TWM599380U - Control structure of constant temperature water mixing valve for electric water heater without water flow switch - Google Patents

Abstract

An electric water heater non-flow switch thermostatic water mixing valve control structure, including a water storage bucket, a cold water pipe, a hot water pipe, a heater, a thermostatic water mixing valve, a current limiting device, a check valve, a hot water temperature detector, and a mixed water temperature detector Know device. This creation mainly installs a flow limiting device between the cold water inlet of the thermostatic mixing valve and the three-way pipe, so that the cold water in the cold water pipe can be transported to the thermostatic mixing valve through the three-way pipe and the flow limiting device for mixing operation. The check valve is arranged on the cold water pipe. The check valve is located between the three-way pipe and the inner tank. After the inner tank water is heated, the barrel pressure will squeeze the hot water back into the cold water pipe and the check valve prevents the water in the inner tank from returning. The hot water temperature detector is arranged at the hot water inlet of the thermostatic mixing valve, and the mixed outlet water temperature detector is arranged at the mixing outlet of the thermostatic mixing valve. This creation uses a non-water flow switch to prevent scale, and there is no minimum water volume problem that makes it impossible to judge. The check valve prevents the temperature rise and pressure rise of the inner tank water and the high temperature backflow to the cold water pipe when the consumer uses the water. The flow limiting device restricts the flow of cold water to prevent the sudden decrease in water volume. The cold water quickly flows into the thermostatic mixing valve, causing excessive temperature drop and the water temperature may be hot and cold.

Description

Electric water heater non-flow switch thermostatic water mixing valve control structure

This creation relates to a thermostatic mixing valve control structure, especially a thermostatic mixing valve control structure for an electric water heater without water flow switch.

The prior art electronic thermostatic mixing valve control method must use a water flow switch and a flow detector to detect the water flow to start or close the thermostatic mixing valve's hot and cold water opening ratio to achieve the control set temperature. In the system, the pressure relief check valve will be installed at the front end of the water inlet of the three-way pipe. All the system connecting pipes use bellows, braided hoses, stainless steel pipes and other pipe diameters are the same, such as TW M583527.

In the above-mentioned thermostatic mixing valve control method, due to the contact of high-temperature water with the water flow switch, it is easy to produce scale and cause the switch to be abnormally stuck. In addition, the water flow switch has a minimum water volume limit. When the flow is too small, it is impossible to determine whether to start the thermostatic mixing valve. Moreover, when the electric water heater is heated, the pressure in the barrel will be as high as 7~8kg/cm ² and the inlet pressure is less than the pressure in the barrel. When the faucet is turned on, the pressure and hot water in the barrel will squeeze back into the cold water pipe. The pressure relief check valve is installed at the front end of the three-way pipe, resulting in the high temperature of the cold water pipe, and the cold water cannot enter the thermostatic mixing valve before the water is turned on, resulting in the inability to control and adjust the temperature, making the mixing water temperature too high, and waiting for the cold water after the system pressure is balanced Only after entering can be regulated. In addition, when one bathroom is taking a shower, and another bathroom is taking a shower afterwards, boiling water in the other bathroom will cause the flow rate to decrease (pull water) instantly, and the temperature of the mixed water will drop sharply. Because there is an air chamber in the tank, when the flow rate is When it becomes smaller, the cold water will be replenished until the inner tank is continuously pressurized to squeeze out a large amount of hot water. During this period, only a very small amount of hot water flows out from the hot water end of the thermostatic mixing valve, and most of the cold water is flowed from the cold water end of the thermostatic mixing valve. Inflow for mixing, so the mixing outlet temperature will drop sharply at this time, and control is performed to make the hot water opening larger, the cold water opening smaller, and the mixed outlet water temperature becomes too high. When the mixed outlet temperature is too high, control will increase the cold water opening and the hot water opening. It becomes smaller, so that the control will adjust to a stable temperature when the mixed effluent is hot and cold.

