KR101376059B1 - Natural circulation type hot-water supply system using solar heat for local heating - Google Patents

Abstract

The present invention relates to a natural circulation type hot water supply system using solar heat for local heating. The present invention comprises a solar heat collector for collecting solar heat; a solar energy collector circulation pipe connected to the solar energy collector to allow a working fluid to circulate inside; a heat storage tank in which the working fluid exchanges heat with water for living; a hot water circulation pipe which is connected to the heat storage tank and which comprises a hot water intake pipe for supplying water to the heat storage tank and a hot water discharge pipe for discharging water; a joint pipe for connecting the hot water intake pipe to the hot water discharge pipe; a check valve on the joint pipe to selectively open or close the joint pipe; a circulation pump on the joint pipe to allow water inside the heat storage tank to circulate through the joint pipe; a controller for controlling the operation of the circulation pump to prevent the hot water circulation pipe from freezing and bursting; and a local heating medium operated by hot water supplied according to the opening and closing operation of the joint pipe. The natural circulation type hot water supply system according to the present invention enables local heating by allowing hot water heated by solar heat to be used for its main purpose, to be used for freeze protection using only a small part of the hot water, and to be supplied to a detachable indoor hot water mat; and increases the temperature of water using an auxiliary heater installed on a hot water intake hose when the temperature of the heat storage tank is lower than the lowest heating temperature. [Reference numerals] (AA) Outdoor; (BB) Indoor

Description

Natural circulation type solar hot water system with local heating {NATURAL CIRCULATION TYPE HOT-WATER SUPPLY SYSTEM USING SOLAR HEAT FOR LOCAL HEATING}

The present invention relates to a naturally-circulating solar hot water system capable of local heating, and more particularly, to a naturally-circulating solar hot water system capable of local heating using a solar water heater as a main purpose and using only a part of heat for local heating. It is about.

In recent years, as an alternative to petroleum resources, technologies that generate electricity using solar heat or apply hot water systems have been increasing. In accordance with this trend, solar hot water systems that produce hot water using solar heat have been widely commercialized.

A technology related to such a solar hot water system has been proposed in Patent Registration No. 1203033.

Hereinafter, the system structure disclosed in the patent registration No. 1203033 as a prior art will be briefly described.

FIG. 1 is a schematic view of a natural circulation type solar hot water system according to the prior art. Referring to FIG. 1, although the hot wire method is mainly used for preventing frost damage, the power consumption is very high during the winter when the temperature is falling below zero, and the hot wire is broken during frequent operation, In order to solve this problem, a 'hot water tracing method' using an automatic valve or a pump has been proposed in the prior art.

The structure for implementing the 'hot water tracing method' described in the related art includes a collector 110 for collecting solar heat; A condenser circulation pipe 115 connected to the collector 110 and circulating the working medium through which the solar heat collected by the collector 110 is accumulated; A heat storage tank (130) for performing heat exchange between the working medium and water used for living; A hot water circulation pipe (120) communicating with the heat storage tank (130) and supplied with the water; A frost prevention valve 125 "provided at one side of the hot water circulation pipe 120 and selectively opened and closed to selectively flow water of the thermal storage tank 130 into the hot water circulation pipe 120, The operation of the freeze prevention valve 125 " is controlled according to a temperature change of at least one of a temperature T1 of a certain portion of the hot water circulation pipe 120 and a water temperature T2 of the heat storage tank, Wherein when the temperature T1 of the certain portion of the hot water circulation pipe 120 is T1 < Ta (3 deg. C &lt; Ta &lt; 6 deg. C), the controller When the temperature T1 of the certain portion of the hot water circulation pipe 120 and the water temperature T2 of the thermal storage tank 130 satisfy the following conditions 1) and 2) And closes the prevention valve 125 &quot;.

However, a lot of users of the solar water heaters are looking for heating, and if the capacity of the water heater is adjusted, it is not enough for indoor heating. If the capacity is adjusted to the heating, there is a problem that the heat is left over in summer.

KR 1203033 B1

An object of the present invention is to solve the problems of the prior art as described above, by using hot water by solar heat as the main purpose and to use a very part of the hot water to prevent freezing, or by supplying a removable hot water mat provided in the room It is to provide a natural circulation solar hot water system capable of local heating.

