JP4777746B2 - Solar water heating system - Google Patents

Description

  The present invention relates to a solar hot water supply system.

  Various hot water supply systems using solar heat have been proposed in the past.For example, a solar heat collecting section, a pump, and a heat exchanging section are interposed in a water circulation circuit, and the solar heat collecting section is driven by driving the pump. There is a solar water heating system that heats water in a circulation circuit by solar heat and transmits the heat of the heated water to water in a hot water storage tank or the like in a heat exchange section to make hot water for hot water supply.

  However, for example, in the water circulation solar water heating system as described above, water is always present inside the solar heat collector, and therefore, if the pump is stopped during the sun, the solar heat collector Depending on the heat collection capacity of the solar heat collector, the water in the solar heat collector may boil at a high temperature, causing damage or failure to the equipment and related parts that make up the solar heat collector. is there.

  If the water is drained from the inside of the solar heat collector and left empty, the solar heat collector will be at a higher temperature than the boiling temperature of the water if the pump is stopped during the sun. Therefore, there is a risk of damaging the equipment and related parts constituting the solar heat collecting part.

  In view of the above problems, the present invention provides a solar-powered hot water supply system capable of preventing damage and failure of equipment and related parts that constitute a solar heat collecting part due to solar heat when a drive source such as a pump is stopped. The issue is to provide.

Said subject is provided with a water flow section, a solar heat collecting section for heating water passing through the water flow section with solar heat,
A water inlet pipe connected to the water inlet of the solar heat collector,
A water delivery pipe connected to the water outlet of the solar heat collector,
A drive source such as a pump provided on the water feed pipe side or the water feed pipe side is provided, and the water fed from the water feed pipe to the water flow section of the solar heat collecting section by driving the drive source In a hot water supply system using solar heat that is heated and sent to a water delivery pipe,
A water pipe is connected to the water inlet pipe side, and water from the water pipe can be passed through a water flow section of a solar heat collecting section when the drive source is stopped. Solved by hot water system.

  In this system, a water pipe is connected to the water inlet pipe side so that water from the water pipe can be passed through the water collector of the solar heat collector when the drive source is stopped. Even if the driving source such as a pump is stopped during the day, the solar heat collecting part is cooled by supplying water from the water pipe to the water passing part in the solar heat collecting part, thereby constituting the heat collecting part. It is possible to prevent the device and related parts from being damaged or broken.

  Moreover, since water from the water pipe is sent to the water flow section of the solar heat collecting section, a pump or other drive source is not necessary for feeding water, and damage and malfunctions are advantageously prevented in terms of cost. be able to.

  In particular, in the above-mentioned solar water heating system, when the driving source is stopped, the water source of the solar heat collecting unit is filled with water, and the driving source such as a pump is stopped during the sun. However, it is possible to prevent boiling of water in the solar heat collecting section, and it is possible to prevent damage and failure due to boiling of the equipment and related parts constituting the solar heat collecting section. Moreover, the water filled in the water flow section can primarily prevent the damage and failure of the equipment and related parts constituting the solar heat collecting section.

In the above system, a temperature sensor that detects the temperature of the solar heat collector, and
A valve for opening and closing the water pipe,
A valve opening / closing drive unit;
A control unit that outputs a command signal for opening the valve to the valve opening / closing drive unit when the temperature reaches a predetermined dangerous temperature based on a signal from the temperature sensor may be provided.

  In this case, the tap water can be sent to the water flow section of the solar heat collection section in a timely manner, and it is possible to reliably prevent the damage and failure of the equipment and related parts constituting the solar heat collection section.

  Since this invention is as the above, it can prevent the damage and failure by the heat | fever to the apparatus which comprises a solar-heat collection part, and a related site | part.

  Next, the best mode for carrying out the present invention will be described with reference to the drawings.

  In the solar water heating system of the first embodiment shown in FIG. 1, a solar heat collecting unit 2, a pump P as a driving source, and a heat exchanging unit 4 are interposed in the water circulation circuit 1 to drive the pump P. Thus, the water in the circulation circuit 1 is heated by solar heat in the solar heat collecting section 2, and the heat of the heated water is transmitted to the water in the hot water tank 5 by the heat exchanging section 4 to add the water in the hot water tank 5. The water circulation circuit 1 connects the water inlet pipe portion 1a connected to the water inlet portion 2a of the solar heat collector 2 and the water outlet portion 2b of the solar heat collector 2 by the water circulation circuit 1. Regardless of whether the pump P is driven or not, water is always in the water circulation circuit 1 including the water flow pipe 2b of the solar heat collecting section 2 formed. Existing.

  The solar heat collector 2 is configured by connecting the water passing portions 2c of the plurality of solar heat collectors 6 in series, and each solar heat collector 6 is a transparent porous material such as silica airgel, for example. A combination of a heat insulating material and a selective absorption film is used to transmit solar heat collected by the selective absorption film to the water in the water portion 2c, but there is no particular limitation, and various types of solar heat collection A vessel may be used.

  A water pipe 8 and a hot water pipe 9 are connected to the hot water tank 5, 13 is a mixing valve, and the mixing valve 13 mixes hot water boiled in the hot water tank 5 with tap water to a predetermined temperature. The high-temperature water is adjusted, and the high-temperature water and tap water are mixed and supplied to the use side. 10 is an expansion tank, 11... Is an on-off valve, and 12 is a check valve.

  The water circulation circuit 1 is connected with a water pipe 14 at a position between the pump P and the solar heat collecting section 2, that is, at a position of the water inlet pipe section 1a. A drainage pipe 15 is connected to the position between the exchange parts 4, that is, the water delivery pipe part 1b, a first open / close valve 16 is provided in the water pipe 14, and a second valve 17 is provided in the drainage pipe 15, respectively. When the first valve 16 and the second valve 17 are opened in a state where the water is stopped, the tap water does not pass through the pump P or the heat exchanging unit 4 and flows into the water passing part 2c of the solar heat collecting part 2. And drained through the drain pipe 15.

