WO2016099172A1

WO2016099172A1 - Household heating and hot-water supply apparatus applied to district and central heating, and return water temperature control method

Info

Publication number: WO2016099172A1
Application number: PCT/KR2015/013861
Authority: WO
Inventors: 김시환; 허창회; 송용민
Original assignee: 주식회사 경동나비엔
Priority date: 2014-12-19
Filing date: 2015-12-17
Publication date: 2016-06-23
Also published as: KR101654743B1; KR20160074887A

Abstract

A heating and hot-water supply apparatus of the present invention comprises: a heating-side return water temperature sensor for sensing the heating-side return temperature of heating water returning through a heating-side supply pipe, a heating-side return pipe, a hot-water supply side supply pipe, a hot-water supply side return pipe, a direct water pipe, a hot-water pipe, and a heating-side return pipe; a heating-side flowrate regulating valve for regulating the flowrate of the heating water returning through the heating-side return pipe; a hot-water supply side return water temperature sensor for sensing the hot-water supply side return temperature of the heating water returning through the hot-water supply side return pipe; a hot-water supply side flowrate regulating valve for regulating the flowrate of the heating water returning through the hot-water supply side return pipe; and a control unit for controlling the opening degree of the heating-side flowrate regulating valve such that the heating-side return water temperature corresponds to a set heating-side return water temperature, and controlling the opening degree of the hot-water supply side flowrate regulating valve such that the hot-water supply side return water temperature corresponds to a set hot-water supply side return water temperature.

Description

Generational heating and hot water supply and return temperature control methods for regional and central heating

The present invention relates to a generational heating and hot water supply apparatus and a return temperature control method applied to local and central heating, and more particularly, to minimize energy loss by improving heat exchange efficiency of heating water used for heating and hot water supply. The present invention relates to a generational heating and hot water supply device and a return temperature control method applied to local and central heating.

In recent years, apartment complexes and medium-sized buildings have been equipped with common heating facilities for the entire complex, rather than individual heating and individual hot water supply systems, and supply heating hot water to each household or floor through a common pipe network. After heating the water to the proper temperature that requires water through heat exchange between the hot water and the water supply, the system is constructed by regional and central heating system that supplies each household or each floor through a pipe network.

The piping structure connected to each individual household for existing district and central heating is composed of a four-pipe type equipped with a heating water supply pipe, a heating return pipe, a heating water supply pipe for a hot water supply, and a heating return pipe for a hot water supply. However, while the four-pipe type can simultaneously use heating and hot water, it is expensive to maintain and install a new installation, and recently, the heating water supply pipe and the heating return pipe which allow the supply and return of the heating water from the heat source are made. There is a trend to use a two-pipe heating hot water supply device consisting of two pipes.

As an example of such a two-pipe heating hot water supply device, Figure 1 is a view showing the heating hot water supply device disclosed in Korea Utility Model Registration No. 20-471736.

The conventional heating hot water supply device shown in FIG. 1 includes a heat exchanger 11 provided for supplying hot water to one side of a heating water pipe 1 to which heating water is supplied, and provided for each generation; A three-way valve (6) provided on a line of the heating water pipe (1) to select a heating water supply to the heat exchanger (11); A hot water tapping pipe 17 connected to the heat exchanger 11 and tapping hot water; A direct water pipe 18 connected to the heat exchanger 11 at a position adjacent to the hot water tapping pipe 17 and supplied with water directly; A hot water mixing valve 13 disposed at an intersection point at which the hot water tapping pipe 17 and the direct water pipe 18 are connected to mix hot water with direct water; A flow rate detector (14) provided on a line of the straight pipe (18) for detecting a flow rate of the straight water flowing along the straight pipe (18); A heating water supply distributor 5 connected to the heat exchanger 11; A heating water return distributor (9) connected to the heating water return pipe (2) to which the heating water is returned, and connected to the heating water supply distributor (5) by a plurality of connection lines (7); A hot water bypass valve 10 disposed between the heating water supply distributor 5 and the heating water return distributor 9 to bypass hot water; And a controller 19 for controlling the operation of the three-way valve 6, the hot water mixing valve 13, and the hot water bypass valve 10 based on the information detected by the flow rate sensor 14 when hot water is used. )

According to such a conventional two-pipe heating hot water supply device, there is a problem that the simultaneous use of heating and hot water is limited. That is, the three-way valve (6) is provided on the line of the heating water pipe (1), the heating water supplied through the heating water pipe (1) any one of the heat exchanger (11) and the heating water supply distributor (5). It is to be supplied in the direction of the only problem occurs that the operation of the heating is stopped when using hot water during heating operation.

On the other hand, in the case of local and central heating systems, the heat source is supplied through the supply pipe at a time, and each household receives the heat source and uses it as a heat source for heating and hot water, and the heat source is returned to the local and central heating system through the return pipe. It is.

Due to the piping system, the length of the supply and return pipe of the main heat source is longer than that of the individual heating system, and thus heat loss occurs. In order to minimize heat loss due to pipe length and insulation, local and central heating systems require and recommend that the temperature recovered for the generation return temperature and the main return temperature be below a certain temperature. The heating and hot water of FIG. The supply apparatus does not include a configuration capable of controlling the return temperature below a certain temperature.