In addition, another object of the present invention is to provide a natural circulation solar hot water system capable of providing a structure so that it can be connected to a hot water mat without changing the building structure.

Further, another object of the present invention is to provide a naturally-circulating solar hot water system capable of local heating, which makes it possible to easily recognize a local heating possible state to a user (resident) of the room.

In addition, another object of the present invention is to provide a natural circulation type solar hot water system that can increase the temperature of water when the heat storage tank temperature is lower than the heating minimum temperature because the auxiliary heater is installed in the hot water inlet hose.

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 collector circulation pipe connected to the collector and configured to circulate a working medium in which solar heat collected by the collector is accumulated therein; A heat storage tank in which heat exchange is performed between the working medium 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 check valve provided in the connection pipe to selectively open and close the connection 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; A controller for controlling the operation of the circulation pump according to the temperature change of the temperature (T1) of the hot water inlet pipe to prevent freezing of the hot water circulation pipe; And a local circulation type solar hot water system capable of local heating, including a local heating medium operated by hot water supplied through open / close control of the connection pipe.

In addition, the controller, when the temperature (T1) for a portion of the hot water inlet pipe is lower than the set lower limit value, turn on the circulation pump, the ON time is more than a predetermined time or the temperature (for a portion of the hot water inlet pipe ( When T1) is equal to or higher than a set upper limit value, the circulation pump can be turned off.

The set lower limit may be 2 to 4 ° C., the predetermined time may be 3 to 5 minutes, and the set upper limit may be 9 to 11 ° C.

In addition, the local heating medium is connected to both ends of the connection pipe between the automatic valve is installed between, respectively, is installed at the end connected to the connection hoses can be operated by the operation of the switch.

In addition, the switch may be further provided with recognition means so as to recognize the heating possible state when the internal temperature (T2) of the heat storage tank is above the heating minimum temperature.

In addition, the auxiliary hose may be further provided at one end of the connection hose to the hot water introduced to heat when the internal temperature of the heat storage tank is lower than the heating minimum temperature.

In addition, the local heating medium may be connected to the end of the connection hose connected to the local heating space through a removable connector.

According to the present invention, hot water by solar heat is used for the main purpose and very little hot water is used to prevent freezing, or by supplying to a detachable hot water mat provided in the room, local heating is possible, and hot water without changing the building structure is required. The structure can be provided to connect to the mat, and the local heating can be easily recognized by the user (resident) of the room, and the auxiliary heater is installed in the hot water inlet hose, so that the water temperature is lowered when the heat storage tank temperature is lower than the minimum heating temperature. There is an effect that can be eliminated by raising.

1 is a schematic diagram of a solar hot water system according to the prior art.
Figure 2 is a schematic diagram showing the structure of the natural circulation solar hot water system capable of local heating according to the present invention.
Figure 3 is an enlarged view showing the connection state of the local heating medium in the natural circulation solar hot water system capable of local heating according to the present invention.
Figure 4 is a block diagram showing the operation of the local heating medium and the flow of hot water in the natural circulation solar hot water system capable of local heating according to 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 &quot;, it means that it can include other elements as well, without excluding other elements unless specifically stated otherwise. Also, the term " part "in the description 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, with reference to the drawings will be described in detail the configuration of an embodiment for a natural circulation solar hot water system capable of local heating according to the present invention.

2 is a schematic view of a structure of a natural circulation solar hot water system capable of local heating according to the present invention, and FIG. 3 is a connection state of a local heating medium in a natural circulation solar hot water system capable of local heating according to the present invention. 4 is shown in an enlarged view, and FIG. 4 is a configuration diagram showing the operation of the local heating medium and the flow of hot water in the natural circulation solar hot water system capable of local heating according to the present invention.

According to these drawings, the natural circulation solar hot water system 100 capable of local heating according to the present invention includes a collector 110, a hot water circulation pipe 120, a connection hose 128, a heat storage tank 130, a local heating medium ( 140), the controller (C), the circulation pump (P) and the first, second temperature sensors (S1, S2) is configured to include.

Here, the collector 110, a part of the hot water circulation pipe 120, the heat storage tank 130 and the first temperature sensors (S1, S2) are located outdoors, the circulation pump (P), the connection hose 128, local heating medium 140 and controller C are preferably located outdoors.

