CN207379043U - A zero-cold water heater - Google Patents

Abstract

The utility model discloses create and relate to water heater technical field, concretely relates to zero cold water heater. The utility model provides a zero cold water heater, includes the body, installs this internal heat exchange device, the inside inlet channel who has water supply connector and the inside outlet pipe who has water supply connector be provided with the circulating pump on the inside inlet pipe, circulating pump running state's play water direction with the rivers direction of inside inlet pipe is unanimous the circulating pump is intake and is gone out the water end and connect parallel pipeline be provided with a check valve on the parallel pipeline, a check valve enables rivers and follows the circulating pump is intake and is held the flow direction circulating pump play water end. The water heater can solve the problem that the water flow of the water heater with the zero cold water function in the prior art is insufficient in an open-circuit state.

Description

A zero-cold water heater

technical field

The utility model relates to the technical field of water heaters, in particular to a zero cold water water heater.

Background technique

At present, the waterway structure of zero-cold water gas water heaters on the market is divided into two-pipe scheme (without return water joint) and three-pipe scheme (with return water joint). As shown in Figures 7 and 8, the zero-cooled water gas water heater adopts the two-pipe scheme, and a circulation pump 2 is connected in series in the water circuit inside the machine. As shown in Figure 7, when the water heater is in open circuit use, the circulation pump does not run, and the flow of water through the open circuit is affected by the diameter of the circulation pump. As shown in Figure 8, when the water heater is in circulation preheating, the closed-circuit flow rate depends on the specification selection of the circulation pump.

As shown in Figures 9 and 10, the zero-cooled water gas water heater adopting the three-pipe scheme is provided with a bypass branch connected to the return water joint at the water inlet end of the machine, and a circulating pump 2 and a one-way water heater are installed on the bypass branch. valve 30. As shown in Fig. 9, when the water heater is in an open circuit state, tap water does not flow through the circulation pump 2, and the water flow rate is not affected by the circulation pump. As shown in FIG. 10 , when the water heater is in circulation preheating, the stored water in the hot water pipeline flows through the return pipe and the return joint, and flows back to the circulation pump 2 again.

For large liters of zero-cold water gas water heaters, users are concerned about the large flow rate of the open circuit shower. If the conventional two-pipe scheme is adopted, a large-diameter circulation pump must be selected, and the large-diameter circulation pump has a large volume, many consumables, weak pressure resistance, and low cost. high. Therefore, gas water heaters with large liters and zero cold water on the market mainly adopt a three-pipe scheme to ensure the flow of water through the open circuit. However, the three-pipe scheme needs to lay a return pipe in advance, and the initial investment cost of the user is high, and it is difficult to modify the renovated commercial housing.

Utility model content

The purpose of the utility model is to solve the technical problem of insufficient water flow in the open state of the zero-cold water heater in the prior art. The utility model proposes a zero-cold water heater.

A zero-cold water water heater, comprising a body, a heat exchange device installed in the body, an internal water inlet pipeline with a water inlet joint and an internal water outlet pipeline with a water outlet joint, and the inner water inlet pipeline is provided with Circulation pump, the water outlet direction of the circulation pump in the running state is consistent with the water flow direction of the internal water inlet pipeline, parallel pipelines are connected between the water inlet and outlet ends of the circulation pump, and a first One-way valve, the first one-way valve can make water flow from the water inlet end of the circulation pump to the water outlet end of the circulation pump. When the water heater is in an open circuit, that is, the circulation pump is not running, the water flows through the circulation pump and the parallel pipeline to join the internal water inlet pipeline. At this time, the water heater has a large water flow, which overcomes the insufficient diameter of the circulation pump. The problem. When the water heater is in a closed circuit state, that is, the circulation pump is running, a relative negative pressure is formed at the water inlet end of the circulation pump, and a relatively positive pressure is formed at the water outlet end of the circulation pump. The conduction direction of the first one-way valve is opposite to that of the first one-way valve, so that the stored water in the internal water inlet pipeline can be prevented from flowing back to the water inlet end of the circulation pump through the parallel pipeline.

Further, a diversion three-way valve is provided at the water inlet end of the circulation pump, and a confluence three-way valve is provided at the water outlet end of the circulation pump. One end of the parallel pipeline is connected to a diversion three-way valve, and the other end is connected to a confluence three-way valve to realize the diversion and confluence of water flow.

Further, the circulation pump and parallel pipelines are arranged inside the body. The circulation pump and the parallel pipeline are arranged inside the body, so that the water heater itself has a zero cold water function integrated without external equipment.