  The solar heat collecting section 2 is provided with a temperature sensor 18 for detecting the temperature of water in the water flow section 2c of the solar heat collecting section 2, and the first and second valves. 16 and 17 are provided with valve opening / closing drive parts E1 and E2, respectively. And the control part 19 which consists of microcomputers etc. is provided, and this control part 19 is based on the signal from the temperature sensor 18, and the detected temperature is 100 degreeC which is a predetermined dangerous temperature, for example, boiling temperature, or When a temperature close to 100 ° C. is reached, a command signal for opening the first and second valves 16 and 17 is output to the valve opening / closing drive units E1 and E2.

  In the solar water heating system, as shown in FIG. 2, when water is circulated in the water circulation circuit 1 by driving the pump P during the sun, the water is heated in the solar heat collecting unit 2. At the same time, the heat is transferred to the water in the hot water storage tank 4 in the heat exchanging section 4 to boil the water in the hot water storage tank 5.

  Then, during the day when the sun shines, the water in the hot water tank 5 is boiled up and the pump P is stopped, and the temperature of the water in the water flow portion 2c of the solar heat collecting portion 2 is increased by solar heat. Then, when the temperature sensor 18 detects that the boiling temperature or a temperature close to the boiling temperature is reached, the first and second valves 16 and 17 are controlled by the control unit 19 as shown in FIG. Opened, the water from the water pipe is fed into the water flow portion 2c in the solar heat collection portion 2, thereby preventing the water from boiling in the water flow portion 2c of the solar heat collection portion 2, and the heat collection portion 2 and the related parts are prevented from being damaged or broken.

  Although the embodiment of the present invention has been described above, the present invention is not limited to this, and various modifications can be made without departing from the spirit of the invention. For example, in the above-described embodiment, a solar heat collecting unit 2, a pump P, and a heat exchanging unit 4 are provided in the water circulation circuit 1, and the circulating type of boiling water in the hot water tank 5 by the heat exchanging unit 4 by solar heat. Although the case where it was applied to a hot water supply system was shown, the solar heat collection part, the pump and the hot water storage tank are interposed in the water circulation circuit, and the water in the hot water tank is circulated in the water circulation circuit and heated by solar heat. The present invention can be applied to a solar water supply system using solar heat, and can also be applied to a non-circulation solar water supply system using solar heat.

  Moreover, in said embodiment, although the case where it became the state with which water was filled in the water flow part 2c of the solar-heat collecting part 2 also at the time of the stop of the pump P was shown, when a pump P stops, a solar-heat collecting part It is also possible to apply to a solar-powered hot water supply system in which the interior of the water passage is empty.

  Moreover, in said embodiment, the case where the water from the water pipe 14 is passed through the water flow part 2c of the solar heat collecting part 2 when the pump P is stopped using the temperature sensor 18 or the control part 19 is shown. However, other detection control mechanisms may be used, or manual operation may be used.

  Moreover, the temperature sensor 18 may detect the water temperature in the water flow part 2c of the solar heat collecting part 2, or may detect the temperature of other parts of the solar heat collecting part 2. Often, the specific setpoint of the dangerous temperature may be determined accordingly.

It is explanatory drawing which shows the solar-heating utilization hot-water supply system of embodiment. It is explanatory drawing which shows the operating state in the solar heat collection by the pump drive of the system. In the system, it is explanatory drawing which shows an operation state when the abnormal rise of the temperature of a solar-heat collecting part is detected at the time of a pump stop.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1a ... Water inflow pipe part 1b ... Water delivery pipe part 2 ... Solar heat collecting part 2a ... Water flow part inlet 2b ... Water flow part outlet 2c ... Water flow part 14 ... Water pipe 15 ... Drain pipes 16, 17 ... Open / close valve 18 ... Temperature sensor 19 ... Control part E1, E2 ... Valve opening / closing drive part P ... Pump (drive source)

Claims (3)

A solar heat collecting section that includes a water flow section and heats water passing through the water flow section with solar heat ;
A drive source such as a pump ;
A hot water tank,
Provided with <br/> water circulation circuit, the water circulating circuit and solar heat collector is a drive source is interposed, the water fed to the water passing portion of the by Ri solar heat collector unit for driving the drive source solar In the hot water supply system using solar heat , the water in the water circulation circuit is heated by heating, and the water in the hot water tank is boiled with the heated water .
The said water circulation circuit, Rutotomoni water pipe is connected at the inlet side of the water passing portion of the solar heat collector, the drain pipe at the outlet side of the water passing portion of the solar heat collector is connected, first to the water pipe 1 An open / close valve is provided, and a second open / close valve is provided in the drain pipe,
When the first open / close valve and the second open / close valve are opened while the drive source is stopped, the tap water does not pass through the drive source or the hot water storage tank, and the solar heat collecting unit does not pass through the drive source or the hot water tank. It is passed through the water passing portion, solar water heating systems, characterized by being made so that is drained through the drain pipe.   The solar-powered hot water supply system according to claim 1, wherein when the drive source is stopped, the water flow section of the solar heat collecting section is filled with water. A temperature sensor that detects the temperature of the solar heat collector ,
A valve opening / closing drive section for opening / closing the first opening / closing valve and the second opening / closing valve ;
Based on a signal from the temperature sensor, when the temperature has reached a predetermined critical temperature, the claims and the control unit is provided to a command signal to open the opening and closing valve and outputs a valve opening and closing drive unit 1 or 2 The hot water supply system using solar heat as described in 1.

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