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 circulation pipe 112 is a closed pipe connected to the collector 110 and not connected to the outside, and 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.

Here, the collector circulation pipe 112 is composed of a collector inlet pipe and a collector outlet pipe. The collector pipe is provided at a relatively higher position than the collector inlet pipe, the water flows into the collector inlet pipe, It can be seen that the hot water flows.

Although not shown, a portion located in the collector 110 of the collector circulation pipe 112 may be widely distributed inside the collector 110 so that heat collected by the collector 110 may be transferred to the working medium as much as possible. It is desirable 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.

A working 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 hot water circulation pipe 120 serves as a passage through which water used in daily life, that is, domestic water (tap water) supplied from the tap water, moves.

The hot water circulating pipe (120) is connected to a water supply pipe for supplying the domestic water to one side by piping having open sides, and the domestic water (hot water) whose temperature has risen while passing through the hot water circulating pipe It is discharged to the other side and used for living. The hot water inlet pipe 122 and the hot water outlet pipe 124 are connected to the hot water circulation pipe 120 through the hot water discharge pipe 124, I will. A first temperature sensor S1 is installed in the middle of the hot water inlet 122 to sense the temperature of the hot water inlet 122 and provides the sensed value to the controller C. [

The hot water discharge pipe 124 may be located at a relatively higher position than the hot water inlet pipe 122. Since the hot water inlet 122 is connected to the water supply, a separate circulation pump is not required.

The connection pipe 126 serves to connect the hot water inlet pipe 122 and the hot water discharge pipe 124 with each other and the water in the heat storage tank 130 is connected to the hot water inlet pipe 122 through the connection pipe 226, And the hot water discharge pipe (124). That is, the water of the heat storage tank 130 discharged through the hot water discharge pipe 124 flows into the hot water inlet pipe 122 through the connection pipe 126.

The connection pipe 126 is provided with a check valve (CV). The check valve CV selectively connects the connection pipe 126 and allows only one flow through the connection pipe 126. More specifically, it selectively opens and closes only the flow from the hot water inlet pipe 122 to the hot water discharge pipe 124, or from the hot water discharge pipe 124 to the hot water inlet pipe 122 only. In this embodiment, a case where the check valve CV is opened while the water flows from the hot water discharge pipe 124 to the hot water inlet 122 will be described as an example.

The circulation pump P is installed on the connection pipe 126 and serves to provide power for flowing water through the connection pipe 126. In the present embodiment, a case where the circulation pump P provides power to flow the water from the hot water discharge pipe 124 to the hot water inlet pipe 122 will be described as an example.

The connection pipe 126 is provided with an automatic valve AV3. The automatic valve AV3 is normally open, but when the output signal of the switch SW installed inside the room is input to realize local heating, the automatic valve AV3 is closed through the control signal of the controller C to supply hot water to the local heating medium 140. ) Function to supply.

On the other hand, the connection hose 126 is connected to both sides of the connection hose 128, respectively, starting from the automatic valve AV3. The connection hose 128 is provided with a hot water inlet hose 128a and a hot water discharge hose 128b. The hot water inlet hose 128a is connected to the right side (refer to FIG. 4) starting from the automatic valve AV3 so that hot water to be supplied to the local heating medium 140 is introduced, and the hot water discharge hose 128b is automatically The hot water circulated to the left side (see FIG. 4) starting from the valve AV3 and supplied to the local heating medium 140 is discharged from the local heating medium 140.

Further, automatic valves AV1 and AV2 which are normally closed during the hot water inlet hose 128a and the hot water discharge hose 128b and open when the switch SW to be described later are turned on are provided.

Particularly, in the hot water inlet hose 128a, auxiliary heaters (not shown) are additionally provided on the front and rear sides of the automatic valve AV2, so that the internal temperature T2 of the heat storage tank 130 If the heating temperature is lower than the minimum heating temperature, the heated water can be heated to a temperature higher than the heating minimum temperature.

The heat storage tank 130 is a horizontally-shaped space for heat exchange between the working medium and domestic water. The heat storage tank 130 is preferably wrapped with a heat insulating material so that heat is not discharged to the outside in order to increase efficiency of heat exchange. The thermal storage tank 130 is largely composed of an inner tank and an outer tank that surrounds the inner tank. Although not shown in the drawings, the inner tank and the outer tank are not communicated with each other, and a predetermined space is formed between the inner tank and the outer tank so that the working medium can flow.