Further, the internal water outlet pipeline communicates with a hot water pipeline provided outside the body, the internal water inlet pipeline communicates with a cold water pipeline provided outside the body, and the hot water pipeline communicates with a cold water pipeline provided outside the body. The cold water pipeline communicates with the second one-way valve, and the conduction direction of the second one-way valve is consistent with the direction of water flowing from the hot water pipeline to the cold water pipeline. In this way, when the water heater is in a closed circuit state, that is, the circulation pump is running, the stored water in the hot water pipeline flows into the inner water inlet pipeline through the second check valve and the cold water pipeline under the action of the circulation pump, and passes through the cold water pipeline. After the heat exchange device heats up, it flows back to the hot water pipeline through the internal outlet pipeline to form a water circuit cycle, thereby completing the preheating of the water stored in the hot water pipeline and realizing the zero cold water function .

Further, the internal water outlet pipeline communicates with the hot water pipeline provided outside the body, and a bypass branch is provided on the water inlet pipeline of the circulating pump, and the bypass branch passes through the The return water pipeline outside the main body communicates with the hot water pipeline, and a third one-way valve is provided on the bypass branch, and the conduction direction of the third one-way valve is consistent with the water flow from the return water pipeline. The direction of flow to the bypass branch is the same. In this way, when the water heater is in a closed circuit state, that is, the circulation pump is running, the stored water in the hot water pipeline flows into the interior through the return water pipeline, the third one-way valve and the bypass branch under the action of the circulation pump. The water pipeline, after being heated by the heat exchange device, flows back to the hot water pipeline through the internal water outlet pipeline to form a water circuit cycle, thereby completing the preheating of the water stored in the hot water pipeline, Realize zero cold water function.

Further, the bypass branch is set inside the body. The bypass branch is arranged inside the body, and the user does not need to install the bypass branch separately.

Further, a water return joint is provided on the bypass branch, and the water return joint is arranged outside the body, so that the water return joint is convenient for quickly connecting the water return pipeline.

Compared with the prior art, the utility model has the beneficial effects:

1. The zero-cold water heater in this utility model adopts a parallel shunt structure, and the open-circuit water flow is not affected by the diameter of the circulating pump, so that large-flow water supply is realized.

2. The zero cold water water heater in the utility model can cancel the return water pipeline, saving the cost of laying pipes.

3. Due to the setting of parallel pipelines, a small circulation pump can be used to realize the circulation preheating function, saving the cost of the whole machine. In addition, under the same wall thickness of the pump body, the water pressure resistance of the miniaturized circulating pump is higher.

Description of drawings

Fig. 1 is the structural representation of the utility model embodiment 1;

Fig. 2 is a schematic structural view of embodiment 1 of the present invention when it is in an open circuit;

Fig. 3 is a structural schematic diagram of embodiment 1 of the present invention in closed-circuit cycle preheating;

Fig. 4 is the structural representation of the utility model embodiment 2;

Fig. 5 is a schematic structural view of embodiment 2 of the present invention when it is in an open circuit;

Fig. 6 is a structural schematic diagram of embodiment 2 of the present invention in closed-circuit cycle preheating;

Fig. 7 is a schematic diagram of a conventional zero-cold water gas water heater with two pipes to open a circuit for water supply;

Fig. 8 is a schematic diagram of closed-loop preheating of a conventional zero-cooled water gas water heater with two pipes;

Fig. 9 is a schematic diagram of a conventional zero-cold water gas water heater three-pipe solution for opening a circuit and passing water;

Fig. 10 is a schematic diagram of a conventional zero-cooled water gas water heater three-pipe closed-loop preheating scheme.

Marked in the figure:

1-water heater body, 2-circulation pump, 3-combining three-way valve, 4-diverting three-way valve, 5-first one-way valve, 6-bypass branch, 7-water inlet connector, 8-water outlet connector, 9-Heat exchange device, 10-Inner water inlet pipeline, 11-Inner water outlet pipeline, 12-Hot water pipeline, 13-Cold water pipeline, 14-Water water equipment, 15-Water mixing valve, 16-Second one-way Valve, 17-bypass branch, 18-return water connector, 19-third one-way valve, 20-return water three-way valve, 21-return water pipeline, 30-one-way valve.

Detailed ways

Example 1

In this embodiment, the water heater is a gas water heater. Those skilled in the art can predict that the pipeline structure of the present utility model is also suitable for other types of water heaters, such as electric water heaters. Arrows in the drawings indicate the direction of water flow.

