CN215176117U

CN215176117U - Solar water heater controller

Info

Publication number: CN215176117U
Application number: CN202120729783.2U
Authority: CN
Inventors: 陈星�; 鞠永健
Original assignee: Shanghai Sunyat Architecture Design Co ltd
Current assignee: Shanghai Sunyat Architecture Design Co ltd
Priority date: 2021-04-09
Filing date: 2021-04-09
Publication date: 2021-12-14
Anticipated expiration: 2031-04-09

Abstract

The utility model discloses a solar water heater controller, include: the single-chip microcomputer is used for closing the heating circuit to stop heating the water in the water storage tank and closing the water feeding electromagnetic valve to stop feeding water to the water storage tank when the water flow detection circuit detects that the water flow flows, and is used for closing the heating circuit to stop heating the water in the water storage tank and opening the water feeding electromagnetic valve to feed water to the water storage tank when the water flow detection circuit does not detect that the water flow flows and the water level is lower than a first liquid level. No matter under the condition that a user uses the solar water heater or the liquid level in the water storage tank is lower than the standard, the heating circuit is cut off, the heating of water is stopped, and the condition that the heater is overheated due to dry burning is avoided.

Description

Solar water heater controller

Technical Field

The utility model relates to a controller.

Background

At present, China strongly supports energy conservation and emission reduction, solar building integration and green buildings are gradually upgraded, other non-renewable energy sources are saved, and renewable energy sources are more efficiently utilized to become the development direction of new energy sources, so that the solar water heater gradually enters enterprises and families. However, the traditional solar water heater is seriously influenced by seasons and weather, particularly, the traditional solar water heater cannot be normally used all the year round due to continuous overcast and rainy days in the south of the river in winter, and therefore the solar water heater with the auxiliary electric heating function is produced. But the security problem that comes with is not a little worth, because supplementary electric heating device sets up in the solar energy water storage tank usually, can increase when the water storage tank sets up in the roof and connect the short pole and carry out the lightning protection, but the operating voltage of supplementary electric heating device 220V is greater than human safe voltage 36V far away in the heat storage water tank. Specifically, in the case where the amount of water is reduced, the auxiliary electric heating means (e.g., heater) may be dry-burned, and first, those portions which do not contact the water may be overheated, and if the time is long, the rod may be directly flown out by being separated from the electric wire. Even if the heater does not fly out, the plastic of the head is directly burned, so that the heater is damaged and cannot be used. Further, a human body may get electric shock due to the conductivity of water when the electric heating fails.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to provide a solar water heater controller in order to overcome among the prior art solar water heater's supplementary electric heater unit easy dry combustion method when the water yield is not enough and overheated and induce the defect of incident.

The utility model discloses a solve above-mentioned technical problem through following technical scheme:

a solar water heater controller, the solar water heater includes the storage water tank, its characterized in that, the solar water heater controller includes: a singlechip, a water level detection circuit, a water flow detection circuit, a water supply electromagnetic valve and a heating circuit, wherein,

the single chip microcomputer is used for closing the heating circuit to stop heating water in the water storage tank and closing the water feeding electromagnetic valve to stop water feeding to the water storage tank when the water flow detection circuit detects that water flow flows, and is used for closing the heating circuit to stop heating water in the water storage tank and opening the water feeding electromagnetic valve to feed water into the water storage tank when the water flow detection circuit does not detect that water flow flows and the water level is lower than the first liquid level.

Preferably, the solar water heater controller further comprises an infrared sensor connected with the single chip microcomputer, the infrared sensor is used for detecting whether a user is near the spraying device, and the single chip microcomputer is used for closing the heating circuit to stop heating water in the water storage tank when the infrared sensor detects that the user is near the spraying device.

Preferably, the water flow detection circuit comprises a water flow switch including an adjusting spring and a target plate connected to the adjusting spring, wherein the target plate is biased away from the adjusting spring by the flow of water and is reset by the elastic force of the adjusting spring after the flow of water stops.

Preferably, the water flow switch is arranged at the water outlet of the water storage tank.

Preferably, the solar water heater controller further comprises a water temperature detection circuit connected with the single chip microcomputer, and the single chip microcomputer is used for starting the heating circuit to heat water in the water storage tank when the water temperature detection circuit detects that the water temperature in the water storage tank falls into a set temperature range and the water level is higher than a first liquid level.

Preferably, the water supply solenoid valve is closed to stop water supply to the water storage tank when the water level detection circuit detects that the water level in the water storage tank is higher than the second liquid level.

Preferably, the singlechip is an AT89C52 singlechip.

On the basis of the common knowledge in the field, the above preferred conditions can be combined at will to obtain the preferred embodiments of the present invention.

The utility model discloses an actively advance the effect and lie in: through this controller, no matter be under the condition that the user used solar water heater, still under the condition that the liquid level is less than the standard in the water storage tank, heating circuit all can be cut off, stops the heating to water, has avoided dry combustion method and has induced the overheated condition of heater, has avoided the potential safety hazard, has ensured user's safety.

Drawings

Fig. 1 is a schematic diagram of a solar water heater controller according to an embodiment of the present invention.

Fig. 2 is a schematic view of a water flow switch according to an embodiment of the present invention.

Fig. 3 is a schematic diagram of the operation of a water flow switch according to an embodiment of the present invention, in which a normally open contact (NO) and a normally closed contact (NC) of the water flow switch are shown.

Detailed Description

The present invention is further illustrated by way of the following examples, which are not intended to limit the scope of the invention.

