JP3902608B2 - Boiler system for heating and hot water using solar heat - Google Patents

Description

  The present invention relates to a boiler system for heating and hot water supply using solar heat, and more specifically, it is possible to prevent a phenomenon in which air is generated and stagnated in a pipe through which a heat medium liquid flows, thereby The heat transfer fluid smoothly flows to more efficiently recover solar heat absorbed by the heat transfer fluid, and at the same time, troublesome work for removing air from the piping and damage to the piping due to thermal expansion of the air are prevented. The semi-permanent use is possible, the solar heat absorbed by the heat medium liquid is separated and stored in the low temperature part and the high temperature part, and the low temperature part side is continuously heated by solar heat to heat and hot water on the high temperature part side So that solar heat can be used substantially and efficiently for heating and hot water supply, while at the same time providing a continuous supply of hot water. Only a small amount of hot water is heated intensively by supplementing only a small amount of energy corresponding to 10-30% to hot water preheated by solar heat to 70-90% of the required temperature even when the auxiliary boiler is operating. By using solar heat, it was possible to minimize the waste of energy by preventing the unnecessary operation of the boiler and the heating load due to its operation by enabling the shortage of heat sources to be quickly replenished. The present invention relates to a heating and hot water boiler system.

  Generally, a boiler system using solar heat is used to prevent the waste of fossil fuel and the pollution of the environment due to the use of oil, coal or natural gas. In the early days of its widespread use, the time when solar heat can be recovered is limited to daytime, and it becomes impossible to recover solar heat during cloudy weather or rainy weather. However, it has not been widely used due to the disadvantage that it is not only intermittently performed but also has a low heat collection density and cannot be formed as a large energy source. With the development of technology that can collect solar heat at high density and accumulate the heat, boiler systems that use solar heat have become popular. Is a situation that has been dispersed.

  As described above, the boiler system using solar heat can be divided into various forms according to the installation location and the installation method, but the most typical one is composed of black copper plate or copper pipe material on the surface. Install the heat collector in a box with a transparent lid and install it in a place where it is easy to collect solar heat, such as a roof, and piping for circulating the heat medium liquid inside the heat collector. A heat exchanger is formed inside the heat storage tank, and a pipe extending from the heat exchanger to the heat collector is formed with a structure in which a circulation pump for circulating the heat medium liquid is installed.

  The heat medium liquid may use a latent heat storage material such as water, and an antifreeze liquid such as ethylene glycol is mixed with water at a ratio of 50:50 in order to prevent the heat medium liquid from being frozen in winter. In the heat storage tank, hot water that has absorbed solar heat through heat exchange with the heat medium liquid is stored, so that heating and hot water supply such as indoor heating coils and hot water supply pipes are stored. It is possible to supply hot water to places that require water.

  Also, when the solar collector cannot directly absorb solar heat, such as during nighttime, cloudy weather, or rainy weather, or when the solar heat absorbed by the collector alone cannot be heated to the temperature required for heating or hot water for hot water supply The boiler for auxiliary heating is installed together with the heat storage tank so that the temperature of the hot water stored in the heat storage tank can be maintained at a constant level.

  However, in the conventional boiler system using solar heat as described above, air is generated inside the heat medium liquid pipe when a power failure, leakage of the heat medium liquid, or failure of the electric control device occurs. The generated air stagnates inside the pipe located on the upper side of the collector, which makes it difficult to smoothly circulate the heat transfer fluid. Not only was there a problem that the operator had to go up to the collector side directly to open the air valve, but if the air could not be removed in a timely manner, the heat flowing inside the piping There was a serious problem that the pipe connected to the heat collector burst while the contraction and expansion of the medium liquid were repeated.

  In addition, since the solar heat absorbed by the heat medium liquid is stored in one heat storage tank, the hot water stored in the heat storage tank cannot be separated into low and high temperatures, thereby storing the solar heat absorbed by the heat collector. This is only a simple thermal energy transfer cycle that temporarily stores the tank, and there is a problem that the heating efficiency by solar heat and the heating efficiency of hot water are greatly reduced.