Furthermore, the outer tank communicates with the heat collector circulation pipe 112, and the inner tank communicates with the hot water circulation pipe 120. The working medium that has flowed through the collector circulation pipe 112 flows into the inside of the outside tank and transfers heat to the inside tank while the heat transferred to the inside tank increases the temperature of the domestic water to become hot water.

Meanwhile, a second temperature sensor S2 is installed in the inner tank of the thermal storage tank 130 to sense the temperature inside the inner tank, and provides a sensing value to the controller C.

The local heating medium 140 is a hot water mat operated by hot water supplied through opening and closing control of an automatic valve AV3 installed in the connecting pipe 126, and a connection hose 128 connected to a local heating space (inner wall of the room in which the user lives). It is connected to the end of via a removable connector (not shown in the figure).

That is, the connection hose 128 is connected to the room inner wall of the room from the connection pipe 126 connected to the hot water circulation pipe 120, the local heating through the plug-in connector at the end located in the room wall Connect the media 140. As such, the local heating medium 140 is connected to the connection hose 128 by a connector so that the connection hose 128 and the hot water mat are easily connected or separated even when the water is filled with water, so that the water does not leak.

The controller C controls the circulation pump P by receiving signals from the first and second temperature sensors S1 and S2. Hereinafter will be described in detail the control of the circulation pump (P).

According to the present embodiment, the controller C turns on the circulating pump P when the sensing temperature T1 of the first temperature sensor S1 installed at a predetermined portion of the hot water inlet pipe 122 is lower than or equal to a set lower limit. When the ON time of the circulation pump P becomes longer than a predetermined time or the sensing temperature T1 of the first temperature sensor S1 is equal to or greater than a set upper limit value, the circulation pump P is turned off. Here, the set lower limit for the ON of the circulation pump P is 2-4 ° C (preferably 3 ° C), and the set upper limit for the OFF of the circulation pump P is 9-11 ° C (preferably 10 ° C). ), The ON time range of the circulation pump (P) for the OFF of the circulation pump (P) is 3 to 5 (preferably 4 minutes).

When the circulation pump P is operated, the water in the inner tank of the thermal storage tank 130, more specifically, the inner storage tank 130 flows through the hot water discharge pipe 124 and the connection pipe 126, (122) and then flows into the inner tank of the heat storage tank (130). The temperature of the hot water discharge pipe 124 and the temperature of the hot water inlet pipe 122 are increased by the relatively high temperature water of the inner tank. At this time, when the circulation pump (P) is operated, the check valve (CV) is opened and water flows through the connection pipe (126).

Thereafter, when the temperature of the hot water discharge pipe 124 is sensed by the first temperature sensor S1 and reaches the set upper limit value, the controller C stops the operation of the circulation pump P. When the operation of the circulation pump P is stopped, the check valve CV is closed according to the condition, and water does not flow back through the connection pipe 126.

In this way, not only the temperature of the hot water inlet pipe 122 but also the temperature of the water inside the heat storage tank 130 are adjusted to meet each other's conditions. At this time, since the amount of power for the operation of the circulation pump (P) is consumed less than that of operating the heating wire, the efficiency is better, and it is possible to obtain the same effect as preventing the freezing wave by flowing tap water in winter, and thus relatively low temperature. In the separate heat storage tank 130 does not have to be heated.

In this way, the water inside the heat storage tank 130 is circulated through the connecting pipe 126 to the inside of the hot water discharge pipe 124 and the hot water inlet pipe 122, so that the frozen wave of the solar hot water system 100 The efficiency is improved, and the maintenance cost is reduced.

Further, the controller C controls the local heating medium 140 when the internal temperature T2 of the heat storage tank sensed by the second temperature sensor S2 installed in the heat storage tank 130 is equal to or higher than a heating minimum temperature. The control means so that the recognition means (not shown in the figure) of the switch SW is operated. That is, the controller C of the local heating medium 140 when the internal temperature T2 of the heat storage tank sensed by the second temperature sensor S2 is equal to or higher than the heating minimum temperature (24 to 26 ° C., preferably 25 ° C.). By operating the recognition means of the switch (SW) for controlling the operation is to inform the user of the local heating possible state. At this time, the recognition means may be applied to the LED that the user can visually recognize the heating state or the speaker that the user can recognize the heating state visually.

