CN201233103Y - Preheater for water heater - Google Patents

Abstract

The utility model discloses a water heater preheating device, which is connected with circulating water pipelines and domestic water pipelines. A temperature probe and a controller, the circulating water pump is equipped with an automatic exhaust device, the water flow sensor and the temperature sensing probe are respectively arranged on the periphery of the connecting pipe and connected with the controller. The preheating device of the utility model is used in conjunction with the water heater main unit, which is safe and reliable, and can maintain the water in the system pipeline at a certain temperature range. Even in cold winter, at any time, the user can use it as long as the water valve is turned on. Hot water at a comfortable temperature, without waiting, has good promotional value.

Description

Water heater preheating device

technical field

The utility model relates to the technical field of water heaters, in particular to a preheating device in a water circulation pipeline of the water heater.

Background technique

At present, water heaters (such as water heaters above 16 liters) appearing on the market can realize multi-point water supply, and there can be 2, 3 or even more water points. The external piping system is more complicated and there are many waterways. When the water heater is not working, the water in the external pipelines is cold water. In use, the cold water in these pipelines must be drained before hot water can be obtained. This process generally takes more than ten seconds. Therefore, there are two problems in the use of multi-point water supply for water heaters: one, the waste of water, gas and electricity; the cold water in the pipeline generally cannot be used for bathing, and is generally discharged directly, resulting in waste of water resources; The road is long, and all the hot water stays in the pipeline, and the hot water will be cooled slowly in the natural state, and will be discharged before the next use. Therefore, the hot water is wasted, and the water is wasted , electric or gas. Second, it is inconvenient; because the discharge of cold water in the pipeline generally takes more than ten seconds, it needs a long wait in use, and it is uncomfortable and convenient to use.

Contents of the invention

The purpose of the utility model is to provide a water heater preheating device which is not only simple in structure, safe and stable, but also easy to use and control in order to solve the deficiencies of the prior art.

The utility model adopts the following technical solutions to achieve the above object: a water heater preheating device, which is connected with the circulating water pipeline and the domestic water pipeline, is characterized in that it includes a casing and a connecting pipe arranged inside it, a circulation A water pump, a pressure storage device, a water flow sensor, a temperature-sensing probe and a controller. The circulating water pump is equipped with an automatic exhaust device. The water-flow sensor and the temperature-sensing probe are respectively arranged on the periphery of the connecting pipe and connected with the controller.

As a further description of the above solution, the water flow sensor and the temperature sensing probe are respectively installed on the connecting pipe, and the connecting pipe is connected to the water pump.

The housing is provided with a water inlet joint and a water return joint. One end of the two joints is connected to a connecting pipe inside the housing, and the other end is respectively connected to a domestic water pipeline and a circulating water pipeline.

A three-way body is connected between the water inlet joint and the return water joint, and the three-way body contains two one-way valves, which combine the circulating return water and the domestic water supply together.

The pressure storage device adopts an expansion tank, and the input end of the expansion tank is connected with the return water joint through a connecting pipe.

The side of the water return joint is provided with a cleaning plug, and the water inlet joint is equipped with a water volume regulating device.

The beneficial effect that the utility model can reach by adopting above-mentioned technical solution is:

1. The utility model adopts main components such as circulating water pump, expansion tank, water flow sensor, temperature sensing probe and controller, plus connecting pipe, three-way body, water inlet joint, and return water joint to form an organic whole together. Used as a set, it is installed between the water pipeline and the water inlet pipeline to circulate the water in the system pipeline, start the water heater, and heat the water in the pipeline, thereby maintaining the water in the system pipeline at a certain temperature range. Realize instant maintenance of water temperature and 24-hour preheating throughout the day, so that the water temperature in the hot water supply pipe can be maintained at a certain temperature, so that hot water can be available immediately after turning on, and avoid the need to empty cold water.

2. The circulating water pump of this utility model is equipped with an automatic exhaust device, which can automatically discharge the air in the pipeline during the trial operation and preheating process of the system, so as to prevent resonance caused by air and water pump idling.

Description of drawings

Fig. 1 is a schematic diagram of the internal structure of the preheating device of the present invention;

Fig. 2 is the structural representation of preheating device of the present utility model;

Fig. 3 is a side view structural schematic diagram of Fig. 2;

Figure 4 is a schematic diagram of the structure of the three-way body.

