CN103940114A - Heat collection and storage type unpowered solar water heater and hot water system - Google Patents

Abstract

A heat-collecting and heat-storing non-powered circulating solar water heater and hot water system, including an all-glass solar heat-collecting vacuum tube and an outer box body, the inside of the outer box body is filled with heat medium, and the outer box body The first layer is provided with a thermal insulation shell, and the outer box body is connected with an air release pipe between the thermal insulation shells; the all-glass solar heat collection vacuum tube is plugged into the lower side wall of the outer box body; the rear side of the all-glass solar heat collection vacuum tube is provided with a bracket , the inside of the outer box is provided with an inner box, and the left and right sides of the inner box are respectively connected with a cold water inlet pipe and a hot water outlet pipe. A heating device, a thermostatic water mixing valve is connected between the cold water inlet pipe and the hot water outlet pipe at the heat supply end. It can solve a series of problems such as the traditional solar thermal collector circulation pump power consumption and heat storage system occupying too much building space, low solar thermal utilization efficiency, complex management, high cost, unbalanced cold and hot water pressure, and poor water quality.

Description

Heat collection, heat storage type passive solar water heater and hot water system

technical field

The invention relates to a solar hot water supply system, in particular to a non-powered solar hot water supply system.

Background technique

With the development of society, energy shortage and environmental pollution have become the bottleneck restricting sustainable development, and the application of renewable energy has been paid more and more attention. As a relatively economical and relatively mature technology, solar water heating has been applied on a large scale. In particular, the popularization and application of household water heaters account for about 90% of solar thermal utilization; solar centralized hot water systems account for about 10%. According to the investigation and research on the current solar water heating technology, the following disadvantages generally exist:

1. In low-rise residences, compact water heaters with top water and sun drying are generally used, which have problems of low thermal efficiency, poor water quality, easy scaling and unstable water pressure, and cannot meet the requirements of hygienic standards and hot water comfort.

2. The split-type solar water heating system requires hot water circulating pumps, heat storage tanks and other facilities, which are expensive, difficult to install, and expensive to operate and maintain.

3. The traditional centralized solar water heating system needs to occupy the hot water machine room, the overall cost is high, accidents such as pipe bursts and freezing cracks occur frequently during operation, maintenance and management are difficult, and operating costs are high. At the same time, due to the high heat consumption of the water pipe network in the centralized solar water heating system, the comprehensive heat utilization efficiency is low. The power circulation of the circulating pump not only consumes electric energy, but also makes the collector operate under pressure, and the vacuum tube collector is easy to burst; the flat plate collector is used in the northern region, and antifreeze is required in cold regions, and the overall operating cost is relatively high.

To sum up, there are many problems in the solar domestic hot water system at present, the users are not satisfied, and the developers do everything possible to avoid the installation of the solar hot water system. Improve the problems that occur in current solar energy applications.

Contents of the invention

In order to solve the above problems, the present invention proposes a heat collection and heat storage type unpowered solar water heater and hot water system, which can solve the problem of traditional solar heat collection circulation pump power consumption and heat storage system occupying too much building space and solar heat utilization. A series of problems such as low efficiency, complicated management, high cost, unbalanced pressure of cold and hot water, and poor water quality.

To achieve the above object, the present invention adopts the following technical solutions:

A heat-collecting and heat-storing non-powered circulating solar water heater, including an all-glass solar heat-collecting vacuum tube for heat collection and an outer box for heat conduction, characterized in that: the outer box is filled with There is a heat medium for heat conduction, and the all-glass solar heat collection vacuum tube is vertically inserted into the lower side wall of the outer box; the inner box of the outer box is provided with an inner box for storing hot water , the left and right sides of the inner box body are respectively connected with a cold water inlet pipe and a hot water outlet pipe for domestic hot water.

The outer layer of the outer box body is provided with a thermal insulation shell to prevent heat loss, and the outer box body is connected with a vent pipe for preventing bursting between the thermal insulation shells.

The all-glass solar heat collection vacuum tubes are arranged in parallel, and a solar heat collector support is arranged on the rear side thereof.

The all-glass vacuum tube is a double glass vacuum tube with a diameter of preferably 47mm-58mm. The length is preferably 1800mm-2100mm.

The inner box body is a stainless steel box body or a copper box body with good thermal conductivity.

The hydraulic loss from the cold water inlet pipe to the hot water outlet pipe is ≤0.001MPa, the output flow of a single module is ≥0.15L/S, and the pressure is ≥1.0MPa.