  Especially when the solar collector cannot absorb solar heat directly, such as at night, in cloudy weather, or in rainy weather, or when the solar heat absorbed by the collector cannot be heated to the temperature required for heating or hot water for hot water supply. The hot water stored in the heat storage tank must be heated using an auxiliary boiler, but the entire hot water stored in one heat storage tank must be heated by the auxiliary boiler, resulting in wasted energy due to heating of the hot water Not only was there a problem, but if the hot water in the heat storage tank was heated above a certain temperature by the auxiliary boiler, it would already be above the certain temperature even if the hot water was heated by absorbing solar heat in the daytime. Since the hot water that has risen cannot be heated to a higher temperature, the low-temperature heat absorbed from the sun is effectively used for heating the hot water. There is a problem that can not.

  The present invention has been devised to solve the conventional problems as described above, and the heating hot water boiler system using solar heat according to the present invention stores heat medium liquid that has absorbed solar heat from a heat collector. Heat is exchanged with the low-temperature water stored in the heat storage tank by circulating through the pipe extending inside the tank, and the heat medium liquid thus exchanged is circulated through the heat medium tank so that residual air in the pipe At the same time, the heat medium liquid can be re-supplied by pushing it to the collector side with a circulation pump, thereby preventing the phenomenon that air is generated and stagnated in the pipe through which the heat medium liquid flows As a result, the heat transfer fluid smoothly flows to more efficiently recover the solar heat absorbed by the heat transfer fluid, and at the same time, troublesome work for removing air in the pipe and air To make it to prevent damage to the pipe due to expansion capable of semi-permanent use of the system to the technical problems.

  In addition, the heat storage tank is connected to the upper hot water storage tank by a supply convection pipe and a circulating water convection pipe, so that low temperature water and high temperature water are added to the heat storage tank and the hot water storage tank by the convection action of the hot water by each convection pipe. Are stored separately according to their temperature, so that the inside of the heat storage tank is continuously heated by low-temperature water by solar heat, and the upper side of the hot water storage tank and the supply convection pipe are used for heating and hot water supply. By concentrating only suitable high-temperature water, the solar heat absorbed by the heat transfer medium can be effectively and effectively used for heating hot water, and at the same time, it can be sustained from the heat storage tank to the hot water storage tank. It is another technical object of the present invention to ensure a sufficient amount of hot water required for heating and hot water supply through a hot water supply.

  The upper end of the supply convection pipe is individually connected to the auxiliary boiler and the indoor heating coil to form a heating system, and at the same time, the heat of the hot water stored in the supply convection pipe is primarily recovered. The upper end portion of the cold water supply pipe extending while forming a heat exchange coil is individually connected to the hot water storage tank and the auxiliary boiler, and the hot water storage tank includes a supply convection pipe and a circulating water convection pipe. By installing auxiliary heating means for secondary heating of hot water stored in the hot water storage tank connected to each other with the heat of high-temperature water, a hot water supply system is constructed, so that solar heat can be controlled according to the internal temperature conditions of the supply convection pipe and hot water storage tank. Alternatively, heating and hot water supply by the auxiliary boiler can be selectively performed, and only a small amount of hot water preheated by solar heat is collected when the auxiliary boiler is activated. By heating automatically and replenishing only the lacking heat source quickly, unnecessary operation of the boiler and the heating load due to the operation can be prevented, and waste of energy can be minimized. This is another technical issue of the present invention.

  In order to achieve the above technical problem, the present invention provides a heat medium liquid supply line extending from a solar heat collector to form a heat exchanger inside the heat storage tank, and from this heat exchanger to the solar heat collector. Since a circulation pump is installed in the extending heat medium liquid recovery line, a high temperature sensor and a low temperature sensor are installed in the heat medium liquid supply line and the recovery line, respectively. A heat medium tank for storing liquid is installed together with the circulation pump, and the heat storage tank is located above and below the hot water storage tank by a supply convection pipe connected to the upper part on one side and a circulating water convection pipe connected to the lower part on the other side. And the upper end of the supply convection pipe extends to a position higher than the hot water storage tank and is connected to the indoor heating coil and auxiliary boiler, respectively. A heating and recovery pipe extending from the water supply pipe to the supply convection pipe is provided with a circulation pump and a three-way electronic valve, and an auxiliary recovery pipe is extended from the three-way electronic valve and connected to the lower side of the circulation water convection pipe to supply the supply. The convection pipe is provided with a three-way electronic valve connected to the hot water storage tank and the auxiliary boiler on the end side of the cold water supply pipe while forming a heat exchange coil inside the convection pipe and extending to the upper end of the supply convection pipe. Inside the hot water storage tank, auxiliary heating means connected to the upper end of the supply convection pipe and circulating water convection pipe by the high temperature water supply pipe and hot water recovery pipe are installed, and the hot water supply that extends to one side of the hot water storage tank A hot water supply pipe extending from the auxiliary boiler and a flow rate detection switch are connected to the pipe, and a temperature sensor for controlling the operation of the three-way electronic valve is provided in the supply convection pipe and the hot water storage tank. Characterized in that it is location.

