KR101376058B1

KR101376058B1 - Passive Solar Hot Water System

Info

Publication number: KR101376058B1
Application number: KR1020120051522A
Authority: KR
Inventors: 홍희기
Original assignee: 경희대학교 산학협력단
Priority date: 2012-05-15
Filing date: 2012-05-15
Publication date: 2014-03-19
Also published as: KR20130127765A

Abstract

The present invention relates to a natural circulation solar hot water system, the present invention, a collector for collecting solar heat; A heat storage tank connected through the collector and the collector circulation pipe and performing heat exchange between the working medium in which solar heat is collected and water used for living; A hot water circulation pipe communicating with the heat storage tank and supplied with the water; A first valve provided at one side of the hot water circulation pipe to selectively flow water in the heat storage tank into the hot water circulation pipe by selective opening and closing; A hot water outlet pipe communicating with the other side of the hot water circulation pipe; A second valve provided in the middle of the hot water discharge pipe; And controlling the opening or closing of the first valve when the water temperature T1 of the heat storage tank reaches a first opening temperature Ta or a first closing temperature Tb, for a predetermined portion of the hot water circulation pipe. When the temperature T2 reaches the second opening temperature Ta 'or the second closing temperature Tb', the first valve is opened or closed, and when the opening time of the first valve exceeds the set time, And a controller for automatically closing the first valve regardless of the temperature T2.
According to the present invention, according to the temperature of the hot water circulating pipe and the temperature change of the heat storage tank, by operating the freeze prevention valve appropriately to basically prevent the freezing of the heat storage tank and the hot water discharge pipe, the temperature of the hot water rises above the set temperature or below the set temperature. In the case of falling, the user can easily recognize the emergency situation by voice, and can easily recognize whether the hot water is used by using solar energy or by boiler without consuming energy. It works.

Description

Natural Circulation Solar Hot Water System {Passive Solar Hot Water System}

The present invention relates to a natural circulation solar hot water system, and more particularly, to a system for producing hot water using heat collected by solar heat.

Recently, as the alternative energy for petroleum resources, technologies that generate electricity using solar heat or apply hot water systems are increasing. In accordance with this trend, solar hot water systems that produce hot water using solar heat have been widely commercialized.

Thus, a technology related to a solar hot water system for producing hot water using solar heat has been proposed in Patent Registration Nos. 10-0957593 and 2011-0061175.

Hereinafter, the solar hot water system structure disclosed in Patent Registration Nos. 10-0957593 and 2011-0061175 as prior art will be briefly described.

1 is a block diagram of the entire system of Patent Registration No. 10-0957593 (hereinafter referred to as "prior art 1").

As shown in FIG. 1, the solar thermal machine room of the prior art 1 is disposed diagonally outside the upper building to install a heat collecting plate 200 for absorbing solar heat, and a heat storage chamber for storing the solar heat absorbed by the heat collecting plate 200. 400 and a boiler system installed at an existing hot water supply location, and includes a heat medium storage tank 300 for storing a heat medium and a heat exchanger for heat-exchanging the water in the heat medium and the heat storage chamber 400 at the heat collecting plate 200. It further comprises 300).

However, the solar thermal mechanical room according to the prior art 1 is for the purpose of freezing only, there is a limit that the user does not recognize when the freezing prevention function is lost due to a malfunction or damage, etc. When the temperature is lower than the set temperature, the hot water or heating is performed through the operation of the boiler, and the user is not aware of the conversion process.

FIG. 2 is a system configuration diagram of Korean Patent Laid-Open Publication No. 2011-0061175 (hereinafter, referred to as “Prior Art 2”).

The hot water heating apparatus using the solar heat of the prior art 2 is installed in the solar collector to heat the water that is the heat exchange medium 10 to a certain height to receive the maximum solar heat, the water is a heat exchange medium heated in the collector 10 discharge pipe The heat storage tank 30 is stored in the storage tank 30 and supplied as heating or hot water, and the water in the storage tank 30 is pumped to the pump 40 to be supplied to the collector 10 through the supply pipe 12. 40 is a hot water heating device using solar heat to make drainage when the operation is stopped, the water discharged from the heat storage tank 30 is maintained at a predetermined level in the recovery tank 50, the collector (pump 40) 10) but the recovery tank 50 is made by allowing the water filled in the collector 10 and the supply pipe 12 is drained and filled.

However, the hot water heating device using the solar heat of the prior art 2 is intended to prevent freezing as in the prior art 1, but there is a limit that the user does not recognize when the freezing prevention function is lost due to a malfunction or damage. When hot water or heating is performed and the temperature of the collection temperature is lower than the set temperature, the hot water or heating is performed through the operation of the boiler, and the user is not aware of the conversion process.

KR 10-0957593 B1 KR 10-2011-0061175 A

An object of the present invention is to solve the problems of the prior art as described above, while basically preventing the freezing of the heat storage tank and hot water discharge pipe by operating the freeze protection valve appropriately in accordance with the temperature change of the hot water circulation pipe and the temperature of the heat storage tank, When the temperature of hot water rises above the set temperature or falls below the set temperature, the user can easily recognize the emergency situation by voice output and use solar energy without consuming energy when using hot water or through a boiler. It is to provide a natural circulation solar hot water system that makes it easy to recognize whether or not by flashing the lamp.