A heat-collecting and heat-storing non-powered circulating solar water heating system, including an all-glass solar heat-collecting vacuum tube for heat collection and an outer box for heat conduction, characterized in that: the inside of the outer box Filled with a heat medium for heat conduction, the outer layer of the outer box body is provided with a thermal insulation shell to prevent heat loss, and the outer box body is communicated with a vent pipe for preventing bursting between the thermal insulation shells; The all-glass solar heat-collecting vacuum tubes are vertically plugged into the lower side wall of the outer box body; the all-glass solar heat-collecting vacuum tubes are arranged in parallel, and the rear side is provided with a solar collector bracket, and the outer box The inside of the body is provided with an inner box for storing hot water. The left and right sides of the inner box are respectively connected with a cold water inlet pipe and a hot water outlet pipe for domestic hot water. The hot water outlet pipe leads to each household. The pipeline at the heat supply end is connected with an auxiliary heating device, and a thermostatic water mixing valve is connected between the cold water inlet pipe and the hot water outlet pipe at the heat supply end.

This kind of heat collection and heat storage type non-powered circulation solar collector and hot water system integrates solar heat collection, heat storage and heat exchange. The supporting box is composed of "inner box" and "outer box". Inside the "inner box" is heated domestic hot water, which is in a closed state and can bear pressure; between the "inner box" and the "outer box" is solar hot water as a heat medium, which is in an open state and is not under pressure; Solar heat collection relies on natural circulation and heat conduction, and does not require additional power. The supporting box can store the daily average heat collected by the total area of the heat collector. the

The present invention utilizes the currently mature and economical all-glass vacuum tube heat collector, which is compactly installed with the hot water tank; Ordinary tap water can also be a special medium, which uses the temperature difference of water to collect and store the heat collected by solar energy. It is an open system, the structure is not under pressure, and the vacuum glass tube is stable and reliable, which avoids the problems of vacuum tube explosion, resistance imbalance, and heat collection efficiency drop caused by the traditional heat collection system circulation pump running under pressure; the water in the vacuum tube is used as heat The water volume is relatively stable, so problems such as collector scaling are avoided; the "inner box" is heated domestic hot water, which operates under pressure; the solar vacuum tube collects heat during the day, and at the same time slowly heats the "inner box" through conduction Hot water, automatically complete heat exchange between heat medium and hot water; when hot water is needed, use the pressure of domestic cold water to push the hot water in the "inner box" into the hot water heating pipe network in turn, and the cold water and hot water are the same power source , can realize the pressure balance of cold and hot water, and can ensure the comfort of hot water.

The invention separates the auxiliary heating equipment from the solar heat storage equipment and independently sets them up, avoiding the mutual interference of different heat sources in the same space and affecting the efficiency of the solar heat collector. Set different auxiliary heating methods or water heaters on the hot water pipes at the end of the hot water system or behind the solar water heater according to engineering conditions; for small systems, traditional electric water heaters or gas water heaters can be used; for large systems, traditional heat sources can be used according to local conditions.

The invention effectively couples the advanced concept of building water supply and drainage design with solar engineering technology, realizes the integration of solar heat collection, heat exchange, and heat storage technologies, and significantly improves the utilization efficiency of solar heat; It saves energy consumption in operation; realizes continuous and closed conversion of cold water into hot water, ensures hygiene and safety, and meets various technical requirements such as pressure balance of cold and hot water.

The present invention is a complete set of comprehensive solar water heating device and hot water system, which integrates engineering design, solar heat collection, heat storage, heat exchange, auxiliary heating, cold water supply, hot water supply and other multi-level engineering technologies, The concept is ingenious and the operation is convenient. It follows the principle of the beginning of all things and the principle of simplicity. Its engineering design principle is simple. The use of water engineering provides a reliable technical guarantee and is conducive to large-scale promotion. It is suitable for household and centralized hot water systems in civil buildings, and also suitable for industrial and agricultural low-temperature hot water supply places.

Description of drawings

Fig. 1 is a schematic structural view of the heat collection and heat storage type non-power circulation solar water heater of the present invention.

Fig. 2 is a structural schematic diagram of the expansion module of the heat collection and heat storage type non-power circulation solar water heater of the present invention.

Fig. 3 is a schematic diagram of the working principle of the heat collection and storage type non-powered solar water heating system of the present invention.

Fig. 4 is a working principle block diagram of the present invention.

Reference signs: 1-insulation shell, 2-outer box body, 3-inner box body, 4-cold water inlet pipe, 5-hot water outlet pipe, 6-ventilation pipe, 7, all-glass solar heat collection vacuum tube, 8-solar heat collector bracket, 9-auxiliary heating device, 10-thermostatic mixing valve.