The technical problem to be solved by this creation is to provide an electric water heater no-flow switch thermostatic water mixing valve control structure for the deficiencies of the prior art, including: a water storage bucket, the water storage bucket has an inner container, and the inner container is a hollow container; A cold water pipe, the cold water pipe is connected to the inner tank, the cold water pipe can deliver cold water to the inner tank; a hot water pipe, the hot water pipe is connected to the inner tank, the hot water pipe can output the heating completed in the inner tank Hot water; a heater, the heater is set in the inner tank; a thermostatic mixing valve, the thermostatic mixing valve has a cold water inlet, a hot water inlet and a mixing outlet, the mixing outlet is connected to a mixing outlet pipe One end of the hot water pipe is connected to the hot water inlet of the thermostatic water mixing valve, so that the hot water output from the hot water pipe can be delivered to the thermostatic water mixing valve; a three-way pipe, the three-way pipe is arranged on the cold water pipe ; A flow limiting device, the flow limiting device is connected between the cold water inlet of the thermostatic mixing valve and the three-way pipe, so that the cold water in the cold water pipe can pass through the three-way pipe and the flow limiting device to be delivered to the The thermostatic water mixing valve performs the water mixing operation; a check valve is arranged on the cold water pipe, and the check valve is located between the three-way pipe and the inner tank to prevent the water in the inner tank It flows back through the cold water pipe; a hot water temperature detector, which is installed at the hot water inlet of the thermostatic mixing valve, can be used to detect that the hot water pipe is delivered to the thermostatic mixing valve The hot water temperature; a mixed water temperature detector, the mixed water temperature detector is set at the mixing outlet of the thermostatic mixing valve, can be used to detect the temperature of the mixing outlet of the thermostatic mixing valve output mixed water temperature ; A control substrate, the control substrate is electrically connected to the hot water temperature detector, the mixed water temperature detector and the thermostatic mixing valve. The temperature difference between the hot water temperature detection and the mixed outlet water temperature is used to determine whether the control of the thermostatic mixing valve enters an adjustment state.

The beneficial effect of this creation is that the electric water heater provided by this creation has no water flow switch thermostatic water mixing valve control structure, does not need to set a water flow switch, can prevent the generation of scale, and has no minimum water volume problem. Furthermore, the check valve can prevent the temperature and pressure of the inner tank water from rising and the high temperature backflow to the cold water pipe when consumers use the water. The flow-limiting device can limit the flow of cold water to prevent the sudden decrease in water volume, and the cold water quickly flows into the thermostatic mixing valve, causing the temperature to drop excessively. This creation is equipped with a hot water temperature detector and a mixed water temperature detector, which can be used to detect the hot water temperature and the mixed water temperature and then control the thermostatic mixing valve to achieve the control set temperature.

In order to have a better understanding of the features and technical content of this creation, please refer to the following detailed descriptions and drawings about this creation. However, the provided drawings are only for reference and explanation, not to limit this creation.

The following are specific specific examples to illustrate the implementation manners disclosed in this creation, and those skilled in the art can understand the advantages and effects of this creation from the content disclosed in this specification. This creation can be implemented or applied through other different specific embodiments, and various details in this specification can also be modified and changed based on different viewpoints and applications without departing from the concept of this creation. In addition, the drawings in this creation are merely schematic illustrations, and are not depicted in actual size, and are stated in advance. The following embodiments will further describe the related technical content of this creation in detail, but the disclosed content is not intended to limit the protection scope of this creation. In addition, the term "or" used in this document may include any one or a combination of more of the associated listed items depending on the actual situation.

[First Embodiment]

Please refer to Figure 1. This creation provides an electric water heater no-flow switch thermostatic water mixing valve control structure, including a water storage bucket 1, a cold water pipe 2, a hot water pipe 3, a heater 4, a thermostatic water mixing valve 5, one Flow limiting device 6, a check valve 7, a hot water temperature detector 8 and a mixed outlet water temperature detector 9. The electric water heater of the invention can be directly or horizontally hung. In this embodiment, it is disclosed that the electric water heater is a straight hung mode.