According to a feature of the present invention for achieving the object as described above, the present invention, a collector for collecting solar heat; A heat storage tank connected through the collector and the collector circulation pipe and performing heat exchange between the working medium in which solar heat is collected and water used for living; A hot water circulation pipe communicating with the heat storage tank and supplied with the water; A first valve provided at one side of the hot water circulation pipe to selectively flow water in the heat storage tank into the hot water circulation pipe by selective opening and closing; A hot water outlet pipe communicating with the other side of the hot water circulation pipe; A second valve provided in the middle of the hot water discharge pipe; And controlling the opening or closing of the first valve when the water temperature T1 of the heat storage tank reaches a first opening temperature Ta or a first closing temperature Tb, for a predetermined portion of the hot water circulation pipe. When the temperature T2 reaches the second opening temperature Ta 'or the second closing temperature Tb', the first valve is opened or closed, and when the opening time of the first valve exceeds the set time, A controller for automatically closing the first valve regardless of the temperature (T2); is achieved through the natural circulation solar hot water system comprising a.

The present invention also relates to a solar collector for collecting solar heat; A heat storage tank connected through the collector and the collector circulation pipe and performing heat exchange between the working medium in which solar heat is collected and water used for living; A hot water circulation pipe communicating with the heat storage tank and configured to include a hot water inlet pipe through which water is supplied to the heat storage tank, and a hot water discharge pipe through which water is discharged; A connection pipe communicating the hot water inlet pipe and the hot water discharge pipe with each other; A first valve installed in the branch pipe branched from the connection pipe to selectively flow the water in the heat storage tank into the branch pipe by selective opening and closing; A hot water discharge pipe communicating with the hot water discharge pipe; A second valve provided in the middle of the hot water discharge pipe; A circulation pump provided in the connection pipe and configured to circulate water along the hot water inlet pipe and the hot water discharge pipe through the connection pipe; And controlling the opening or closing of the first valve when the water temperature T1 of the heat storage tank reaches a first opening temperature Ta or a first closing temperature Tb, for a predetermined portion of the hot water circulation pipe. When the temperature T2 reaches the operation temperature or the operation stop temperature, the circulation pump is operated or stopped. When the operation time of the circulation pump exceeds the set time, the circulation pump is operated regardless of the temperature T2. It is achieved through a natural circulation solar hot water system comprising a; controller for controlling to stop the operation automatically.

The apparatus may further include a first connection pipe communicated with the hot water discharge pipe through the second valve, and an auxiliary boiler provided in the middle of the first connection pipe.

In addition, the hot water circulation pipe may be provided around the outside of the hot wire to control the operation through the controller according to the change in the temperature (T2).

In addition, when the water temperature T1 of the heat storage tank is greater than the set temperature Te, the controller closes the second valve to supply water to the load side and then turns on the water, and the water temperature T1 of the heat storage tank is turned on. If less than (Te) may be further provided in a state that the lamp is electrically connected after opening the second valve to heat the water is turned off.

In addition, the controller has a water temperature (T1) of the heat storage tank exceeds the first opening temperature (Ta) of the first valve, or the temperature (T2) for a portion of the hot water circulation pipe is set to the first valve of the first valve. An emergency sound output unit for outputting an emergency sound may be further provided when the temperature is less than 2 the opening temperature Tb.

In addition, the first valve may have a first opening temperature Ta of 93 ° C. ≦ Ta ≦ 97 ° C. and a first closing temperature Tb of 88 ° C. ≦ Ta ≦ 92 ° C.

In addition, the first valve has the second opening temperature Ta 'of 1 ° C≤Ta'≤5 ° C and the second closing temperature Tb' of 8 ° C≤Tb'≤12 ° C, and the circulation The pump may have the operation start temperature Tf in a range of 1 ° C. ≦ Tf ≦ 5 ° C. and the operation stop temperature Td in a range of 8 ° C. ≦ Td ≦ 12 ° C.

In addition, the set temperature Te may be in the range of 40 ° C≤Te≤44 ° C.

In addition, the closing of the first valve or the operation stop time of the circulation pump may be performed when more than 3 to 5 minutes (min) based on the opening start time of the first valve or the operation start time of the circulation pump.

According to the present invention, according to the temperature of the hot water circulating pipe and the temperature change of the heat storage tank, by operating the freeze prevention valve appropriately to basically prevent the freezing of the heat storage tank and the hot water discharge pipe, the temperature of the hot water rises above the set temperature or below the set temperature. In the case of falling, the user can easily recognize the emergency situation by voice, and can easily recognize whether the hot water is used by using solar energy or by boiler without consuming energy. It works.

1 is an overall system circuit diagram according to the prior art 1.
2 is a system configuration diagram according to the prior art 2.
3 is a block diagram of a preferred embodiment of the natural circulation solar hot water system according to the first embodiment of the present invention.
Figure 4 is a block diagram showing the flow of hot water and the working medium in the natural circulation solar hot water system according to a first embodiment of the present invention.
5 is a block diagram of a preferred embodiment of the natural circulation solar hot water system according to a second embodiment of the present invention.
Figure 6 is a configuration diagram showing the operation of the valve and the flow of hot water to prevent freezing in the natural circulation solar hot water system according to a second embodiment of the present invention.
7 is a block diagram of a preferred embodiment of the natural circulation solar hot water system according to a third embodiment of the present invention.
8 is a configuration diagram showing the operation of the valve for the freeze protection and the flow of hot water in the natural circulation solar hot water system according to a third embodiment of the present invention.

