CN110806023A

CN110806023A - Solar water heater

Info

Publication number: CN110806023A
Application number: CN201810881314.5A
Authority: CN
Inventors: 赵怀方
Original assignee: Chongqing Kangnaibao Technology Co Ltd
Current assignee: Chongqing Kangnaibao Technology Co Ltd
Priority date: 2018-08-05
Filing date: 2018-08-05
Publication date: 2020-02-18

Abstract

The invention discloses a gas-assisted heating solar water heater, which can also be called as a solar gas water heater, and comprises a solar heat collecting plate, a water tank and a controller, wherein a circular cavity is arranged inside the bottom of the water tank, a gas heating coil is arranged in the circular cavity, water entering the water tank enters the water tank after passing through a flow meter, and water leaving the water tank enters the gas heating coil through a water outlet pipe and finally flows out of a water outlet. The solar water heater can utilize solar energy to the maximum extent, starts gas heating when the heating temperature of the solar energy cannot be reached, can provide uninterrupted hot water at any time, has high heat efficiency, and is an ideal environment-friendly energy-saving product.

Description

Solar water heater

Technical Field

The invention relates to a water heater, in particular to a gas-assisted heating solar water heater.

Background

The solar water heater on the market at present is usually provided with an auxiliary heating device which is electrically heated, because the water in the water tank does not reach the specified temperature under the condition of no sun or insufficient sun irradiation in rainy days, and at the moment, the water is heated to the usable temperature by adopting the electric heating. The electric heating has the problems that 1, the energy consumption is high, and the cost of the electric heating is 3 times that of the gas heating compared with the gas heating; 2. the power is small, when the electric heating device is used, the power needs to be started in advance, the power of electric heating is generally 2-3kw and exceeds 3kw, the load of household circuits cannot be met by the aid of household air conditioners and other electric appliances, and the load of common gas heating can generally reach about 20 kw. Therefore, one or two hours are needed for heating one tank of water by adopting electric heating, and when people want to use hot water, the electric heating needs to be started in advance. 3. We need to pay attention to it at any time and are difficult to make automatic. For example, when a person in a house needs to take a bath, the person firstly sees that the temperature of solar heating is insufficient, and then starts electric heating immediately, and can take a bath after the temperature is reached after more than one hour. The reason why it cannot be done is that the system does not know when you will take a bath, if it switches to electrical heating at regular times, such as at 5 pm if the solar heating temperature is not reached, but does not waste electricity if you don't go. In addition, if someone bathes the fabric in the noon, the fabric cannot be made automatic. 4. The electric heating is easy to form scales on the heating pipe, so that the water tank is changed to be dirty. Moreover, the scaling causes deterioration of heat transfer efficiency and finally causes damage to the heating tube. 5. No matter the solar energy or the solar energy heated by electricity is used up, the hot water is not used up. The electric heating needs a period of time to be available with hot water.

Disclosure of Invention

The invention aims to solve the technical problem of providing a gas-assisted heating solar water heater, namely a solar gas water heater. The solar water heater mainly utilizes solar energy and adopts gas for auxiliary heating, and the gas heating power is high, so that the solar water heater can provide uninterrupted hot water at any time, and hot water is available at any time.

The solar water heater comprises a solar heat collecting plate 1, a water tank 4 and a controller 10, wherein a circular cavity 41 is arranged inside the lower part of the water tank 4, a fuel gas heating coil 411 is arranged in the circular cavity 41, and a water inlet pipe 44, a water outlet pipe 43 and a temperature sensing probe 42 are also arranged on the water tank 4;

a fire grate 7 is arranged below the gas heating coil, a gas proportional valve component 71 is arranged on the fire grate 7, and a gas inlet pipe 72 is connected to the proportional valve component;

an exhaust fan 8 is arranged on the lower side of the circular cavity 41. The outlet of the exhaust fan 8 is connected to the exhaust pipe 9, and the inlet of the exhaust fan is connected to the circular cavity 41;

the inlet of the gas heating coil 411 is connected with the water outlet pipe 43 of the water tank 4, the inlet of the water outlet pipe 43 is positioned at the top of the water tank, the outlet of the gas heating coil 411 is connected to the hot water outlet pipe 11, and the hot water outlet pipe 11 is provided with a temperature sensing probe 5.

A flow meter 6 is also arranged on the water inlet pipe 44 of the water tank 4.

The water tank 4 is also provided with a solar cold water interface and a solar hot water interface. The solar heat collecting plate 1 is connected to a solar cold water interface and a solar hot water interface on the water tank through a cold water pipe 2 and a hot water pipe 3.

The controller 10 is electrically connected with the fan 8, the fuel gas proportional valve 71, the temperature sensing probe 5, the temperature sensing probe 42 and the flowmeter 6.

The invention has the beneficial effects that: the solar heating can be fully utilized, and when the solar heating cannot reach the set temperature, if external water is used, the fuel gas heating is started. It can provide hot water at any time, need not wait for, simultaneously, because the gas burns in the inside heating coil of water tank, and the waste gas that the burning produced can heat the water tank cavity, so the gas heating's is efficient, and calorific loss is little. It can be directly connected to a pressure pipeline, so that the water outlet flow is large, and the use is more comfortable. It can be installed on balcony, roof and floor.