Referring to fig. 1 to 3, the solar water heater according to the present embodiment includes a water storage tank, and a solar water heater controller including: singlechip 1, water level detection circuit 2, rivers detection circuit 3, water feeding solenoid valve 5 and heating circuit 4, wherein, singlechip 1 is used for closing heating circuit 4 when rivers detection circuit 3 detects that the rivers flow and closes water feeding solenoid valve 5 with the intaking of stopping the storage water tank with stopping the heating to the storage water tank, and be used for closing heating circuit 4 when rivers detection circuit 3 does not detect that the rivers flow and the water level is less than first liquid level with stopping the heating to the storage water tank normal water and open water feeding solenoid valve 5 with intaking to the storage water tank.

Specifically, when the water flow detection circuit detects that water flows, it is determined that a user is using water in the water storage tank, and in order to prevent the water amount from being reduced due to use, the liquid level is lowered, and the liquid level may be lower than a first liquid level (lower water level limit), so that the heater in the water storage tank is exposed above the liquid level, and the heater is overheated, the single chip microcomputer turns off the heating circuit to stop heating water. Furthermore, when the water flow is detected, the user's requirement for hot water is indicated, and at this time, in order to ensure proper water temperature, the water supply solenoid valve needs to be closed to prevent cold water from being injected into the water storage tank to affect the water temperature. In addition, even when water flow is not detected, namely when no one uses the water heater, the water heater further judges that the water level is still lower than the first liquid level, the heating circuit is still selected to be closed, and the water feeding electromagnetic valve is opened to inject water, so that overheating caused by dry burning of the heater is avoided.

In a preferred embodiment, the solar water heater controller further comprises an infrared sensor 6 connected with the single chip microcomputer 1, the infrared sensor 6 is used for detecting whether a user is near the spraying device, and the single chip microcomputer 1 is used for turning off the heating circuit 4 to stop heating water in the water storage tank when the infrared sensor detects that the user is near the spraying device. When the user is using hot water, the water level in the water reservoir will drop, which causes the heater to stop heating the water until the user is no longer using hot water by turning off the heating circuit in order to avoid overheating of the heater above the water level.

Specifically, the water flow detection circuit includes a water flow switch 31 (the whole of the water flow switch is denoted by 31 in fig. 2), and the water flow switch 31 includes an adjusting spring 32 and a target 33 connected to the adjusting spring, wherein the target is biased away from the adjusting spring by the flow of water flow and is reset by the elastic force of the adjusting spring after the flow of water flow is stopped. The water flow switch is arranged at the water outlet of the water storage tank. Wherein, the stainless steel sheet like the oar of the target piece of water flow switch is put in the water pipe, and the outside drives the switch through mechanical transmission, and the switch has 2 contacts, and a normally open and a normally closed, rivers will drive the switch action when flowing (like the arrow direction in figure 3).

In addition, the solar water heater controller further comprises a water temperature detection circuit 7 connected with the single chip microcomputer, and the single chip microcomputer 1 is used for starting the heating circuit 4 to heat water in the water storage tank when the water temperature detection circuit 7 detects that the water temperature in the water storage tank falls into a set temperature range and the water level is higher than a first liquid level.

In addition, when the water level detection circuit 2 detects that the water level in the water storage tank is higher than the second liquid level, the water feeding electromagnetic valve 5 is closed to stop water feeding into the water storage tank so as to avoid overflowing of water in the water storage tank.

Wherein, the singlechip is an AT89C52 singlechip. The water temperature detection circuit adopts DS1B820 as a temperature sensor.

In actual use, the solar water heater controller firstly judges whether the water flow detection circuit detects water flow, if so, the water supply electromagnetic valve is closed to stop water inlet of the water storage tank, and the heating circuit is closed to stop heating of the heater. If no water flows, detecting whether the water level is lower than a first liquid level, if so, detecting that the risk of dry burning exists and the heating circuit needs to be closed; if the water level is higher than the first liquid level, further detecting whether the water level is higher than a second liquid level (upper limit of the water level), and if so, closing the water feeding electromagnetic valve to prevent water from overflowing; if not, the water level is considered to be at a proper position, and if the temperature is lower, the heating circuit can be started to heat the water by the heater.

Although particular embodiments of the present invention have been described above, it will be appreciated by those skilled in the art that these are examples only and that the scope of the present invention is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the spirit and the principles of the present invention, and these changes and modifications are all within the scope of the present invention.

Claims

1. A solar water heater controller, the solar water heater includes the storage water tank, its characterized in that, the solar water heater controller includes: a singlechip, a water level detection circuit, a water flow detection circuit, a water supply electromagnetic valve and a heating circuit, wherein,

2. A solar water heater controller as defined in claim 1 further comprising an infrared sensor connected to the single chip for detecting the presence of a user in the vicinity of the spray device, the single chip for shutting off the heating circuit to stop heating of the water in the water storage tank when the infrared sensor detects the presence of a user in the vicinity of the spray device.

3. A solar water heater controller as claimed in claim 1, wherein the water flow detection circuit comprises a water flow switch including an adjusting spring and a target plate connected to the adjusting spring, wherein the target plate is biased away from the adjusting spring by the flow of water and is reset by an elastic force of the adjusting spring after the flow of water stops.

4. A solar water heater controller as defined in claim 3 wherein the water flow switch is disposed at the outlet of the water storage tank.

5. The solar water heater controller according to any one of claims 1-4, further comprising a water temperature detection circuit connected to the single chip, wherein the single chip is configured to activate the heating circuit to heat the water in the water storage tank when the water temperature detection circuit detects that the water temperature in the water storage tank falls within a predetermined temperature range and the water level is higher than the first liquid level.

6. A solar water heater controller as claimed in any one of claims 1 to 4 wherein the water supply solenoid valve is closed to stop water supply to the water storage tank when the water level detection circuit detects that the water level in the water storage tank is above the second level.

7. A solar water heater controller as claimed in any one of claims 1-4, wherein said single chip microcomputer is AT89C52 single chip microcomputer.