As shown in Figure 1, a zero-cold water water heater of the utility model includes a water heater body 1, a circulation pump 2, a diversion three-way valve 3, a confluence three-way valve 4, a first one-way valve 5, a water inlet joint 7, and a water outlet joint 8. Heat exchanger 9 , internal water inlet pipeline 10 and internal water outlet pipeline 11 . The internal water inlet pipeline 10 communicates with the water inlet joint 7 , and the internal water outlet pipeline 11 communicates with the water outlet joint 8 . The circulating pump 2 is installed on the internal water inlet pipeline 10 of the water heater body 1 , and the water outlet direction of the circulating pump 2 in the operating state is consistent with the water flow direction of the internal water inlet pipeline 10 . A diversion three-way valve 3 is connected to the water inlet of the circulation pump 2 , and a confluence three-way valve 4 is connected to the water outlet of the circulation pump 1 . The parallel pipeline 6 is connected with the diversion three-way valve 3 and the confluence three-way valve 4 , and the first one-way valve 5 is arranged on the parallel pipeline 6 . The first one-way valve 5 can make the water flow from the water inlet end of the circulation pump 2 to the water outlet end of the circulation pump 2, forming a parallel flow distribution structure between the circulation pump 2 and the first one-way valve 5 . The circulation pump 2 and the parallel pipeline 6 are arranged inside the water heater body 1, so that the water heater itself has a zero cold water function integrated without external equipment.

As shown in Figure 2, during installation, the water equipment 14 communicates with the water outlet port of the water mixing valve 15, the water outlet joint 8 communicates with the hot water interface of the water mixing valve 15 through the hot water pipeline 12, and the water inlet joint 7 communicates with the water outlet port of the water mixing valve 15 through the cold water pipe Road 13 communicates with the cold water interface of water mixing valve 15 . A second one-way valve 16 is set near the water mixing valve 15 to communicate with the hot water pipeline 12 and the cold water pipeline 13, and the conduction direction of the second one-way valve 16 is consistent with the flow of water from the hot water pipeline 12 The direction of flowing to the cold water pipeline 13 is consistent.

As shown in FIG. 2 , the water heater is in an open circuit water supply state, at this time, the hot water end of the water mixing valve 15 is opened, and the water equipment 14 is using water. At this time, the circulation pump 2 is not running, and the tap water flows into the water heater body 1 from the water inlet joint 7, and is divided into two streams at the diversion three-way valve 4, respectively flowing to the circulation pump 2 and the parallel pipeline 6, the first one-way valve 5 Conduction under hydraulic action. The two streams of water flowing through the circulation pump 2 and the parallel pipeline 6 converge again at the confluence three-way valve 3, and then flow into the internal water inlet pipeline 10, and after being heated by the heat exchanger 9, pass through the internal water outlet pipeline 11 and the water outlet joint 8 Flow to hot water pipeline 12. Due to the existence of the second one-way valve 16 , tap water will not flow into the hot water pipeline 12 through the cold water pipeline 13 . The two-pipe scheme of the zero-cold water heater adopts a parallel waterway structure, and the water flow through the open circuit of the water heater is larger, which can overcome the influence of the insufficient diameter of the circulation pump 2.

As shown in FIG. 3 , the water heater is in the closed-circuit preheating state, and at this moment, the hot and cold water ends of the water mixing valve 15 are closed simultaneously, and the water-using equipment 14 does not emit water. The circulating pump 2 runs and drives the circulation of the water stored in the pipeline, that is, the stored water in the hot water pipeline 12 enters the interior of the water heater body 1 through the second check valve 16, the cold water pipeline 13 and the water inlet joint 7 under the action of the circulating pump 2 The water inlet pipeline 10 flows back to the hot water pipeline 12 through the internal water outlet pipeline 11 and the water outlet joint 8 after being heated by the heat exchanger 9 to complete the heating of the water stored in the hot water pipeline 12 . Due to the operation of the circulation pump 2, a relative negative pressure is formed at the water inlet end of the circulation pump 2, and a relative positive pressure is formed at the water outlet end of the circulation pump 2. 5, the conduction direction is opposite, so it can prevent the stored water in the internal water inlet pipeline 10 from flowing back to the water inlet end of the circulation pump 2 via the parallel pipeline 6 in reverse.

Example 2

The basic structure of the water heater in Embodiment 2 is the same as that in Embodiment 1, except that the water inlet pipeline is changed.

As shown in Figure 4, a return water joint 18 is provided outside the water heater body 1, and a bypass branch 17 is provided on the water inlet pipeline of the circulation pump 2 to communicate with the return water joint 18, and the bypass branch 17 A third one-way valve 19 is provided on the top, and the conduction direction of the third one-way valve 19 is consistent with the direction of water flow from the water return joint 18 to the water inlet end of the circulation pump 2 .