In response to these demands, various methods for reducing the return temperature have been tried and applied. Regarding household heating, it is common to install a valve for limiting the maximum flow rate of heating of a household or limiting the maximum flow rate of each room. However, these installations may not reflect the insulation conditions and seasonal changes, so that the heating may not be smooth, and complaints about heating complaints may occur.

As another method for lowering the return temperature, a method of using a generational hot water heat exchanger is also used. That is, the heating supply piping line for each generation is used for heating supply through the hot water heat exchanger of each generation. However, this method has the effect of lowering the temperature only when hot water is used in the household. Also, since the heating supply temperature is supplied to the household according to the amount of hot water used, the heating supply temperature of the household is low, which may result in poor heating. have.

Alternatively, check the heating return temperature and if the heating return temperature is high, the heating water flows through the hot water heat exchanger into the main return pipe to lower the main return temperature, or the hot water pipe is heated to preheat the hot water pipe to a constant temperature. It is also proposed and applied. However, this method also has a disadvantage in that the main return temperature cannot be lowered when the hot water is not used in the generation or the hot water pipe is sufficiently preheated.

The present invention has been made in order to solve the above problems, after using the high temperature water supplied from the heat source supply unit for heating and hot water supply in the heating and hot water supply for each generation to return the water of the lowest possible temperature to the heat source supply unit The purpose is to provide a generational heating and hot water supply device and a return temperature control method applied to local and central heating, which can minimize energy loss.

Generation-specific heating and hot water supply device 200 is applied to the regional and central heating according to an embodiment of the present invention for realizing the object as described above, the heating water heated in the heat source supply unit 100 as a heating source A heating side supply pipe 203 for supplying; A heating-side return pipe 204 for returning the heating water that has undergone heat exchange at the heating source to the heat source supply unit 100; Hot water supply side supply pipe 205 for supplying the heating water heated in the heat source supply unit 100 to the hot water supply heat exchanger (210); Hot water supply side return pipe (206) for returning the heating water heat exchanged with the hot water in the hot water supply heat exchanger 210 to the heat source supply unit (100); Direct water pipe 207 is introduced into the direct water; A hot water pipe 208 for direct water supplied through the hot water pipe 207 to be supplied to a user after heat exchange with heating water supplied from the hot water heat exchanger 210 through the hot water supply side supply pipe 205; A heating-side return temperature sensor 253 for detecting a heating-side return temperature of the heating water returned through the heating-side return pipe 204; A heating side flow control valve 261 for adjusting a flow rate of the heating water returned through the heating side return pipe 204; A hot water supply side return temperature sensor 254 for detecting a hot water supply side return temperature of the heating water returned through the hot water supply side return pipe 206; Hot water supply side flow control valve 262 for adjusting the flow rate of the heating water is returned through the hot water supply side return pipe (206); And controlling the opening degree of the heating-side flow rate control valve 261 so that the heating-side return temperature corresponds to a heating-side set return temperature, and the hot-water supply side return temperature corresponds to the hot-water setting side return water temperature. And a control unit for controlling the opening degree of 262.

The heating-side set return temperature is set within a range between an upper limit value and a lower limit value, and when the heating-side return temperature exceeds the upper limit of the heating-side set return temperature, the control unit determines that the heating-side return temperature is the heating-side set return temperature. It is characterized in that the control to reduce the opening degree of the heating-side flow rate control valve 261 until the temperature becomes.

When the heating-side return temperature is less than the lower limit of the heating-side set return temperature range, the control unit is characterized in that the opening degree of the heating-side flow control valve 261 is controlled to increase.

The hot water supply side set return temperature is set within a range between an upper limit value and a lower limit value, and when the hot water supply side return temperature exceeds an upper limit of the hot water supply side set return temperature, the controller controls the hot water supply side return temperature to the hot water supply side set return temperature. It characterized in that the control to reduce the opening degree of the hot water supply side flow control valve 262 until the temperature becomes.

When the hot water supply side return temperature is less than the lower limit of the hot water supply side set return temperature range, the controller is characterized in that the opening degree of the hot water supply side flow control valve 262 is controlled to increase.

In the method for controlling the return temperature of the heating and hot water supply apparatus for each generation applied to local and central heating according to an embodiment of the present invention, the heating water heated in the heat source supply unit 100 may be used simultaneously for the heating and hot water supply for each generation. Operating the heater 200a in the generational heating and hot water supply device 200 configured to be operated; Completely opening the heating-side flow rate control valve 261 for controlling the flow rate of the heating water returned to the heat source supply unit 100 after the heating water heated in the heat source supply unit 100 passes through the heating source; Detecting a heating-side return temperature from the heating-side return temperature sensor 253 provided in the heating-side return pipe 204 for returning the heating water to the heat source supply unit 100; Comparing the heating-side return temperature with the heating-side set return temperature; And when the heating-side return temperature exceeds the upper limit of the heating-side set return temperature, the opening degree of the heating-side flow control valve 261 is reduced until the heating-side return temperature becomes the heating-side set return temperature. It comprises a control step.