Description of reference signs: 1, housing 2, connecting pipe 3, circulating water pump 4, pressure storage device 5, water flow sensor 6, temperature sensing probe 7, controller 8, automatic exhaust device 9, return water joint 10, water inlet Joint 11, three-way body 12, one-way valve 13, cleaning plug 14, water volume adjustment device

Detailed ways

As shown in Figures 1 to 4, the water heater preheating device of the present utility model is connected with the circulating water pipeline and the domestic water pipeline, and it includes a casing 1 and a connecting pipe 2 arranged inside it, a circulating water pump 3, and a pressure storage device 4. The water flow sensor 5, the temperature sensing probe 6 and the controller 7, the controller 7 is connected to the control system of the main engine of the water heater; in this embodiment, the pressure storage device adopts an expansion tank to maintain the water pressure in the system pipeline within a certain range . Among them, the circulating water pump 3 is the core component of the preheating device, which provides circulating power. The circulating water pump 3 is equipped with an automatic exhaust device 8, which automatically discharges the air in the pipeline during the trial operation and preheating of the system to prevent air from being generated. Resonance, to prevent the water pump from being stuck and idling, the water flow sensor 5 and the temperature sensing probe 6 are respectively arranged on the periphery of the connecting pipe 2 and connected to the controller 7, which feeds back the water flow signal and the temperature signal of the system water to the controller of the preheating device 7, the controller 7 feeds back to the control system of the water heater host as the basis for judging the work of the central hot water system. The shell 1 is provided with a return water joint 9 and a water inlet joint 10, the two joints are respectively connected to the circulating water pipeline and the domestic water pipeline, the input end of the expansion tank is connected to the return water joint 9 through the connecting pipe 2, and the return water joint 9 A cleaning plug 13 is provided on the side of the water inlet joint 10, and a water volume regulating device 14 is installed on the water inlet joint 10. A three-way body 11 is connected between the water inlet joint 10 and the return water joint 9 to combine the circulating return water and the domestic water supply together. The three-way body 11 contains two one-way valves 12 to ensure that the circulating water cannot enter the water supply pipe, and the domestic water supply Cannot reverse into the circulation line.

In terms of control, the preheating device and the main engine of the water heater are a unified whole. The preheating device collects the temperature and water flow signals of the system water, and feeds the signals back to the control system of the main engine. Whether the thermal device operates.

When in use, use the preheating device together with the main unit of the water heater to circulate the water in the system pipeline, start the water heater, the system water is heated, the temperature rises, the volume expands, part of the water enters the expansion tank, and the water pressure of the system is relieved , to avoid excessive water pressure, prevent the system pipeline, water heater and preheating device from being damaged, when the system water temperature drops and the pressure decreases, the water in the expansion tank is squeezed back into the pipeline to maintain the system pipeline The water pressure in the pipeline; when the water in the system pipeline reaches the required set temperature, the preheating device will stop running, and the water heater will stop heating, so the water in the system pipeline will maintain a certain temperature range, even in cold In winter, warm water can be used as long as the water valve is turned on at any time.

Claims (6)

1. A preheating device for a water heater, which is connected to a circulating water pipeline and a domestic water pipeline, and is characterized in that it includes a shell and a connecting pipe arranged inside it, a circulating water pump, a pressure storage device, a water flow sensor, and a temperature sensing probe As well as the controller, the circulating water pump is equipped with an automatic exhaust device, and the water flow sensor and the temperature sensing probe are respectively arranged on the periphery of the connecting pipe and connected with the controller. 2. The water heater preheating device according to claim 1, wherein the water flow sensor and the temperature sensing probe are respectively installed on a connecting pipe connected to the water pump. 3. The water heater preheating device according to claim 1 or 2, characterized in that: the housing is provided with a water inlet joint and a water return joint, one end of the two joints is connected to the connecting pipe inside the housing, and the other end is respectively Connect the domestic water pipeline and the circulating water pipeline. 4. The water heater preheating device according to claim 3, characterized in that: a tee body is connected between the water inlet joint and the return water joint, and the tee body contains two one-way valves for converging the circulating return water and the domestic water supply. Water supply all the way. 5. The water heater preheating device according to claim 3, wherein the pressure storage device is an expansion tank, and the input end of the expansion tank is connected to the return water joint through a connecting pipe. 6. The water heater preheating device according to claim 3, characterized in that: a cleaning plug is provided on the side of the return water joint, and a water volume adjustment device is installed on the water inlet joint.

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