The terms or words used in the present specification and claims are intended to mean that the inventive concept of the present invention is in accordance with the technical idea of the present invention based on the principle that the inventor can appropriately define the concept of the term in order to explain its invention in the best way Should be interpreted as a concept.

Throughout the specification, when an element is referred to as "comprising ", it means that it can include other elements as well, without excluding other elements unless specifically stated otherwise. Also, the term " part "in the specification means a unit for processing at least one function or operation, which may be implemented by hardware or software or a combination of hardware and software.

Hereinafter, a configuration of an embodiment of a natural circulation solar hot water system according to the present invention will be described in detail with reference to the accompanying drawings.

<First Example >

3 is a block diagram of a preferred embodiment of the natural circulation solar hot water system according to the first embodiment of the present invention, Figure 4 is a hot water and operation in the natural circulation solar hot water system according to the first embodiment of the present invention A schematic diagram showing the flow of media is shown.

According to these drawings, the natural circulation solar hot water system 100 of the present embodiment is largely the collector 110, the heat storage tank 120, the hot water circulation pipe 130, the hot water outlet pipe 136, the controller 140 and the auxiliary boiler. It is a valve drive system including 150.

The collector 110 efficiently collects solar heat, and various types of collectors such as a tube-type and a flat-plate type can be used.

The collector 110 is connected to the collector circulation pipe 112. The collector circulation pipe 112 is a closed pipe not connected to the outside so that a part of the collector circulation pipe 112 is located inside the collector 110. The collector circulation pipe 112 serves as a passage through which a working medium to be described later flows and a working medium circulates through the collector circulation pipe 112 and a portion of the collector circulation pipe 112 located in the collector 110 Absorbs the solar heat collected by the collector 110 and transmits the absorbed solar water to the drinking water to be described later.

Although not shown, a portion of the collector circulation pipe 112 located in the collector 110 is widely distributed inside the collector 110 so that heat collected by the collector 110 can be transferred to the working medium as much as possible. It is desirable to be able to. In order to prevent heat from being transferred to the outside, the collector circulation pipe 112 may be packed with a heat insulating material. In addition, although not shown, the collector circulation pipe 112 may be provided with a circulation pump so that the working medium can smoothly circulate inside the collector circulation pipe 112.

An operating medium (not shown) flows inside the collector circulation pipe 112. The working medium flows through the collector circulation pipe 112 and transfers the heat of the collector 110. The working medium generally uses an antifreeze which does not freeze even at a relatively low temperature.

The heat storage tank 120 is a space where heat exchange between the working medium and living water is performed. The heat storage tank 120 is preferably wrapped with a heat insulating material so that heat is not released to the outside in order to increase the efficiency of heat exchange. At this time, the heat storage tank 120 may be configured as an inner tank and an outer tank surrounding the inner tank, although not shown in the drawing.

At this time, the outer tank is in communication with the collector circulation pipe 112, the inner tank is in communication with the hot water circulation pipe 130. The working medium flowing through the collector circulation pipe 112 transfers heat to the inner tank while flowing into the outer tank, and the heat transferred to the inner tank increases the temperature of living water to become hot water. .

The hot water circulation pipe 130 serves as a passage through which the water used for living, namely, the living water (tap water) supplied from the tap water, moves and the temperature of the water increases in the course of flowing the hot water circulation pipe 130. More specifically, the hot water circulating pipe 130 is heat-exchanged (by conduction) with the working medium, and the living water is heated.

The hot water circulation pipe 130 is an open pipe on both sides, connected to a tap water supplying the living water to one side, and water is introduced therein, and the water temperature rises while passing through the hot water circulation pipe 130 (hot water). Is discharged to the other side and used for living. Hot water inlet pipe 132, the side in which the water is discharged in the heat storage tank 120 to be described later in the hot water circulation pipe 130, the heat discharge tank 120 will be referred to as a hot water discharge pipe 134.

The hot water discharge pipe 134 may be in a relatively high position compared to the hot water inlet pipe 132. This is when the heat storage tank 120 is composed of an inner tank and an outer tank. The hot water stored in the inner tank is to use hot water of a higher temperature because the temperature of the hot water in the relatively high position in the inner tank is higher than the temperature of the hot water in the lower position by the stratification effect. Since the hot water inlet pipe 132 is connected to the water supply, a separate circulation pump is not necessary.

The hot water discharge pipe 134 is provided with a first valve V1. The first valve V1 serves to selectively open and close the hot water discharge pipe 134 as an automatic valve for preventing freezing. More specifically, the first valve (V1) is opened when the temperature (T2) for a portion of the hot water discharge pipe 134 of the hot water circulation pipe 130 drops below a predetermined temperature, the hot water discharge pipe 134 The water stored in the inner tank of the heat storage tank 120 having a relatively high temperature flows. And the heated hot water discharge pipe 134 is gradually heated to the hot water inlet pipe 132 constructed to be in contact.