The water storage bucket 1 has an inner container 11, the inner container 11 is a hollow container, the inner container 11 can contain the water to be heated, the inner container 11 can be made of metal or non-metallic material, the inner container 11 The material and shape are not limited, and can be changed appropriately as needed.

The cold water pipe 2 and the hot water pipe 3 are connected to the inner tank 11, and the cold water pipe 2 and the hot water pipe 3 can extend into the inner tank 11. The cold water pipe 2 can be connected to a water source, so that cold water can be delivered to the inner tank 11 through the cold water pipe 2 and the hot water heated in the inner tank 11 can be output through the hot water pipe 3. The cold water pipe 2 and the hot water pipe 3 can be connected to the bottom or side walls of the inner tank 11. In this embodiment, the cold water pipe 2 and the hot water pipe 3 are both connected to the bottom of the inner tank 11.

The heater 4 can be a heating device such as an electric heating tube. The heater 4 is arranged in the inner container 11, and the heater 4 can be fixed to the bottom or side wall of the inner container 11. In this embodiment, the heater 4 is fixed in the inner container 11 The bottom of the gallbladder 11.

The thermostatic water mixing valve 5 can be arranged inside the water storage bucket 1. The thermostatic water mixing valve 5 is a thermostatic valve. The structure of the thermostatic water mixing valve 5 is not limited. The thermostatic water mixing valve 5 can be set according to the water The ratio of warm mixed cold water and hot water is used to control the temperature of mixed water. The thermostatic water mixing valve 5 has a cold water inlet 51, a hot water inlet 52, and a mixing outlet 53, the cold water inlet 51 and the hot water inlet 52 can respectively input cold water and hot water, and the mixed water from the mixing outlet 53 and a mixed outlet pipe 10 connected to the mixing outlet 53 to output. Since the thermostatic water mixing valve 5 is in the prior art, and the present invention does not limit the structure of the thermostatic water mixing valve 5, it will not be repeated.

The cold water pipe 2 is provided with a three-way pipe 20. The three-way pipe 20 is a pipe joint with three openings. The flow limiting device 6 is connected between the cold water inlet 51 of the thermostatic water mixing valve 5 and the three-way pipe 20, That is, the two ends of the flow limiting device 6 are respectively connected to the cold water inlet 51 of the thermostatic mixing valve 5 and an opening of the three-way pipe 20, so that the cold water in the cold water pipe 2 can not only be input into the inner tank 11, but also pass The three-way pipe 20 and the flow limiting device 6 are sent to the thermostatic water mixing valve 5 to perform water mixing operation.

In this embodiment, the restrictor 6 is a restrictor tube. The diameter of the restrictor can be 3mm to 7mm. The diameter of the restrictor is smaller than that of the cold water pipe 2, so that the cold water can pass through the restrictor. At 6 o'clock, the function of limiting the flow can be produced to limit the flow of cold water. The flow limiting device 6 can also be used in any part shape and the cross-sectional area through which the water flows is 7mm ² to 38mm ² can produce a flow limiting effect.

One end (outlet end) of the hot water pipe 3 is connected to the hot water inlet 52 of the thermostatic water mixing valve 5, so that the hot water output from the hot water pipe 3 (outlet end) can be delivered to the thermostatic water mixing valve 5 for mixing operation. After being mixed with hot water, it is output through the mixing outlet 53 of the thermostatic mixing valve 5 and the mixing outlet pipe 10.

The check valve 7 is arranged on the cold water pipe 2, and the check valve 7 is located between the three-way pipe 20 and the inner liner 11, that is, the check valve 7 is installed at the rear end (downstream position) of the three-way pipe 20. The check valve 7 has a check function, so that the cold water can only be input to the inner tank 11 through the cold water pipe 2 in one direction, and the water in the inner tank 11 cannot flow back through the cold water pipe 2 to the three-way pipe 20 and the flow limiting device. 6 and the thermostatic mixing valve 5, etc., the check valve 7 can effectively prevent the temperature rise and pressure increase of the water in the inner tank 11 and the high temperature backflow to the cold water pipe 2 when consumers use water.

