CN202947301U - Solar energy gas composite energy source hot water system - Google Patents

Abstract

The utility model relates to the field of water storage heaters, and discloses a solar gas composite energy hot water system, comprising: a solar heater, a gas water heater, a water tank, a central hot water circulation circuit and a control system; it is characterized in that the water tank It includes: a thermostatic tank directly connected to the central hot water circulation circuit, and a heat storage tank forming a solar circulation circuit with a solar heater; the first water outlet at the upper end of the thermostatic tank is connected to the water inlet of the gas water heater; A water inlet is connected to the water outlet of the gas water heater to form a heating cycle; the water outlet of the heat storage tank is connected to the second water inlet at the lower end of the thermostatic tank and the water inlet of the gas water heater through a three-way valve. Compared with the prior art, the utility model has the advantages of high utilization rate of solar energy and fast heating rate, and at the same time, it can obtain continuous large-flow constant-temperature water supply capability with relatively small heat output of gas heating equipment.

Description

A solar gas composite energy hot water system

technical field

The utility model relates to the field of water storage heaters, in particular to a solar gas composite energy hot water system.

Background technique

In recent years, as energy conservation and environmental protection put forward higher and higher requirements for household appliances, solar gas water heaters have gradually been favored by users. However, independent solar water heaters are greatly affected by the climate, and it is difficult to ensure sufficient hot water at all times. To this end, the industry has developed a multi-heat source hot water system that combines solar gas and gas.

For example, a Chinese patent with publication number CN2740949 discloses a multi-heat source (solar, gas, electricity) central gas water heater, as shown in Figure 1, including: solar heating device 01, gas heating device 02, constant temperature pump 03, temperature sensor 04 , temperature control system 05, the water inlet of the gas heating device 02 is connected with the water storage tank 06, and the water outlet is connected with the water storage tank 06 through a constant temperature pump 03 to form a circulation loop; the water inlet of the solar heating device is connected with the water storage tank 06 The tap water communicates, and the outlet is connected with the water storage tank 06; the temperature sensor is located in the water storage tank 06. Although this kind of gas composite energy hot water system with a single water tank and two kinds of heating equipment can combine solar energy and gas combustion heat energy, it mainly has the following two defects: 1) The solar cycle temperature difference is small and the heating efficiency is low; 2) The utilization rate of solar energy is low, and the temperature of the water storage tank is often kept at the set temperature due to the repeated heating of the gas appliance in the water storage tank. At this time, even if the starting conditions of the solar energy are met, the system will force the solar energy not to start. 3) The continuous large flow water supply capacity is low, because the heat heated by solar energy does not directly participate in the heat output. To obtain continuous large flow constant temperature water supply, it must be achieved by increasing the heating capacity of the gas water heater, so the output capacity is affected by the heating capacity of the gas water heater constraints.

In view of this, how to develop and design a new type of solar-gas composite energy hot water system that has a high utilization rate of solar energy and avoids the limitation of water flow by the heating capacity of gas water heaters is a new problem that plagues the development of the industry.

Contents of the invention

Aiming at the problems existing in the prior art, the utility model provides a new type of solar gas composite energy hot water system, which solves the problem of low utilization rate of solar energy in the solar gas composite energy hot water system, and alleviates the water flow of the solar gas composite energy hot water system Limited by the heating capacity of the gas water heater.

In order to achieve the above object, the utility model adopts the following technical solutions.

A solar gas composite energy hot water system, comprising: a solar heater, a gas water heater, a water tank, a central hot water circulation loop and a control system; it is characterized in that the water tank includes: a water tank directly connected to the central hot water circulation loop A thermostatic tank, a heat storage tank that forms a solar circulation loop with a solar heater; the connection between the thermostatic tank and the heat storage tank is as follows: the first water outlet on the upper end of the thermostatic tank is connected to the water inlet of the gas water heater, and the second water outlet on the upper end of the thermostatic tank A water inlet is connected to the water outlet of the gas water heater to form a heating cycle; the water outlet of the heat storage tank is connected to the second water inlet at the lower end of the thermostatic tank and the water inlet of the gas water heater through a three-way valve.

As an improvement, a first temperature sensor connected to a control system is provided in the thermostatic tank.

As an improvement, the heat storage tank is provided with a second temperature sensor connected to the control system.

As an improvement, the heating cycle is provided with a first pipeline pump connected to the control system; the first pipeline pump is located on the pipeline connecting the first water outlet of the thermostatic tank and the water inlet of the gas water heater.

As an improvement, the central hot water circulation system is provided with a second pipeline pump connected to the control system.

Compared with the existing multi-heat source hot water system, the solar gas composite energy hot water system provided by the utility model has the following beneficial effects:

1. The solar heater and gas water heater are designed separately, and the heat storage tank and the constant temperature tank are used to store heat separately, which can effectively improve the heat exchange temperature difference of solar energy, improve the heat exchange effect and the utilization rate of solar energy.

2. Use solar energy to heat the heat storage tank alone. The size of the heat storage tank is selected according to the guaranteed rate of the designed solar energy. As long as the system has water demand, the solar energy will have heat output, and the solar energy utilization rate is high.

3. Use the control system to intelligently select the direction of heat transfer in the heat storage tank, and the cold water is preheated by the heat storage tank before entering the constant temperature tank or gas water heater, achieving continuous output with a small gas water heater heat output Large flow constant temperature hot water.