Water, by its nature, has a larger volume of liquid (ice) than liquid. The hot water circulation pipe 130 is always filled with water, but in the time period (night time) when no water is used, the water inside the hot water circulation pipe 130, in particular, the hot water discharge pipe 134 is placed in a standing state without flowing. . If the living water is frozen by the temperature drop, a phenomenon in which the hot water circulation pipe 130 freezes due to volume expansion occurs.

Therefore, when the temperature of the hot water inlet pipe 132 falls below a predetermined temperature, the water stored in the inner tank of the heat storage tank 120 having a relatively high temperature is more precisely than the hot water circulation pipe 130, and the hot water discharge pipe ( The temperature of the hot water circulation pipe 130 is prevented from being raised by raising the temperature of 134.

At this time, since the temperature of the hot water discharge pipe 134 is relatively low in the portion exposed to the outside air, it is preferable to measure the temperature of the portion of the hot water discharge pipe 132 exposed to the outside air.

The opening degree of the first valve V1 changes in accordance with the temperature change of the hot water inlet pipe 132. That is, as the temperature of the hot water discharge pipe 134 becomes relatively much lower, the temperature of the hot water circulation pipe 130 is increased because a large amount of hot water flows by increasing the opening degree of the first valve V1.

When the temperature T2 of a portion of the hot water discharge pipe 134 rises above a predetermined temperature, the first valve V1 is closed again.

The hot water discharge pipe 136 is branched with the hot water discharge pipe 134 and serves as a passage through which the water existing in the heat storage tank 120 to be described later is discharged through the hot water discharge pipe 134. Although not shown in the drawing, the hot water outlet pipe 136 may be connected to a heavy water tank.

The first connection pipe 138 is branched and communicated with the hot water outlet pipe 136, and a second valve V2 is installed at a branch point of the hot water outlet pipe 136 and the first connection pipe 138. The auxiliary boiler 150 is provided in the middle of the first connection pipe 138.

When the second valve V2 is a 3-way valve and is turned on through the control of the controller 140, the second valve V2 communicates with the hot water outlet pipe 136 and the first connection pipe 138 to supply hot water. When OFF, the hot water outlet pipe 136 communicates to supply hot water to the load side.

The controller 140 may include a first valve V1, a second valve V2, an auxiliary boiler 150, a lamp L, and an emergency sound generator (not shown in the drawing) according to the detected values of the sensors S1 and S2. ) To control the operation. That is, the controller 140 detects the water temperature T1 of the heat storage tank 120 through a sensor S1 for detecting the water temperature T1 of the heat storage tank 120, and the surface of the hot water discharge pipe 134. Detects the surface temperature (T2) of the hot water discharge pipe 134 through the sensor (S2) for detecting the temperature (T2), and compares the temperature (T1, T2) detection value and the set value, the first valve (V1) ), The second valve V2, the auxiliary boiler 150, the lamp L, the ON / OFF of the emergency sound generator (not shown).

At this time, the controller 140 is a low temperature state of the water temperature (T1) of the heat storage tank detected by the sensor (S1), a high temperature state of the temperature (T2) for a predetermined portion of the hot water discharge pipe 134 detected by the sensor (S2). Is controlled by using a single first valve (V1).

On the other hand, the controller 140 may be further electrically connected to the lamp (L), and when heated, the hot water heated by the collected solar light is supplied without passing through the auxiliary boiler 150 to be described later, so that no extra energy is consumed. The user may be notified. At this time, the lamp (L) may be applied to a light emitting diode (LED) and the like, and the color may be provided as green or the like. In addition, the lamp (L) may be installed in the controller 140 main body, otherwise the blinking state should be visible to the naked eye, so that the controller 140 is installed in the living space while communicating with the wired or wireless method. It is preferable, for example, it can be installed in a sink (not shown).

Furthermore, the controller 140 is further provided with an emergency sound output. Here, the emergency sound output unit outputs an emergency sound when the water temperature T1 of the heat storage tank 120 exceeds the set temperature or the temperature T2 of a predetermined portion of the hot water discharge pipe 132 is less than the set temperature to give an emergency to the occupants. It is a voice to recognize the state. At this time, the emergency sound output unit outputs an emergency sound in an emergency situation, so that the water temperature T1 of the heat storage tank 120 rises above the set temperature and prevents overheating, while freezing the pipe due to a failure of the first valve V1 and the like. It is to prevent the phenomenon.

The auxiliary boiler 150 is installed in the middle of the first connection pipe 138 so that when the water temperature T1 of the heat storage tank 120 is lower than the set temperature, the second valve V2 is turned on under the control of the controller 140. The hot water is heated to the set temperature. On the other hand, when the water temperature (T1) of the heat storage tank 120 is higher than the set temperature, the second valve (V2) is turned off through the control of the controller 140 to supply hot water directly to the load side.

On the other hand, the natural circulation solar hot water system 100 of the present embodiment has the advantage that the installation cost is lower than other methods because the valve drive method is applied.

Hereinafter, in the natural circulation solar hot water system 100 according to the first embodiment, the controller 140 may operate the first valve for controlling overheating, freezing, controlling ON duration of the first valve , flashing a lamp , and emergency sound output. V1), the process of controlling the second valve (V2), auxiliary boiler 150, lamp (L) and the emergency sound output.