Therefore, the operation sequence of the natural circulation solar hot water system capable of local heating according to the present invention is as follows.

The hot water stored in the heat storage tank 130 passes through the inlet pipe 122 which is heated by the solar heat collected in the heat collector 110 and then flows into the hot water discharge pipe 124 due to the circulation pump P installed in the connection pipe 126, . At this time, the automatic valve AV3 provided on the connection pipe 126 is in the open state, and the hot water inlet pipe 122 and the hot water discharge pipe 124, which are the outdoor side pipes of the hot water in the thermal storage tank 130, To the heat storage tank to prevent the freezing.

Next, when the user (resident) wants to perform local heating through the hot water mat which is the local heating medium 140 provided in the room, the hot water mat is connected to the connection hose 128 through the connector. On the other hand, the user is in a state of recognizing that the temperature of the heat storage tank 130 is capable of local heating through the recognition means (LED lighting, etc.) of the switch SW installed inside the room.

Next, in the state where local heating is possible, when the user operates the switch SW installed in the room, the automatic valve AV3 is closed and the normally closed automatic valves AV1 and AV2 are opened and the circulation pump P is opened. It is turned on to supply hot water of the heat storage tank 130 to the hot water mat. Here, the hot water supplied from the heat storage tank 130 is a hot water inlet pipe 122, the connection pipe 126, hot water inlet hose 128a, hot water mat, hot water discharge hose 128b, hot water discharge pipe 124 in sequence It is returned to the heat storage tank 130 through.

Next, when the use of the hot water mat is unnecessary, when the switch SW is operated and turned off, the automatic valve AV3 is opened, and the open automatic valves AV1 and AV2 are closed, while the hot water discharge pipe 124 is connected to the connecting pipe 126. ), And then separate the hot water mat from the connection hose (128).

While the invention has been shown and described with reference to certain preferred embodiments thereof, it will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. 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: natural circulation solar hot water system
110: Collector 120: Hot water circulation pipe
128: connecting hose 130: heat storage tank
140: local heating medium C: controller
P: circulation pump S1, S2: 1st, 2nd temperature sensor

Claims (7)

A collector that collects solar heat;
A collector circulation pipe connected to the collector and configured to circulate a working medium in which solar heat collected by the collector is accumulated therein;
A heat storage tank in which heat exchange is performed between the working medium 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 check valve provided in the connection pipe to selectively open and close the connection 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;
A local heating medium operated by hot water supplied through opening / closing control of the connecting pipe; And
And a controller for controlling the operation of the circulation pump according to the temperature change of the temperature T1 of the hot water inlet pipe to prevent freezing of the hot water circulation pipe.
2. The apparatus of claim 1,
When the temperature (T1) for a portion of the hot water inlet pipe is less than the set lower limit value, the circulation pump is turned on, the ON time is longer than a predetermined time, or the temperature (T1) for a certain portion of the hot water inlet pipe is set upper limit value If it is abnormal, the natural circulation solar hot water system capable of local heating to turn off the circulation pump to prevent freezing.
3. The method of claim 2,
The set lower limit is 2 to 4 ° C., the predetermined time is 3 to 5 minutes, and the set upper limit is 9 to 11 ° C. A natural circulation type solar hot water system capable of local heating.
The method of claim 1,
The local heating medium is naturally circulating solar heat capable of local heating, which is connected to both sides of the connecting pipe with an automatic valve interposed therebetween, and is installed at the end connected to the connecting hoses and operated by operation of a switch. Hot water system.
5. The method of claim 4,
Wherein the switch is a natural circulation type solar hot water system capable of local heating is further provided with a recognizing means to recognize the heating possible state when the internal temperature (T2) of the heat storage tank is above the heating minimum temperature.
5. The method of claim 4,
A natural circulation type solar hot water system capable of local heating, further comprising an auxiliary heater which is further provided at one end of the connection hose into which hot water is introduced and heats when the internal temperature of the heat storage tank is lower than the minimum heating temperature.
5. The method of claim 4,
The local heating medium is a natural circulation type solar hot water system capable of local heating is connected to the end of the connection hose connected to the local heating space through a removable connector.

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