In this embodiment, a pressure relief check valve 30 may be further provided on the end of the cold water pipe 2 far away from the water storage bucket 1, and the pressure relief check valve 30 is installed at the front end (upstream position) of the three-way pipe 20. The pressure relief check valve 30 has a check function, so that cold water can only be input to the inner tank 11, the flow limiting device 6, and the thermostatic mixing valve 5 through the cold water pipe 2 in one direction.

The hot water temperature detector 8 is arranged at the hot water inlet 52 of the thermostatic water mixing valve 5. The hot water temperature detector 8 can be arranged on the thermostatic mixing valve 5 or on the hot water pipe 3 close to the thermostatic mixing valve 5 The hot water temperature detector 8 can be used to detect the temperature of the hot water delivered from the hot water pipe 3 to the thermostatic mixing valve 5 at the location of the hot water inlet 52.

The mixed outlet water temperature detector 9 is arranged at the mixing outlet 53 of the thermostatic mixing valve 5. The mixed outlet temperature detector 9 can be arranged on the thermostatic mixing valve 5 or on the mixing outlet pipe 10 close to the thermostatic mixing valve 5. At the position of the mixing outlet 53, the mixed water temperature detector 9 can be used to detect the temperature of the mixed water output from the mixing outlet 53 of the thermostatic water mixing valve 5.

The temperature of the heater 4, 5 thermostatic mixing valve, the hot water temperature detecting unit 8 and mixed water temperature detecting means 9 and the like may be electrically connected to a control board 40 for controlling the electric water heater mixing valve . The hot water temperature detector 8 and the mixed outlet water temperature detector 9 can be used to detect the temperature of hot water and mixed water respectively, and use the temperature difference to determine whether the control thermostatic mixing valve 5 enters the adjustment state, and then control the thermostatic mixing Water valve 5 to reach the control set temperature.

[Second Embodiment]

Referring to FIG. 2, the control structure of the thermostatic water mixing valve for the electric water heater without water flow switch disclosed in this embodiment also includes a water storage bucket 1, a cold water pipe 2, a hot water pipe 3, a heater 4, and a thermostatic water mixing valve 5. , A flow limiting device 6, a check valve 7, a hot water temperature detector 8 and a mixed water temperature detector 9. The structure and actions of this embodiment are substantially the same as the above-mentioned first embodiment. The only difference is that the electric water heater is disclosed in this embodiment to be in a horizontal hanging mode.

[Beneficial effects of the embodiment]

The beneficial effect of this creation is that the electric water heater provided by this creation has no water flow switch thermostatic water mixing valve control structure, does not need to set a water flow switch, can prevent the generation of scale, and has no minimum water volume problem. Furthermore, the check valve can effectively prevent the temperature rise and pressure increase of the inner tank water and the high temperature backflow to the cold water pipe when consumers use the water. The flow-limiting device can limit the flow of cold water to prevent the sudden decrease in water volume. The cold water quickly flows into the thermostatic mixing valve and causes excessive temperature drop. This creation is equipped with a hot water temperature detector and a mixed water temperature detector, which can be used to detect the hot water temperature and the mixed water temperature and then control the thermostatic mixing valve to achieve the control set temperature.

The content disclosed above is only a preferred and feasible embodiment of the creation, and does not limit the scope of the patent application for this creation. Therefore, all equivalent technical changes made using the creation specification and schematic content are included in the application for this creation. Within the scope of the patent.

1: water storage bucket 11: Liner 2: cold water pipe 3: Hot water pipe 4: heater 5: Thermostatic mixing valve 51: cold water inlet 52: Hot water inlet 53: Mixed outlet 6: Current limiting device 7: Check valve 8: Hot water temperature detector 9: Mixing water temperature detector 10: Mixing outlet pipe 20: Tee 30: Pressure relief check valve 40: control board

Figure 1 is a schematic diagram of the control structure of the thermostatic mixing valve of the electric water heater without water flow switch according to the first embodiment of the creation.