① Overheat prevention

In order to prevent overheating of the heat storage tank 120, the controller 140 is more preferably provided that Ta = 95 ° C. when the water temperature T1 of the heat storage tank 120 is T1> Ta (93 ° C. ≦ Ta ≦ 97 ° C.). The first valve V1 is controlled to be turned on, and when the water temperature T1 of the heat storage tank 120 is T1 <Tb (88 ° C. ≦ Tb ≦ 92 ° C.), more preferably Tb = 90 ° C. Control to turn off the first valve (V1). Here, Ta represents a first opening temperature and Tb represents a first closing temperature.

When the first valve (V1) is turned on, the water present in the inner tank of the heat storage tank 120 is discharged to the hot water discharge pipe 134 and at the same time of the heat storage tank 120 through the living water (tap water) introduced from the outside The temperature of the water stored in the inner tank also drops.

That is, when the water temperature (T1) of the heat storage tank 120 is T1> Ta (93 ℃ ≤ Ta ≤ 97 ℃) is more preferably raised to Ta = 95 ℃, the controller 140 is the first Turn on the valve (V1) to stop the water supply in the heat storage tank 130, the living water (tap water) continues to flow. Then, when the water temperature (T1) of the heat storage tank 120 is lowered and T1 <Tb (88 ℃ ≤ Tb ≤ 92 ℃), and more preferably lowered to Tb = 90 ℃, the controller 140 is the The first valve V1 is turned off to restart the water supply in the heat storage tank 130.

② Freeze prevention

The controller 140 has a temperature T2 of a predetermined portion of the hot water discharge pipe 134 of the hot water circulation pipe 130 in order to prevent freezing of the hot water circulation pipe 130. ≤5 ° C), more preferably Ta '= 3 ° C to turn on the first valve V1, and the temperature T2 for a portion of the hot water discharge pipe 134 is T2> Tb'. (8 ° C. ≦ Tb '≦ 12 ° C.), more preferably, Tb' = 10 ° C. to control the first valve V1 to be turned off. Here, Ta 'represents the second opening temperature, and Tb' represents the second closing temperature.

When the first valve V1 is turned on, water present in the inner tank of the heat storage tank 120 is discharged to the hot water discharge pipe 134.

That is, when the temperature (T2) for a certain portion of the hot water discharge pipe 134 is T2 <Ta '(1 ℃ ≤ Ta' ≤ 5 ℃) more preferably Ta '= 3 ℃, the controller 140, the first valve (V1) is turned on by the water existing in the heat storage tank 120 is made of heat exchange while passing through the hot water discharge pipe 134 with water of a relatively high temperature and the hot water discharge pipe 134 ) Will increase the temperature and prevent freezing. Then, when the temperature (T2) for a certain portion of the hot water discharge pipe 134 is increased and T2 > Tb '(8 ℃ ≤ Tb' ≤ 12 ℃) more preferably rises to Tb '= 10 ℃, The controller 140 turns off the first valve V1 to restart the water supply inside the heat storage tank 130.

③ of the first valve ON duration

The controller 140 has a case where the ON time of the first valve V1 exceeds a set time [3 to 5 minutes, preferably 4 minutes (min)], and the water temperature T1 of the heat storage tank 120 is When the temperature does not rise to the second closing temperature Tb 'of the first valve V1 even after a set time, the first valve V1 is automatically operated regardless of the temperature T2 of a predetermined portion of the hot water discharge pipe 134. To turn it off.

In this way, by controlling the opening time of the first valve (V1) it can be prevented that too much hot water is discharged through the hot water discharge pipe 134. In addition, even when the water temperature T1 of the heat storage tank 120 does not rise to the second closing temperature Tb 'of the first valve V1 after a set time, a phenomenon in which hot water is discharged may be prevented. On the other hand, the opening time of the first valve (V1) is in the range of 2 minutes to 6 minutes.

④ Lamp blinks

The controller 140, when the water temperature (T1) of the heat storage tank 120 is T1> Te (40 ℃ ≤ Te ≤ 44 ℃) more preferably Te = 42 ℃ when turning off the second valve (V2) (L) is turned on, and when the water temperature (T1) of the heat storage tank 120 is T1 <Te (40 ℃ ≤ Te ≤ 44 ℃), more preferably Te = 42 ℃ second valve (V2) is turned ON While controlling the lamp (L) to turn off.

When the lamp L is in the ON state, when the water temperature T1 of the heat storage tank 120 is greater than 42 ° C., the second valve V2 is turned off and hot water is supplied directly to the load side without passing through the auxiliary boiler 150. Because it becomes. In this way, the user can visually confirm that the lamp L is in the ON state, so that the user can easily recognize that the hot water can be used without the operation of the auxiliary boiler 150.

On the contrary, when the lamp L is in the OFF state, when the water temperature T1 of the heat storage tank 120 is less than 42 ° C., the second valve V2 is turned on while the hot water outlet pipe 136 and the first connection pipe 138 are turned on. The second valve (V2) is in communication with the hot water passes through the auxiliary boiler 150. In this case, the user can visually confirm that the lamp L is in the OFF state. In this case, the user can recognize that the auxiliary boiler 150 needs to be operated to use hot water.