Detailed ways

The present invention will be further explained below in conjunction with the accompanying drawings and specific embodiments, as shown in Figures 1-4: this heat collection, heat storage type non-power circulation solar water heater includes an all-glass solar heat collection vacuum tube for heat collection (7) and the outer box body (2) for heat conduction, the outer box body (2) is filled with heat medium for heat conduction, and the all-glass solar heat collection vacuum tube (7) is inserted vertically Connected to the lower side wall of the outer box (2); it is characterized in that an inner box (3) for storing hot water is arranged inside the outer box (2), and the inner box Both sides of the box body (3) are respectively connected with a cold water inlet pipe (4) and a hot water outlet pipe (5) for domestic hot water. The outer layer of the outer box body (2) is provided with a thermal insulation shell (1) to prevent heat loss, and the outer box body (2) is connected with a vent pipe for preventing bursting between the thermal insulation shells (1) ( 6). The all-glass solar heat collection vacuum tubes (7) are arranged in parallel, and a solar heat collector support (8) is arranged on the outside thereof. The all-glass vacuum tube (7) is a double-glass vacuum tube. In this embodiment, the diameter is preferably 58 mm, and the length is preferably 2100 mm. In this embodiment, the inner box body (3) is preferably made of stainless steel with good thermal conductivity.

See Figure 3 for the embodiment of heat collection and heat storage on the roof without power cycle solar hot water system. The working process of the present invention: the all-glass solar vacuum tube collects 7 heat and stores it in the outer box body 2, and slowly heats the inner box body 3 of domestic water. The hydraulic loss of domestic water from the cold water inlet pipe (4) to the hot water outlet pipe (5) is ≤0.001MPa, the output flow of a single module is ≥0.15L/S, and the pressure is ≥1.0MPa. The auxiliary heating device (9) is an auxiliary heat source, and a self-contained boiler room can be used. In order to ensure that the domestic hot water temperature is ≤60°C, control the domestic hot water outlet temperature, and prevent scalding, a thermostatic mixing valve (10) is installed in the hot water pipe network. The present invention can be used by a single residential user, and is also suitable for a centralized hot water system for concentrated users. The present invention is a complete series of products, which can use basic modules to carry out multi-module horizontal expansion according to engineering characteristics, as shown in Figure 2, and can also be vertically and horizontally bidirectionally expanded, as shown in Figure 3.

Claims (7)

1. a thermal-arrest, heat-storage is unpowered circulating solar energy water heater, comprise the outer box body (2) conducting for the full-glass solar energy heat collecting vacuum pipe (7) of thermal-arrest and for heat, it is characterized in that: the inner filling of described outer box body (2) is useful on the heating agent of heat conduction, and described full-glass solar energy heat collecting vacuum pipe (7) is vertically plugged on the lower wall of described outer box body (2); The inside of described outer box body (2) is provided with the interior box body (3) for storing hot water, and the left and right sides of described interior box body (3) is connected with respectively turnover domestic hot-water's cold water inlet (4) and hot water outlet pipe (5).

2. thermal-arrest according to claim 1, heat-storage is unpowered circulating solar energy water heater, it is characterized in that: the skin of described outer box body (2) is provided with the lagging casing (1) that prevents heat loss, described outer box body (2) is communicated with the bleeder pipe (6) for preventing explosion between lagging casing (1).

3. thermal-arrest according to claim 2, heat-storage is unpowered circulating solar energy water heater, is characterized in that: between described full-glass solar energy heat collecting vacuum pipe (7), be arranged in parallel, its rear side is provided with solar thermal collector support (8).

4. thermal-arrest according to claim 3, heat-storage is unpowered circulating solar energy water heater, is characterized in that: described all-glass vacuum tube (7) is double-glass vacuum pipe, and diameter is preferably 47mm-58mm; Length is preferably 1800mm-2100mm.

5. thermal-arrest according to claim 3, heat-storage is unpowered circulating solar energy water heater, is characterized in that: described interior box body (3) is stainless steel casing or the copper casing with good heat conductive performance.

6. thermal-arrest according to claim 3, heat-storage is unpowered circulating solar energy water heater, is characterized in that: described cold water inlet (4) is to hot water outlet pipe (5) hydraulic loss≤0.001MPa, single module outflow >=0.15L/S, pressure-bearing >=1.0MPa.

7. a thermal-arrest, heat-storage is unpowered circulating solar energy hot-water heating system, comprise the outer box body (2) conducting for the full-glass solar energy heat collecting vacuum pipe (7) of thermal-arrest and for heat, it is characterized in that: the inner filling of described outer box body (2) is useful on the heating agent of heat conduction, the skin of described outer box body (2) is provided with the lagging casing (1) that prevents heat loss, and described outer box body (2) is communicated with the bleeder pipe (6) for preventing explosion between lagging casing (1), described full-glass solar energy heat collecting vacuum pipe (7) is vertically plugged on the lower wall of described outer box body (2), between described full-glass solar energy heat collecting vacuum pipe (7), be arranged in parallel, its rear side is provided with solar thermal collector support (8), the inside of described outer box body (2) is provided with the interior box body (3) for storing hot water, the left and right sides of described interior box body (3) is connected with respectively turnover domestic hot-water's cold water inlet (4) and hot water outlet pipe (5), hot water outlet pipe (5) is led in the pipeline of each family heat for end and is communicated with assisted heating device (9), described heat is for being connected constant-temperature water mixing valve (10) between the cold water inlet (4) of holding and hot water outlet pipe (5).