  As described above, the heating and hot water boiler system using solar heat according to the present invention automatically removes the air contained in the heat medium liquid in the process of flowing the heat medium liquid into the heat medium tank, and at the same time, the circulation pump collects heat. By allowing the heat medium liquid to be re-supplied by pushing it to the container side, it is possible to prevent the phenomenon of air stagnation inside the piping through which the heat medium liquid circulates. Effective heating of hot water by smooth circulation and at the same time troublesome work of removing air inside the pipe and the effect of enabling the boiler system to be used semi-permanently by preventing the pipe bursting phenomenon. There is something.

Hereinafter, the present invention for achieving the above object will be described in detail with reference to the accompanying drawings.
FIG. 1 is a piping diagram showing an overall configuration of a heating and hot water boiler system using solar heat according to the present invention. As shown in the drawing, a heat medium liquid supply line 1a extending from a solar heat collector 1 stores heat. A heat exchanger 4 is formed inside the tank 5, and a heat medium liquid recovery line 1b extending from the heat exchanger 4 to the solar heat collector 1 has a heat medium tank 8 for storing and circulating the heat medium liquid. And a circulation pump 9 are installed, and the heat medium liquid temperature on the heat collector 1 side and the temperature of the heat medium liquid flowing out of the heat exchanger 4 are supplied to the heat medium liquid supply line 1a and the recovery line 1b. A high-temperature sensor 2 and a low-temperature sensor 7 for measuring the temperature are respectively installed.

  The supply line 1a connected to the heat collector 1 projects from a position higher than the heat collector 1 and then extends to the lower part because the heat medium liquid stored inside the heat collector 1 is supplied from the supply line 1a. In order to prevent the space from falling to the side and prevent an empty space from being generated, it is necessary to install a separate air valve simply by forming the supply line 1a in this way. The heat medium tank 8 absorbs the expansion and contraction of the heat medium liquid, and naturally separates and removes air from the heat medium liquid that has passed through the heat exchanger 4 and at the same time becomes a heat loss. This is to replenish the liquid, and an air discharge space is formed at the upper end of the heat medium tank 8, and an automatic air discharge pipe 8b is formed on the lid 8a.

  A low water level sensor 6 is installed on one side of the heat medium tank 8 to detect the low water level when the heat medium liquid is exhausted and notify the replenishment of the heat medium liquid by an alarm device built in the boiler system. Yes.

  And the said heat storage tank 5 which equips the inside with the heat exchanger 4 by the flow piping of a heat-medium liquid is the supply convection pipe 10 connected with the one side upper part, and the circulating water convection pipe 12 connected with the other side lower part The hot water storage tank 11 installed on the upper side is installed so as to be able to exchange heat. The circulating water convection pipe 12 is connected and installed, and the upper end of the circulating water convection pipe 12 is connected to the lower side of the hot water storage tank 11 so that the solar heat absorbed in the heat storage tank 5 is circulated in a convection manner so that the high temperature portion and the low temperature It was possible to separate the parts.

  That is, the supply convection pipe 10 transfers the hot water heated in the heat storage tank 5 to the upper part and concentrates the heat of the hot water at its upper end extending to a position higher than the hot water storage tank 11, thereby heating or supplying hot water or hot water. The circulating water convection pipe 12 serves to collect and store the hot water used in the water, and transfer the warm water that is lowered to a low temperature after heat exchange to the heat storage tank 5 to reheat it. The supply convection pipe 10 and the circulating water convection pipe 12 allow the low-temperature water and the high-temperature water to be separated and stored in the heat storage tank 5 and the hot water storage tank 11, respectively, and at the same time the highest at the upper end of the supply convection pipe 10 It becomes possible to aggregate high temperature water.

  The indoor heating coil 15 is connected to the upper end of the supply convection pipe 10 that plays the above-mentioned role by the hot water supply pipe 13 and the heating recovery pipe 16, and at the same time, the auxiliary boiler 20 is connected and installed by the heating pipe 21. The heating recovery pipe 16 extending from the heating coil 15 to the supply convection pipe 10 is provided with a circulation pump 17 and a three-way electronic valve 18, and an auxiliary recovery pipe 19 is extended below the three-way electronic valve 18 to extend the circulating water convection. Connected to the lower side of the tube 12.