⑤ Emergency sound output

The controller 140 more preferably exceeds Ta = 97 ° C. when the water temperature T 1 of the heat storage tank 120 is T1> Ta (93 ° C. ≤ Ta ≤ 97 ° C.), or the constant of the hot water discharge pipe 134. If the temperature T2 for the portion is T2> Ta '(1 ° C <Ta' <5 ° C), and more preferably Ta '= 1 ° C, the emergency sound is output through the emergency sound output.

For example, when the water temperature T1 of the heat storage tank 120 rises to 95 ° C., the first valve V1 is turned on, and the living water (tap water) should flow in and fall to 95 ° C. or lower. If the temperature rises above 97 ℃ due to a fault, etc., the user can recognize the emergency state through the emergency sound output unit. In this case, when the user opens the hot water faucet (load side) installed in the sink, the hot water is discharged along the hot water discharge pipe 134 and the hot water discharge pipe 136 in communication with each other to temporarily block the temperature rise, thereby temporarily performing emergency treatment. After that, the user can request after sales service (A / S) from the manufacturer.

In addition, when the temperature (T2) for a predetermined portion of the hot water discharge pipe 134 is 3 ℃ or less, the first valve (V1) is to be turned on to prevent freezing, but due to the failure of the first valve (V1), etc. 1 ℃ If falling below the emergency sound output through the user can recognize that the emergency state.

<2nd Example >

5 is a block diagram of a preferred embodiment of the natural circulation solar hot water system according to the second embodiment of the present invention, Figure 6 is a freeze protection in the natural circulation solar hot water system according to a second embodiment of the present invention A schematic diagram is shown showing the operation of the valve and the flow of hot water.

According to these drawings, the natural circulation solar hot water system 200 of the present embodiment is largely the collector 210, heat storage tank 220, hot water circulation pipe 230, hot wire 230 ', hot water outlet pipe 236, the controller The heat collector heating method including the 240 and the auxiliary boiler 250, the collector 210, the heat storage tank 220, hot water circulation pipe 230, hot water outlet pipe 236 and the auxiliary boiler 250 is a first Since the same structure and function as that of the embodiment, detailed description thereof will be omitted.

The hot wire 230 ′ is provided to surround the outside of the hot water circulation pipe 230, more specifically, the hot water inlet pipe 232 and the hot water discharge pipe 234, and the temperature T2 for a predetermined portion of the hot water discharge pipe 234. In accordance with the change of) will be controlled by the controller 240 or not.

In particular, freezing prevention may be implemented by the heating wire 230 ′, and the first valve V1 may perform only an overheating prevention function.

In this case, the heating wire 230 ′ heats the hot water discharge pipe 234 to basically provide additional heat in addition to the heating through the hot water so that the hot water can quickly reach the set temperature, thereby shortening the heating time.

The controller 240 also controls the operation of the heating wire 230 'in addition to the function in the first embodiment, and a relay (R) is placed on the control line to control the power and current of the heating wire 230'. Is installed on.

Furthermore, the controller 240 has a temperature T2 of a predetermined portion of the hot water inlet pipe 232 and the hot water discharge pipe 234 to prevent freezing of the hot water inlet pipe 232 and the hot water discharge pipe 234. In the case of Ta ″ (1 ° C. ≦ Ta ″ ≦ 5 ° C.), when Ta ″ = 3 ° C., the heating wire 230 'is controlled to be turned on, and the temperature (for a predetermined portion of the hot water discharge pipe 234) When T2) is T2> Tb "(8 ° C. ≦ Tb ″ ≦ 12 ° C.), more preferably, when Tb ″ = 10 ° C., the heating wire 230 ′ is turned off. Here, Ta "represents a hot wire operation temperature, and Tb" represents a hot wire operation stop temperature.

If the temperature T2 for a portion of the hot water inlet pipe 232 and the hot water discharge pipe 234 is T2 <Ta "(1 ℃ ≤ Ta" ≤ 5 ℃), more preferably, Ta "= 3 ℃ In this case, the controller 140 turns on the heating wire 230 ′ to heat the hot water circulation pipe 130 and prevent freezing. Then, the temperature T2 of a predetermined portion of the hot water discharge pipe 134. When T2 > Tb " (8 DEG C < Tb " < 12 DEG C), more preferably Tb " = 10 DEG C, the controller 240 turns off the heating wire 230 'so that the heat storage tank ( 130, the hot water inlet pipe 232 and the hot water discharge pipe 234 by the internal water supply.

In the natural circulation solar hot water system 200 of the second embodiment, as in the first embodiment, the controller 240 is configured to control overheating, freezing, heating duration of the heating wire , lamp blinking, and emergency sound output. The first valve V1, the second valve V2, the heating wire 230 ′, the auxiliary boiler 250, the lamp L, and the emergency sound output unit may be controlled.

Reference numeral 212, which is not described herein, is a collector circulation pipe, 232 is a hot water inlet pipe, 234 is a hot water outlet pipe, 238 is a first connection pipe, L is a lamp, and S1 and S2 are sensors.

