The above is the preferred solution of the present invention, which shows and describes the basic principle, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of the present invention claimed is defined by the appended claims and their equivalents.

Claims

1. A water tank water stop low temperature rise structure for hot water heating equipment, comprising fins (1), a stainless steel water tank (4) and a heat exchange tube (5), characterized in that: The fin (1) is arranged on the stainless steel water tank (4), the heat exchange tube (5) is coiled on the fin (1) and the stainless steel water tank (4), and a bypass tube (6) is connected between the coiled first section tube (5.1) and the coiled tail section tube (5.2).

2. The water tank water stop low temperature rise structure of the hot water heating equipment according to claim 1, characterized in that: The bypass pipe (6) is located outside the fin (1) and the stainless steel water tank (4).

3. The water tank water stop low temperature rise structure of the hot water heating equipment according to claim 1, characterized in that: The diameter of the bypass pipe (6) is smaller than the diameter of the heat exchange pipe (5).

4. The water tank water stop low temperature rise structure of the hot water heating equipment according to claim 1, characterized in that: The water flow rate inside the bypass pipe (6) accounts for 20%-40% of the total water flow rate of the heat exchange pipe (5).

5. The water tank water stop low temperature rise structure of the hot water heating equipment according to claim 1, characterized in that: The outer end of the initial tube (5.1) is located outside the fin (1) and the stainless steel water tank (4) and is connected to a water inlet joint (2), and the outer end of the tail tube (5.2) is located outside the fin (1) and the stainless steel water tank (4) and is connected to a water outlet joint (3).

6. The water tank water stop low temperature rise structure of the hot water heating equipment according to claim 5, characterized in that: The two ends of the bypass pipe (6) are respectively connected to the ends of the initial section pipe (5.1) and the tail section pipe (5.2) located outside the fin (1) and the stainless steel water tank (4).

7. The water tank water stop low temperature rise structure of the hot water heating equipment according to claim 5, characterized in that: The water flowing in the initial tube (5.1) is divided into the bypass tube (6) located outside the fin (1) and the stainless steel water tank (4), and the heat exchange tube (5) located on the fin (1) and the stainless steel water tank (4), and the water flowing in the bypass tube (6) and the heat exchange tube (5) is combined and flows into the tail tube (5.2) located outside the fin (1) and the stainless steel water tank (4).

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