  Also, an auxiliary heating temperature sensor 10b that controls the operation of the three-way electronic valve 18 according to the internal temperature of the supply convection tube 10 is installed at one side upper portion of the supply convection tube 10 to measure the temperature value measured from the supply convection tube 10. Thus, heating by solar heat and auxiliary heating by a boiler can be selectively performed.

  A cold water supply pipe 22 extending from a cold water supply source (not shown) is arranged in a zigzag configuration inside the supply convection pipe 10 to form a heat exchange coil 10a, and the supply convection pipe is extended from the heat exchange coil 10a. A three-way electronic valve 23 connected to the hot water storage tank 24 by an inflow pipe 24 a and connected to the auxiliary boiler 20 by a hot water supply pipe 27 is installed at the distal end of the cold water supply pipe 22 that extends to the top of 10.

  The hot water storage tank 24 serves to store the hot water that is primarily heated while the cold water flowing through the cold water supply pipe 22 passes through the heat exchange coil 10a of the supply convection pipe 10, and supplies hot water therein. Auxiliary heating means 25 connected to the upper end of the supply convection pipe 10 by a pipe 25a and connected to the upper end of the circulating water convection pipe 12 by a hot water recovery pipe 25b is installed. The hot water stored in the hot water storage tank 24 can be heated to a temperature suitable for the hot water supply with the high temperature water stored in the upper end portion.

  For reference, the auxiliary heating means 25 at this time may not be supplied with hot water from the circulating water convection pipe 12 but may be a means for heating water with a separate heating means (gas heater, electric heater, etc.).

  In addition, a hot water supply pipe 24b for supplying hot water to a required place is connected to one side of the hot water storage tank 24, and a heat exchange coil 20a is provided inside the auxiliary boiler 20 in the hot water supply pipe 24b. A hot water supply pipe 27 and a flow rate detection switch 30 that extend while being formed are connected to each other, and a hot water supply temperature sensor 26 that controls the operation of the three-way electronic valve 23 according to the internal temperature of the hot water storage tank 24 at one side upper part of the hot water storage tank 24. The hot water supply by the solar heat and the hot water supply by the boiler can be selectively performed according to the temperature value measured from the hot water storage tank 24.

  The flow rate detection switch 30 installed in the hot water supply pipe 24b is used when hot water flows through the hot water supply pipe 24b by opening a water tap or valve (not shown) for use of hot water. When the hot water does not flow through the hot water supply pipe 24b by tightening the water faucet or valve by connecting the contact wire to the electric wire that bends in the flow direction, the auxiliary boiler 20 is operated. It plays a role of disengaging at the contact portion and stopping the operation of the auxiliary boiler 20.

  In addition to the hot water storage tank 24, an expansion tank 28 for absorbing the expansion force inside the system due to the rise in water temperature is installed together with the supply of water to the boiler system in the same manner as that installed in the general boiler system. The expansion tank 28 has an expansion line 28a integrally connected to the high-temperature water supply pipe 25a extending from the supply convection pipe 10 to the auxiliary heating means 25. The expansion line 28a penetrates on one side of the expansion tank 28, and supplies water to the boiler system on the other side. A boiler water supply pipe 29 for supplying water is extended and connected to the lower side of the circulating water convection pipe 12.

  Further, on both sides of the expansion tank 28, an overflow pipe 28b that automatically discharges water to the outside of the expansion tank 28 when the water stored in the expansion tank 28 exceeds a certain level, and the expansion tank 28 The replenishment water supply pipes 28c for supplying the supply water to the expansion tank 28 by the amount of the water evaporated in the above are formed in a connected configuration.

  The operational relationship of the present invention formed as described above will be described in more detail with reference to FIGS. 2 and 3, and the description of the operational relationship of the present invention will be described in order to help understanding the boiler system according to the present invention. The boiler system of the invention will be described separately when it is applied to a heating cycle and when it is applied to a hot water supply cycle. However, the heating cycle and the hot water supply cycle are performed at the same time, and indoor heating and hot water supply are performed. It is comprised so that it may perform together.