Fig. 2 is a schematic diagram of the control structure of the non-flow switch thermostatic water mixing valve of the electric water heater according to the second embodiment of the creation.

1: water storage bucket

11: Liner

2: cold water pipe

3: Hot water pipe

4: heater

5: Thermostatic mixing valve

51: cold water inlet

52: Hot water inlet

53: Mixed outlet

6: Current limiting device

7: Check valve

8: Hot water temperature detector

9: Mixing water temperature detector

10: Mixing outlet pipe

20: Tee

30: Pressure relief check valve

40: control board

Claims (8)

An electric water heater no-flow switch thermostatic water mixing valve control structure, including: A water storage bucket, the water storage bucket has an inner container, and the inner container is a hollow container; A cold water pipe, the cold water pipe is connected to the inner tank, and the cold water pipe can transport cold water to the inner tank; A hot water pipe connected to the inner tank, and the hot water pipe can output the hot water heated in the inner tank; A heater, the heater is arranged in the inner container; A thermostatic water mixing valve with a cold water inlet, a hot water inlet and a mixing outlet, the mixing outlet is connected to a mixing water outlet pipe, and one end of the hot water pipe is connected to the hot water inlet of the thermostatic water mixing valve , So that the hot water output from the hot water pipe can be delivered to the thermostatic water mixing valve; A three-way pipe, the three-way pipe is arranged on the cold water pipe; A flow limiting device connected between the cold water inlet of the thermostatic mixing valve and the three-way pipe, so that the cold water in the cold water pipe can be delivered to the constant temperature through the three-way pipe and the flow limiting device The water mixing valve performs water mixing operation; A check valve, the check valve is arranged on the cold water pipe, the check valve is located between the three-way pipe and the inner tank, so that the water in the inner tank cannot flow back through the cold water pipe; A hot water temperature detector, which is arranged at the hot water inlet of the thermostatic water mixing valve and can be used to detect the temperature of hot water delivered by the hot water pipe to the thermostatic water mixing valve; A mixed effluent temperature detector, which is arranged at the mixing outlet of the thermostatic mixing valve and can be used to detect the temperature of the mixed water output by the mixing outlet of the thermostatic mixing valve; and A control substrate is electrically connected with the hot water temperature detector, the mixed outlet water temperature detector and the thermostatic water mixing valve. According to claim 1, the non-flow switch thermostatic water mixing valve control structure of an electric water heater, wherein the thermostatic water mixing valve is arranged inside the water storage bucket. According to the control structure for the thermostatic water mixing valve of an electric water heater without a water flow switch according to claim 1, wherein the current limiting device is a current limiting pipe, and the pipe diameter of the current limiting pipe is 3 mm to 7 mm. According to claim 1, the non-flow switch thermostatic water mixing valve control structure of an electric water heater, wherein the cross-sectional area through which the water flow of the flow limiting device passes is 7 mm ² to 38 mm ² . According to claim 1, the non-flow switch thermostatic water mixing valve control structure of the electric water heater, wherein the cold water pipe is provided with a pressure relief check valve at the end far away from the water storage bucket, and the pressure relief check valve is installed on the three-way pipe The upstream position. According to claim 1, the non-flow switch thermostatic water mixing valve control structure of an electric water heater, wherein the check valve is installed at a downstream position of the three-way pipe. According to claim 1, the non-flow switch thermostatic mixing valve control structure of an electric water heater, wherein the hot water temperature detector is arranged on the thermostatic mixing valve or the hot water pipe close to the hot water inlet of the thermostatic mixing valve s position. According to claim 1, the non-flow switch thermostatic water mixing valve control structure of an electric water heater, wherein the mixed outlet water temperature detector is arranged on the thermostatic water mixing valve or the mixing outlet pipe is close to the mixing outlet of the thermostatic water mixing valve s position.

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