As shown in Figure 5, during installation, a return water three-way valve 20 is provided near the hot water pipeline 12 near the water use equipment 14, and the return water three-way valve 20 and the return water joint 18 are communicated through the return water pipeline 21 . Therefore, the stored water in the hot water pipeline 12 can flow back to the water heater body 1 for reheating through the return water three-way valve 20, the return water pipeline 21, the return water joint 18 and the bypass branch 17.

As shown in FIG. 5 , the water heater is in an open-circuit water supply state. At this time, the hot water end of the water mixing valve 15 is opened, and the water-using equipment 14 is using water. Circulation pump 2 is not running, tap water flows into water heater body 1 from water inlet joint 7, and is divided into two streams at the diversion three-way valve 4, respectively flowing to circulation pump 2 and parallel pipeline 6, and the first one-way valve 5 Conduction under action. The two streams of water flowing through the circulation pump 2 and the parallel pipeline 6 converge again at the confluence three-way valve 3, and then flow into the internal water inlet pipeline 10, and after being heated by the heat exchanger 9, pass through the internal water outlet pipeline 11 and the water outlet joint 8 Flow to hot water pipeline 12. Since the water flow direction is opposite to the conduction direction of the third one-way valve 19 , tap water can be prevented from flowing into the return water pipeline 21 through the bypass branch 17 .

As shown in Figure 6, the water heater is in a closed-circuit preheating state, and the circulation pump 2 is running to drive the pipeline water to circulate and flow, forming a relative negative pressure at the water inlet end of the circulation pump 2, and forming a relative negative pressure at the water return joint 18. Positive pressure can make the third one-way valve 19 conduct under the action of hydraulic power, and the water stored in the hot water pipeline 12 can pass through the return water three-way valve 20, the return water pipeline 21, the return water joint 7 and the The bypass branch 17 enters the internal water inlet pipe 10 of the water heater body 1, and after being heated by the heat exchanger 9, it flows back to the hot water pipeline 12 through the internal water outlet pipeline 11 and the water outlet joint 8 to complete the heating of the hot water pipeline 12. Heating of stored water. At this time, due to the operation of the circulation pump 2, the first non-return valve 5 is not conducted, and its principle is the same as that in Embodiment 1.

The specific implementation described above has described the technical solutions and beneficial effects of the utility model in detail. It should be understood that the above description is only the most preferred embodiment of the utility model, and is not intended to limit the utility model. Any modification, supplement and equivalent replacement made within the principle scope of the utility model shall be included in the protection scope of the utility model.

Claims (7)

1. A zero-cold water water heater, comprising a body, a heat exchange device installed in the body, an internal water inlet pipeline with a water inlet joint and an internal water outlet pipeline with a water outlet joint, characterized in that, in the A circulation pump is arranged on the internal water inlet pipeline, and the water outlet direction of the circulation pump is consistent with the water flow direction of the internal water inlet pipeline. A first one-way valve is arranged on the pipeline, and the first one-way valve can make water flow from the water inlet end of the circulation pump to the water outlet end of the circulation pump. 2. The zero cold water water heater according to claim 1, characterized in that, a diversion three-way valve is provided at the water inlet end of the circulation pump, and a confluence three-way valve is provided at the water outlet end of the circulation pump. 3. The zero cold water water heater according to claim 2, characterized in that, the circulation pump and the parallel pipeline are arranged inside the body. 4. The zero cold water water heater according to claim 3, characterized in that, the internal water outlet pipeline communicates with the hot water pipeline provided outside the body, and the internal water inlet pipeline communicates with the hot water pipeline provided outside the body The external cold water pipeline is connected, and the hot water pipeline is connected with the cold water pipeline through a second one-way valve, and the conduction direction of the second one-way valve is the same as the water flow from the hot water pipeline to the cold water pipeline. in the same direction. 5. The zero-cold water water heater according to claim 3, characterized in that, the internal outlet pipeline communicates with the hot water pipeline provided outside the body, and a bypass is provided on the water inlet pipeline of the circulation pump branch, the bypass branch communicates with the hot water pipeline through the return pipe arranged outside the body, and a third one-way valve is arranged on the bypass branch, and the third one-way valve The direction of conduction is consistent with the direction of water flow from the return pipe to the bypass branch. 6. The zero cold water water heater according to claim 5, characterized in that, the bypass branch is arranged inside the body. 7. The zero-cold water water heater according to claim 6, wherein the bypass branch is provided with a water return joint, and the water return joint is arranged outside the body.