  FIG. 2 is a piping diagram showing a state in which the boiler system according to the present invention is applied to a heating cycle. As shown in the drawing, when the heat medium liquid is heated by absorbing solar heat in the heat collector 1, the temperature becomes high. The temperature value measured from the sensing sensor 2 becomes higher than the temperature value measured from the low-temperature sensing sensor 7, whereby a signal is transmitted from each sensor 2, 7 to operate the circulation pump 9, thereby operating the heat collector 1. The heat medium liquid that has absorbed solar heat from the air flows into the heat exchanger 4 through the inflow line 1a, and is then recovered again to the heat collector 1 side through the recovery line 1b including the heat medium tank 8, and in this process The low temperature water stored in the tank 5 is heated by the heat medium liquid flowing in the heat exchanger 4.

  At this time, in the heat medium tank 8, the air automatic discharge pipe 8 b is formed on the lid 8 a so that the air contained in the heat medium circulated through the heat exchanger 4 can escape at any time.

  As described above, if the heat medium liquid is caused to flow through the supply line 1a, the heat exchanger 4, the heat medium tank 8, and the recovery line 1b using the circulation pump 9, the heat medium liquid is generated in the flow process of the heat medium liquid. The air is automatically removed in the course of the flow of the heat medium liquid into the heat medium tank 8 and not only passes through the air discharge space formed in the upper part of the heat medium tank 8, but also supplied on the heat collector 1 side. Since the circulation pump 9 pushes the heat medium toward the heat collector 1 in a state where the line 1a protrudes from a position higher than the heat collector 1, the heat medium liquid supply line 1a, the recovery line 1b, The phenomenon that air stagnates in the internal space of the heat collector 1 does not occur.

  As a result, the circulation of the heat medium liquid by the circulation pump 9 can be achieved more smoothly, so that the hot water stored in the heat storage tank 5 is more effectively heated using the solar heat absorbed by the heat medium liquid. As a result, there is no need for the operator to go up directly to the collector 1 side installed on the roof of the building and remove the air inside the pipe one by one. The phenomenon that the pipe connected to the heat collector 1 is ruptured while the contraction and expansion of the flowing heat medium liquid is repeated is prevented in advance.

  If the hot water in the heat storage tank 5 is continuously heated by flowing the heat medium liquid that has absorbed solar heat into the heat exchanger 4 as described above, the temperature of the hot water stored in the heat storage tank 5 is increased. However, the hot water in the heat storage tank 5 has a higher temperature on the upper side than the lower side, so that the hot water on the upper side of the heat storage tank 5 is supplied via the supply convection pipe 10 to the hot water storage tank. 11, the temperature of the hot water storage tank 11 is maintained at a temperature higher than that of the heat storage tank 5.

  In addition, since the temperature of the hot water stored in the hot water storage tank 11 is further higher than the lower side, the high temperature water on the upper side of the hot water storage tank 11 is concentrated on the upper end of the supply convection pipe 10 and its lower side. A part of the hot water is re-flowed into the lower part of the heat storage tank 5 through the circulating water convection pipe 12 and heated, so that the heating and circulation of the hot water by the solar heat is continuously performed until sunset. Hot water having a higher temperature is stored one after another from the heat storage tank 5 to the hot water storage tank 11 and the upper end of the supply convection pipe 10, so that low temperature water and high temperature water can be effectively separated.

  If the temperature value measured from the high temperature sensor 2 and the temperature value measured from the low temperature sensor 7 are almost the same by the continuous heating of the hot water by solar heat as described above, each sensor 2, 7, the circulation of the heat medium liquid is interrupted by stopping the operation of the circulation pump 9 by transmitting a signal, and the temperature measured from the high temperature sensor 2 in such a state that the circulation of the heat medium liquid is interrupted. If the temperature value measured from the low-temperature sensor 7 becomes lower than the value again, the circulation pump 9 is restarted and the heat medium liquid is circulated again.

  As described above, the boiler switch 14 installed in the room is turned on and on in a state where the high-temperature water concentrated at the upper end of the supply convection pipe 10 is heated to a temperature suitable for room heating by circulating the heat medium liquid. For example, when the circulation pump 17 connected to the indoor heating coil 15 is operated, the hot water flows into the indoor heating coil 15 through the hot water supply pipe 13 to perform heating. The hot water used in the process flows into the circulating water convection pipe 12 through the heating recovery pipe 16, the three-way electronic valve 18 and the auxiliary recovery pipe 19.