On the other hand, the natural circulation solar hot water system 200 of the present embodiment is mainly used when the piping is short regardless of the region because the hot wire heating method is applied, the length of the heating wire is short and the power consumption is small when the pipe is short about 1m You lose.

<3rd Example >

7 is a block diagram of a preferred embodiment of the natural circulation solar hot water system according to the third embodiment of the present invention, Figure 8 is a freeze protection in the natural circulation solar hot water system according to a third embodiment of the present invention A schematic diagram is shown showing the operation of the valve and the flow of hot water.

According to these drawings, the natural circulation solar hot water system 300 of the present embodiment is largely the collector 310, the heat storage tank 320, the hot water circulation pipe 330, the connection pipe 335, the hot water outlet pipe 336, the controller 340, the auxiliary boiler 350 and the pump driving method including the circulation pump P, the collector 310, the heat storage tank 320, the hot water circulation pipe 330, the hot water outlet pipe 336 and the auxiliary boiler. 350 has the same structure and function as that of the second embodiment, and thus a detailed description thereof will be omitted. Here, the controller 340, the circulation pump (P) and the first valve (V1) may be provided in a modular form.

The connection pipe 335 communicates the hot water inlet pipe 332 and the hot water discharge pipe 334 with each other so that the water in the heat storage tank 320 circulates inside the hot water inlet pipe 332 and the hot water discharge pipe 334. do. That is, the water of the heat storage tank 320 discharged through the hot water discharge pipe 334 is introduced again to the hot water inlet pipe 334 through the connection pipe 335.

The branch pipe 335 ′ in which the first valve V1 is installed is branched to communicate with the connection pipe 335.

A check valve may be provided at the connection pipe 335. The check valve serves to selectively communicate with the connection pipe 335 to allow only one flow through the connection pipe 335. More specifically, it is to selectively open and close to allow only the flow from the hot water inlet pipe 332 to the hot water discharge pipe 334, or the flow from the hot water discharge pipe 334 to the hot water inlet pipe 332. . In the present embodiment, a case in which the check valve is opened when water flows from the hot water discharge pipe 334 to the hot water inlet pipe 332 will be described by way of example.

A circulation pump P is provided on the connection pipe 335. The circulation pump (P) serves to provide power for the water to flow through the connection pipe (335). In this embodiment, the circulation pump P provides power so that water flows from the hot water discharge pipe 334 to the hot water inlet pipe 332 by way of example.

The circulation pump P is controlled by the controller 340. Let's look at the control of the circulation pump (P) in detail.

According to the present embodiment, the controller 340 is the circulation pump when the temperature T2 of a part of the hot water discharge pipe 334 is T2 <Tf (1 ° C ≤ Tf ≤ 5 ° C) more preferably Tf = 3 ° C (P) is controlled to be turned on, and more preferably when the temperature (T2) for a portion of the hot water discharge pipe 234 is T2> Tg (8 ℃ ≤ Tg ≤ 12 ℃) more preferably Tg = 10 ℃ Control to turn off the circulation pump (P). Here, Tf represents the operation start temperature of the circulation pump, Tg represents the operation stop temperature of the circulation pump. At the temperature between the operating start temperature of the circulation pump 3 ° C. and the operating stop temperature 10 ° C. of the circulation pump, if the circulating pump P is in the ON state, the ON state is maintained. If P) is OFF, it will remain OFF.

When the circulating pump P is operated, water present in the internal tank inside the heat storage tank 320 flows into the hot water inlet pipe 332 through the hot water discharge pipe 334 and the connection pipe 335 and is again It is introduced into the inner tank of the heat storage tank (320). Through such a path to increase the temperature of the hot water discharge pipe 334 and the hot water inlet pipe 332 with water of a relatively high temperature of the inner tank. When the circulating pump P is turned on, the check valve is opened so that water flows through the connection pipe 335. When the operation of the circulation pump P is OFF, the check valve is closed according to the condition, so that water does not flow back through the connection pipe 335.

Here, the operation stop time of the circulation pump (P) is carried out when 3 to 5 minutes, preferably more than 4 minutes (min) based on the operation start time of the circulation pump (P).

In addition, since the controller 340 controls the operation of the circulating pump P in addition to the function of the first embodiment, a relay R controls a control line for applying current and controlling current of the circulating pump P. It is installed on.

In the natural circulation solar hot water system 300 of the third embodiment, as in the first and second embodiments, the controller 340 for overheat prevention, freeze protection, ON duration control of the circulation pump , lamp flashing, and operation of the emergency sound output unit. ) May control the first valve V1, the second valve V2, the auxiliary boiler 350, the lamp L, the circulation pump P, and the emergency sound output unit.

Reference numeral 312, which is not described herein, is a collector circulation pipe, 332 is a hot water inlet pipe, 334 is a hot water outlet pipe, 338 is a first connection pipe, L is a lamp, and S1 and S2 are sensors. On the other hand, the sensor (S2) is exemplified as being installed in the hot water inlet pipe rather than installed in the hot water discharge pipe as in the previous embodiment.

As described above, the present invention has been described by way of limited embodiments and drawings, but the present invention is not limited to the above embodiments, and those skilled in the art to which the present invention pertains various modifications and variations from such descriptions. This is possible.

Therefore, the scope of the present invention should not be limited by the described embodiments, but should be determined by the equivalents of the appended claims, as well as the appended claims.