Description of drawings

Figure 1 is a schematic diagram of the existing solar gas composite energy hot water system;

Figure 2 is a schematic diagram of the principle of Embodiment 1 of the solar gas composite energy hot water system provided by the utility model;

Fig. 3 is a schematic structural diagram of Embodiment 2 of the solar-gas composite energy hot water system provided by the utility model.

Explanation of reference signs:

01. Solar heating device 02. Gas heating device 03. Constant temperature pump 04. Temperature sensor 05. Temperature control system 06. Water storage tank

1. Solar heater 2. Gas water heater 3. Central hot water circulation circuit 4. Constant temperature tank 5. Heat storage tank 21. Water inlet 22. Water outlet 41. First water outlet 42. First water inlet 43. Second inlet Water outlet 44, first temperature sensor 51, water outlet 52, second temperature sensor 7, first pipeline pump 8, second pipeline pump.

Detailed ways

In order to further illustrate the essence of the utility model, the specific implementation of the utility model is described as follows in conjunction with the accompanying drawings.

Embodiment one

As shown in Figure 2, a solar gas composite energy hot water system includes: a solar heater 1, a gas water heater 2, a central hot water circulation loop 3, a thermostatic tank 4 directly connected to the central hot water circulation loop 3, and a solar The heater 1 forms the heat storage tank 5 of the solar circulation loop, and the control system.

Wherein, the first water outlet 41 of the thermostatic tank 4 is connected to the water inlet 21 of the gas water heater 2, and the first water inlet 42 of the thermostatic tank 4 is connected to the water outlet 22 of the gas water heater 2 to form a heating cycle. The water outlet 51 of the heat storage tank 5 is connected to the second water inlet 43 of the thermostatic tank and the water inlet 21 of the gas water heater through the three-way valve 6 .

In particular, in order to facilitate the control of the solar gas composite energy hot water system, the thermostatic tank 4 is provided with a first temperature sensor 44 connected to the control system, and the heat storage tank 5 is provided with a first temperature sensor 44 connected to the control system. Two temperature sensors 52, the first pipeline pump 7 connected with the control system is provided on the heating cycle; the first pipeline pump 7 is located on the pipeline connecting the first water inlet 42 of the thermostatic tank 4 and the water outlet 22 of the gas water heater , the central hot water circulation circuit 3 is provided with a second pipeline pump 8 connected to the control system.

The solar gas composite energy hot water system provided in this embodiment uses solar energy to heat the heat storage tank alone, and the size of the heat storage tank is selected according to the guaranteed rate of the designed solar energy. As long as the system has water demand, the solar energy will generate heat output, ensuring the efficient operation of solar energy. At the same time, due to the constant temperature hot water in the constant temperature tank, when there is a demand for water, the cold water flows in from the lower part of the solar heat storage tank, and the hot water in the solar heat storage tank enters the constant temperature tank through the three-way valve, and the control system detects the water temperature through the sensor. The water flow rate can automatically determine the opening and closing of the first pipeline pump and the three-way valve of the water pump, so as to ensure that the system has a large heat transfer capacity at any time. In addition, since the cold water is preheated by the solar heat storage tank before entering the constant temperature tank or gas water heater, the effect of continuous large flow constant temperature water supply can be achieved with a small heat output of the gas water heater.

Embodiment two

As shown in Figure 3, a solar gas composite energy hot water system includes: a solar heater 1, a gas water heater 2, a central hot water circulation loop 3, a thermostatic tank 4 directly connected to the central hot water circulation loop 3, and a solar The heater 1 forms the heat storage tank 5 of the solar circulation loop, and the control system.

The solar-gas composite energy hot water system provided in this embodiment is basically the same as the first embodiment, the only difference is that the thermostat tank 4 is superimposed on the heat storage tank 5, and the installation structure is compact and occupies a small space.

The above specific embodiments have described the essence of the utility model in detail, but the protection scope of the utility model cannot be limited by this. All simple improvements and modifications made according to the essence of the utility model all fall within the scope of protection of this patent. In addition, in the present utility model, the first, second and third are only relative definitions for the convenience of description, and are not used to limit the specific positions of the components.

Claims (5)

1. a solar gas compound energy hot-water heating system comprises: solar heater, gas heater, water pot, central hot water closed circuit and control system; It is characterized in that described water pot comprises: the thermostatic tank that directly links to each other with the central hot water closed circuit forms the heat storage can of solar energy closed circuit with solar heater; Described thermostatic tank is connected connected mode and is with heat storage can: the first delivery port of thermostatic tank upper end connects the water inlet of gas heater, and the first water inlet of this thermostatic tank upper end connects the delivery port of gas heater, forms the Heating Cyclic loop; The delivery port of described heat storage can connects the second water inlet of thermostatic tank lower end and the water inlet of gas heater by triple valve.

2. solar gas compound energy hot-water heating system according to claim 1 is characterized in that, is provided with the first temperature sensor that is connected with control system in the described thermostatic tank.

3. solar gas compound energy hot-water heating system according to claim 1 is characterized in that, is provided with the second temperature sensor that is connected with control system in the described heat storage can.

4. solar gas compound energy hot-water heating system according to claim 1 is characterized in that, described Heating Cyclic loop is provided with the first tubing pump that is connected with control system; This first tubing pump is positioned on the pipeline that connects thermostatic tank the first delivery port and gas heater water inlet.

5. solar gas compound energy hot-water heating system according to claim 1 is characterized in that, described central hot water circulation system is provided with the second pipe pump that is connected with control system.

Images