  As described above, the hot water flowing into the circulating water convection pipe 12 consumes a large amount of heat energy during the initial heating, and flows into a relatively low temperature. In such a case, the circulating water convection pipe 12 flows. The hot water that has flowed in through the heat source is reheated by solar heat by being supplied to the heat storage tank 5 by its convection action, but the temperature of the hot water that flows in through the circulating water convection tube 12 due to a rise in indoor temperature due to continuous heating Is higher than the temperature of the hot water stored in the heat storage tank 5, the hot water flowing in through the circulating water convection pipe 12 is supplied to the hot water storage tank 11 side without being supplied to the heat storage tank 5 by the convection action. Thus, the temperature inside the heat storage tank 5 is prevented from rising and the hot water can be continuously heated by solar heat.

  As described above, if the internal temperature of the supply convection pipe 10 falls to a low temperature that cannot be heated in the process of continuously heating by solar heat as described above, the auxiliary heating temperature sensor 10b senses this temperature. By operating the auxiliary boiler 20 and the three-way electronic valve 18, the conduit from the heating recovery pipe 16 to the auxiliary recovery pipe 19 is blocked, and at the same time, the conduit of the heating recovery pipe 16 is directly connected to the upper end of the supply convection pipe 10. A heating cycle by the auxiliary boiler 20 is performed so that only the hot water stored in the supply convection pipe 10 is heated to a temperature required for heating by operating the auxiliary boiler 20 only for the amount of heat that is insufficient for heating. It becomes true.

  That is, when the temperature required for heating is 45 ° C., even if the temperature at the upper end of the supply convection tube 10 drops below 45 ° C. during the night time when solar heat cannot be absorbed, it is stored in the hot water storage tank 11. The temperature of the hot water is not only about 40 ° C., but the heat energy stored in the heat storage tank 5 and the hot water storage tank 11 is not lost during the daytime, and is not lost by the convection action through the convection tubes 10 and 12. The heat energy is continuously concentrated at the upper end of the supply convection tube 10 so that the temperature of the upper end of the supply convection tube 10 is maintained at about 40 ° C. for a long time even during heating by the auxiliary boiler 20. If the auxiliary boiler 20 heats the hot water by about 5 ° C., the hot water necessary for heating can be supplied continuously.

  Of the 100% temperature required for heating as described above, hot water heated to a temperature of about 70 to 90% by solar heat is always stored in the upper portion of the supply convection tube 10 and thus corresponds to the remaining 10 to 30%. It is only necessary to heat the auxiliary boiler 20 only at a temperature level to replenish the insufficient amount of heat, and the amount of hot water heated by the auxiliary boiler 20 is not the total amount of hot water stored in the heat storage tank 5 and the hot water storage tank 11. By heating only the necessary minimum amount, not only the heating load of the hot water by the auxiliary boiler 20 can be significantly reduced, but also the waste of energy due to excessive operation of the auxiliary boiler 20 can be prevented. Is.

  In the process of heating by the auxiliary boiler 20 as described above, the internal temperature of the heat storage tank 5 is maintained at a very low state by the convection action, so that the immediate solar heat that satisfies the condition for absorbing the solar heat from the heat collector 1 can be obtained. The hot water is absorbed quickly and substantial heating of the hot water by solar heat is performed, whereby the temperature of the hot water storage tank 11 rises again, and the hot water stored at the upper end of the supply convection pipe 10 is suitable for heating. The auxiliary heating temperature sensor 10b senses this temperature and stops the operation of the auxiliary boiler 20, and at the same time, the three-way electronic valve 18 causes the heating recovery pipe 16 and the auxiliary recovery pipe 19 to communicate with each other. Thus, heating by solar heat is performed again.

  FIG. 3 is a piping diagram showing a state in which the boiler system according to the present invention is applied to a hot water supply cycle. As shown, cold water supplied via the cold water supply pipe 22 is supplied into the supply convection pipe 10. The heat of the hot water stored in the supply convection pipe 10 is recovered and heated primarily in the process of flowing through the installed heat exchange coil 10a, and then the heated hot water is supplied to the three-way electronic valve 23 and the inflow pipe. It is stored in the hot water storage tank 24 through 24a.

  The hot water stored in the hot water storage tank 24 as described above is adapted to hot water supply by secondary heating by the auxiliary heating means 25 through which the high temperature water stored in the tip of the supply convection pipe 10 flows. The hot water heated to such a temperature is supplied to the place where the hot water is required via the hot water supply pipe 24b, and the hot water whose temperature has been reduced by heating the hot water is used as auxiliary heating means. 25, the hot water supplied again to the upper part of the circulating water convection pipe 12 via the hot water recovery pipe 25b, and flows into the upper part of the circulating water convection pipe 12 as mentioned in the description of the heating cycle, It is selectively supplied to the storage tank 11 or the heat storage tank 5 and reheated.