Drawings

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

FIG. 1 is a schematic diagram of the structural principle of the present invention;

FIG. 2 is a schematic illustration of modes of

operation

1, 2, 3, 4 of the present invention;

FIG. 3 is a schematic view of the gas-heated exhaust system of the present invention.

Detailed Description

Referring to fig. 1, the solar water heater of the present invention comprises a solar heat collecting plate 1, a water tank 4 and a controller 10, wherein a circular cavity 41 is arranged inside the lower portion of the water tank 4, a gas heating coil 411 is arranged inside the circular cavity 41, and the water tank 4 is further provided with a water inlet pipe 44, a water outlet pipe 43 and a temperature sensing probe 42.

A fire grate 7 is arranged below the gas heating coil, a gas proportional valve component 71 is arranged on the fire grate 7, and a gas inlet pipe 72 is connected to the proportional valve component.

An exhaust fan 8 is arranged on the lower side of the circular cavity 41. The outlet of the exhaust fan 8 is connected to the exhaust pipe 9 and the inlet of the exhaust fan is connected to the circular cavity 41.

A flow meter 6 is also arranged on the water inlet pipe 44 of the water tank 4.

The invention has the following operation modes: mode 1, solar heating mode. The solar heat collecting plate is arranged at a position lower than the water tank (a circulating water pump can be avoided, and the solar heat collecting plate can also be arranged at a high position and can be used for timing circulation by using the water pump), after the water is heated by the solar energy, the hot water can automatically rise, and the direction of water flow is shown in figure 2. Hot water flows into the water tank through the hot water pipe 3, and cold water in the water tank flows into the inlet of the solar heat collecting plate through the cold water pipe 2. Thus, the solar energy can heat the water in the water tank.

Mode 2, water use mode when the temperature of the water in the water tank is higher than the set temperature. As shown in fig. 2, the controller 10 detects the temperature of the water tank through the temperature sensing probe 42, and when the controller detects the external water through the flow meter 6, if the temperature of the water in the water tank is higher than the set temperature, the system enters the mode 2, and the water flow direction of the mode 2 is shown in fig. 2. Cold water enters the bottom of the water tank through the water inlet pipe 44, hot water flows into the gas heating coil 411 from the water outlet pipe on the upper portion of the water tank, gas heating cannot be started, hot water flows to a water using point through the water outlet pipe 11, the water temperature is required to be adjusted through the water mixing valve at the water using point, and the required use temperature is achieved.

Mode 3, the water use mode when the temperature of water in the water tank is less than the set temperature but is close with the set temperature relatively, the rivers direction is the same with mode 2, start gas heating, because the temperature of water tank is close with the set temperature, gas heating probably stalls, and at this moment the system can increase the temperature that gas heated the play water automatically, avoids gas heating stall. At this time, the output temperature of the water heater is higher than the set temperature, and the temperature of the water heater needs to be manually adjusted through a water mixing valve at a water using point.

Mode 4, the water use mode when the temperature of water in the water tank is less than the set temperature but with set temperature difference big, the rivers direction is the same with mode 2, starts gas heating, and gas heating can not put out a fire, and the output temperature of this moment water heater can keep at the set temperature, need not pass through at the water point and mix the manual temperature regulation of water valve.

In the above-mentioned

modes

3 and 4, when the gas heating is started, the exhaust fan is started, the direction of the air flow is as shown in fig. 3, the gas enters the proportional valve assembly 71 through the gas pipe 72, mixes with the air entering from below the fire grate 7 and then burns in the heating coil 411, and the burnt exhaust gas passes through the heating coil, passes through the cavity between the cavity 41 and the heating coil 411, flows into the exhaust fan 8, and then is discharged from the exhaust pipe 9.

The above description is only a preferred embodiment of the present invention, and the technical solutions that achieve the objects of the present invention by basically the same means are all within the protection scope of the present invention.

Claims

1. The utility model provides a solar water heater, includes solar panel 1, water tank 4 and controller 10, and solar panel passes through cold water pipe and hot-water line to be connected its characterized in that with water tank 4: the inside circular cavity 41 that is provided with in below of water tank 4, be provided with heating coil 411 in the circular cavity 41, the below of gas heating coil is provided with fire row 7, be provided with gas proportional valve subassembly 71 on the fire row 7, gas pipe 72 is connected to on the proportional valve subassembly 71, the downside side of circular cavity 41 is provided with exhaust fan 8, the import of gas heating coil is connected with water tank outlet pipe 43, the exit linkage of gas heating coil is to hot water outlet pipe 11, be provided with temperature sensing probe 5 on the hot water outlet pipe 11, be provided with flowmeter 6 on the inlet tube 44 of water tank 4.

2. The solar water heater according to claim 1, wherein: the air inlet of the exhaust fan 8 is communicated with the circular cavity 41, and the other part of the boundary of the circular cavity and the water tank 4 is sealed.

3. The solar water heater according to claim 1, wherein: the controller 10 is electrically connected with the fan 8, the fuel gas proportional valve 71, the temperature sensing probe 5, the temperature sensing probe 42 and the flowmeter 6.