100, 200, 300: Natural circulation solar hot water system
110, 210, 310: collector
112, 212, 312: collector circulation pipe 120, 220, 320: heat storage tank 130, 230, 330: hot water circulation pipe 132, 232, 332: hot water inlet pipe
134, 234, 334: hot water discharge pipe 136, 236, 336: hot water discharge pipe 138, 238, 338: first connection pipe 140, 240, 340: controller
150, 250, 350: auxiliary boiler 230 ': heating wire
335 connection pipe L: lamp
P: Circulation Pump S1, S2: Sensor
V1, V2: first and second valve

Claims

A collector that collects solar heat;
A heat storage tank connected through the collector and the collector circulation pipe and performing heat exchange between the working medium in which solar heat is collected and water used for living;
A hot water circulation pipe communicating with the heat storage tank and supplied with the water;
A first valve provided at one side of the hot water circulation pipe to selectively flow water in the heat storage tank into the hot water circulation pipe by selective opening and closing;
A hot water outlet pipe communicating with the other side of the hot water circulation pipe;
A second valve provided in the middle of the hot water discharge pipe; And
When the water temperature T1 of the heat storage tank reaches the first opening temperature Ta or the first closing temperature Tb, the first valve is controlled to open or close, and the temperature of a predetermined portion of the hot water circulation pipe When the T2 reaches the second opening temperature Ta 'or the second closing temperature Tb', the first valve is opened or closed, and when the opening time of the first valve exceeds the set time, the temperature is opened. And a controller for automatically closing the first valve irrespective of T2.

A collector that collects solar heat;
A heat storage tank connected through the collector and the collector circulation pipe and performing heat exchange between the working medium in which solar heat is collected and water used for living;
A hot water circulation pipe communicating with the heat storage tank and configured to include a hot water inlet pipe through which water is supplied to the heat storage tank, and a hot water discharge pipe through which water is discharged;
A connection pipe communicating the hot water inlet pipe and the hot water discharge pipe with each other;
A first valve installed in the branch pipe branched from the connection pipe to selectively flow the water in the heat storage tank into the branch pipe by selective opening and closing;
A hot water discharge pipe communicating with the hot water discharge pipe;
A second valve provided in the middle of the hot water discharge pipe;
A circulation pump provided in the connection pipe and configured to circulate water along the hot water inlet pipe and the hot water discharge pipe through the connection pipe; And
When the water temperature T1 of the heat storage tank reaches the first opening temperature Ta or the first closing temperature Tb, the first valve is controlled to open or close, and the temperature of a predetermined portion of the hot water circulation pipe When the T2 reaches the operation temperature or the operation stop temperature, the circulation pump is operated or stopped. When the operation time of the circulation pump exceeds the set time, the circulation pump is automatically operated regardless of the temperature T2. A controller for controlling to stop the operation with; Natural circulation type solar hot water system comprising a.

3. The method according to claim 1 or 2,
The natural circulation type solar hot water system further comprises a first boiler connected to the hot water outlet pipe to open and close through the second valve and the auxiliary boiler provided in the middle of the first connection pipe.

The method of claim 1,
The hot water circulation pipe is a natural circulation type solar hot water system, the heating wire is provided around the outside to control the operation through the controller in accordance with the change of the temperature (T2).

3. The method according to claim 1 or 2,
When the water temperature T1 of the heat storage tank is greater than the set temperature Te, the controller closes the second valve to supply water to the load side and then turns on the water, and the water temperature T1 of the heat storage tank is set to the set temperature Te. Less than), the natural circulation type solar hot water system further includes a lamp for electrically turning off the lamp after opening the second valve to heat the water.

3. The method according to claim 1 or 2,
In the controller, the water temperature T1 of the heat storage tank exceeds the first opening temperature Ta of the first valve, or the temperature T2 for a portion of the hot water circulation pipe is opened in the second valve of the first valve. The natural circulation solar hot water system further comprises an emergency sound output unit for outputting an emergency sound when the temperature is below Ta '.

3. The method according to claim 1 or 2,
The first valve is a natural circulation solar hot water system wherein the first opening temperature (Ta) is 93 ℃ ≤ Ta ≤ 97 ℃ range, the first closing temperature (Tb) is 88 ℃ ≤ Tb ≤ 92 ℃ range.

3. The method according to claim 1 or 2,
The first valve has the second opening temperature Ta 'of 1 ° C≤Ta'≤5 ° C and the second closing temperature Tb' of 8 ° C≤Tb'≤12 ° C,
The circulation pump for circulating the water in the heat storage tank is a natural circulation type solar hot water system, the operation start temperature (Tf) is 1 ℃ ≤ Tf ≤ 5 ℃ range and the operating stop temperature (Td) is 8 ℃ ≤ Td ≤ 12 ℃ range.

6. The method of claim 5,
The set temperature (Te) is a natural circulation type solar hot water system, 40 ℃ ≤ Te ≤ 44 ℃ range.

3. The method according to claim 1 or 2,
Closing of the first valve or operation stop time of the circulation pump is a natural circulation solar hot water that is carried out when more than 3 to 5 minutes (min) based on the opening start time of the first valve or the operation start time of the circulation pump. system.