  In the hot water heating of the hot water storage tank 24 as described above, the hot water in the supply convection pipe 10 that has been heated by absorbing solar heat is primarily used as cold water passing through the inside of the supply convection pipe 10 through the heat exchange coil 10a. When heated and supplied to the hot water storage tank 24, solar heat concentrated in the supply convection pipe 10 is primarily transmitted to the hot water storage tank 24, and the high temperature stored in the upper end of the supply convection pipe 10 The solar heat concentrated in the supply convection pipe 10 is secondarily transmitted to the hot water storage tank 24 by secondarily heating the internal hot water of the hot water storage tank 24 while the water flows in the auxiliary heating means 25. Then, the hot water whose temperature has been lowered by the auxiliary heating means 25 and heated is recovered in the heat storage tank 5 or the hot water storage tank 11 through the hot water recovery pipe 25b and the circulating water convection pipe 12. Substantial heating by solar heat is made to the hot water supply cycle by solar heat is performed again.

  As described above, in the process of hot water supply by solar heat, even if hot water is supplied to the hot water supply pipe 24 b and the flow rate detection switch 30 is set to the ON state, the auxiliary boiler 20 does not operate and is stored in the hot water storage tank 24. When the hot water is lowered to a temperature at which hot water cannot be supplied, the hot water temperature sensor 26 installed in the hot water storage tank 24 senses the temperature set value and operates the three-way electronic valve 23 to supply the hot water. The pipe connecting from the heat exchange coil 10a of the convection pipe 10 to the inflow pipe 24a is shut off, and at the same time, the pipe connected to the auxiliary boiler 20 through the hot water supply pipe 27 is opened, thereby supplying the cold water supply pipe 22 The chilled water is primarily heated while passing through the heat exchange coil 10a of the supply convection pipe 10, and thus the primary heated water is supplied. Hot water supply cycle by the auxiliary boiler 20 by being through the pipe 27 and 2 then heated via a built-in heat exchange coil 20a to the auxiliary boiler 20 is supplied to the hot water supply pipe 24b is to operate.

  In the process in which hot water is supplied by the auxiliary boiler 20 as described above, the auxiliary boiler 20 is activated only when hot water is supplied to the hot water supply pipe 24b and the flow rate detection switch 30 is set to the ON state, When hot water is not supplied to the hot water supply pipe 24b by tightening the valve, the flow rate detection switch 30 is set to an OFF state, the operation of the auxiliary boiler 20 is stopped, and the hot water stored in the hot water storage tank 24 supplies hot water. When the temperature rises again to such an extent that it can be performed, the hot water temperature sensor 26 senses the temperature set value and activates the three-way electronic valve 23, thereby causing the inflow pipe from the heat exchange coil 10 a of the supply convection pipe 10. The pipe line leading to 24a is opened and hot water supply by solar heat is performed again.

  As described above, the heating and hot water boiler system using solar heat according to the present invention separates solar heat absorbed by the heat medium liquid into the heat storage tank 5, the hot water storage tank 11, and the supply convection pipe 10 and stores them one after another. As a result, the low-temperature water stored in the heat storage tank 5 can be continuously heated by the solar heat absorbed by the heat collector 1, and only high-temperature water sufficiently heated by solar heat can be obtained. It will be used selectively for heating and hot water supply, so that not only can solar heat be used substantially and effectively for heating hot water, but also heating efficiency of hot water by solar heat can be improved to a high level. Through the continuous supply of hot water from the heat storage tank 5 to the hot water storage tank 11, a sufficient amount of hot water required for heating and hot water supply can be secured. A.

  In particular, the auxiliary boiler 20 is selectively operated only when the temperature of the hot water stored in the supply convection pipe 10 and the hot water storage tank 24 becomes low enough to be unsuitable for heating and hot water supply. The hot water heated by the solar boiler 20 is in a state where the heat energy absorbed from the solar heat is continuously replenished to the upper part of the supply convection pipe 10 via the hot water storage tank 11 by the convection rise, and the auxiliary boiler 20 has only the amount of heat that is insufficient. At the same time as the replenishment heating, the amount of hot water heated by the auxiliary boiler 20 is concentrated not only in the total amount of hot water stored in the heat storage tank 5 and the hot water storage tank 11 but also in the minimum amount necessary for heating and hot water supply. By heating, the waste of energy due to the operation of the auxiliary boiler 20 and the heating load of the auxiliary boiler 20 are minimized. While but also be able to continuously supply hot water necessary for heating and hot water supply.

  Moreover, by separating the hot water heated by the heat medium liquid into low-temperature water and high-temperature water and storing them, the low-temperature water is continuously heated by the solar heat absorbed by the heat collector, and at the same time the solar heat is sufficient. Only hot water heated to hot water can be selectively used for heating and hot water supply, so that solar heat can be used substantially and effectively for heating hot water, as well as for auxiliary boilers at night and in rainy weather. There is an effect that it is possible to improve the heating efficiency of the hot water by the solar heat to a high level by preventing the solar heat utilization effect from being lowered.

  In particular, only when the temperature of the hot water stored in the supply convection pipe and the hot water storage tank becomes low enough to be unsuitable for heating and hot water supply, the auxiliary boiler is selectively operated to replenish the insufficient amount of heat. In addition, the amount of hot water heated by the auxiliary boiler is also intensively heated to the minimum amount required for heating and hot water supply, thereby reducing the waste of energy from the operation of the auxiliary boiler and the heating load by the auxiliary boiler. While minimizing, the hot water required for heating and hot water supply can be supplied continuously.

  The present invention can be widely used by installing it in a residential house, a commercial hotel, a dormitory building of a school or public institution where solar heat can be received.

The piping diagram which showed the whole structure of this invention. The piping diagram which showed the heating cycle operation state of this invention. The piping diagram which showed the hot water supply cycle operation state to this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Heat collector 1a Supply line 1b Recovery line 2 High temperature sensor 3 Check valve 4 Heat exchanger 5 Heat storage tank 6 Low water level sensor 7 Low temperature sensor 8 Heat medium tank 9, 17 Circulation pump 10 Supply convection pipe 10a, 20a heat Replacement coil 10b Auxiliary heating temperature sensor 11 Hot water storage tank 12 Circulating water convection pipe 13 Hot water supply pipe 14 Boiler switch 15 Heating coil 16 Heating recovery pipe 18, 23 Three-way electronic valve 19 Auxiliary recovery pipe 20 Auxiliary boiler 21 Heating pipe 22 Cold water supply pipe 24 Hot water storage tank 24a Inflow pipe 24b Hot water supply pipe 25 Auxiliary heating means 25a High temperature water supply pipe 25b Hot water recovery pipe 26 Hot water temperature sensor 27 Hot water supply pipe 28 Expansion tank 28a Expansion line 28b Overflow pipe 28c Supplementary water supply pipe 29 Boiler supply pipe 30 Flow velocity Switch

Claims (3)

A solar heat collector 1 for containing a heat medium liquid for absorbing solar heat;
A supply line 1a for supplying a heat medium liquid extending from the solar heat collector 1;
A heat exchanger 4 formed by the supply line 1a for exchanging heat by circulating a heat medium liquid;
A heat storage tank 5 having the heat exchanger 4 therein;
A recovery line 1b for recovering a heat medium liquid extending from the heat exchanger 4 to the solar heat collector 1;
A circulation pump 9 installed in the recovery line 1b;
A boiler system for heating and hot water using solar heat, comprising:
A hot water storage tank 11 installed at a position higher than the heat storage tank 5;
A supply convection pipe 10 connected to the hot water storage tank 11 in order to connect the upper side of the heat storage tank 5 and the hot water storage tank 11;
A circulating water convection pipe 12 connected to the hot water storage tank 11 in order to connect the lower part of the other side of the heat storage tank 5 and the hot water storage tank 11;
An upper end portion of the supply convection pipe 10 extends to a position higher than the hot water storage tank 11;
A boiler system for heating and hot water supply using solar heat, wherein a hot water supply pipe 13 is connected to an upper end portion of the supply convection pipe 10 . Furthermore, it has a heat medium tank 8 connected to the heat exchanger 4, outside the heat storage tank 5 and installed at a position lower than the solar heat collector 1,
The supply line 1a is
The boiler system for heating and hot water supply using solar heat according to claim 1, further comprising a path protruding at a position higher than the solar heat collector 1 . The heat medium tank 8 is
A lid 8a at the top of the heat medium tank 8,
An automatic discharge pipe 8b formed on the lid 8a;
The boiler system for heating and hot water supply using solar heat according to claim 2 .

Images