In the step of comparing the heating-side return temperature with the heating-side set return temperature, when it is detected that the heating-side return temperature is less than the lower limit of the heating-side set return temperature, the opening degree of the heating-side flow control valve 261 is determined. It characterized in that the control to increase.

According to another embodiment of the present invention, the method for controlling the return temperature of the heating and hot water supply apparatus for each generation applied to regional and central heating may simultaneously use heating water heated in the heat source supply unit 100 for generation and heating for each generation. Operating the water heater 200b in the generational heating and hot water supply device 200 configured to be operated; Fully opening the hot water supply side flow control valve 262 for controlling the flow rate of the heating water returned to the heat source supply unit 100 after the heating water heated in the heat source supply unit 100 passes through the hot water supply heat exchanger 210. ; Detecting the hot water supply side return temperature by the hot water supply side return temperature sensor 254 provided in the hot water supply side return pipe 206 for returning the heating water to the heat source supply unit 100; Comparing the hot water supply return temperature with the hot water supply setting return temperature set by the heat source supply unit 100; And when the hot water supply side return temperature exceeds the upper limit of the hot water supply side set return temperature, the opening degree of the hot water supply side flow control valve 262 is decreased until the hot water supply side return temperature becomes the hot water supply side set return temperature. It comprises a control step.

In the step of comparing the hot water supply side return temperature with the hot water supply side set return temperature set by the heat source supply unit 100, when it is detected that the hot water supply side return temperature is less than the lower limit of the hot water supply side set return temperature, the hot water supply side flow rate Characterized in that the opening degree of the control valve 262 is controlled to increase.

According to the generational heating and hot water supply device and the return temperature control method applied to local and central heating according to the present invention, the heating-side return temperature or hot water recovered after being used for heating or hot water supply in the generational heating and hot water supply device By detecting the side return temperature and adjusting the opening degree of the heating side flow control valve and the hot water supply side flow control valve in accordance with the return temperature set in the local and central heating systems, it is possible to minimize energy loss.

In addition, according to the present invention, the return temperature of the heating water can be kept constant at a temperature corresponding to the set return temperature of the heating water required and recommended by the local and central heating systems regardless of heating and hot water loads, insulation conditions, and seasonal changes. It can improve the thermal efficiency of heating and hot water supply.

1 is a view showing a heating hot water supply device disclosed in Republic of Korea Utility Model Registration No. 20-471736,

2 is a block diagram of a heating and hot water supply device for each generation applied to district and central heating according to an embodiment of the present invention,

3 is a block diagram of a generational heating and hot water supply apparatus applied to district and central heating according to another embodiment of the present invention,

4 is a flowchart of a method for controlling a return temperature when a heater is operated in a heating and hot water supply device for each generation applied to local and central heating according to the present invention;

Figure 5 is a flow chart of the method of controlling the return temperature when the water heater is operated in the heating and hot water supply for each generation applied to the regional and central heating according to the present invention.

** Explanation of Codes **

100: heat source supply section 111: heat medium supply pipe

112: heat medium return pipe 110: heat exchanger

200,200 ': Heating and hot water supply 200a: Radiator

200b: water heater 201: heat source supply pipe

202: heat source return pipe 203: heating supply pipe

204: heating return pipe 205: hot water supply pipe

206: hot water supply side return pipe 207: direct water pipe

208: hot water pipe 209a: heating water supply pipe

209b: heating water return pipe 210: hot water supply heat exchanger

220: heating heat exchanger 231: heating water supply distributor

232: heating water return distributor 240: pump

241: heating pump 251: heat source supply temperature sensor

252: heat return temperature sensor 253: heating return temperature sensor

254: hot water return temperature sensor 255: direct water temperature sensor

256: hot water temperature sensor 257: heating supply temperature sensor

258: heating return temperature sensor 261: heating flow control valve

262: hot water supply flow control valve 271: flow sensor

Hereinafter, the configuration and operation of the preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

2 is a block diagram of a generational heating and hot water supply apparatus applied to district and central heating according to an embodiment of the present invention.

The generational heating and hot water supply apparatus 200 applied to regional and central heating according to an embodiment of the present invention is heated by a heat source supplied from a regional and central heating system (hereinafter, referred to as a 'heat source supply unit'). The used heating water is configured to be used simultaneously with the heater 200a and the water heater 200b. Reference numeral 200 ′ denotes a heating and hot water supply device provided in another generation, and may be configured in the same manner as the reference numeral 200.

In one embodiment, a heat exchanger 110 is provided between the heat source supply unit 100 and the heating and hot water supply device 200 to transfer the heat generated from the heat source supply unit 100 to the heating and hot water supply device 200. do. The heat medium supply pipe 111 and the heat medium return pipe 112 are circulated between the heat source supply unit 100 and the heat exchanger 110.

Between the heat exchanger 110 and the heating and hot water supply device 200, a heat source supply pipe 201 for supplying heating water heated by the heat exchanger 110 to the heating and hot water supply device 200, and heating and hot water supply. A heat source return pipe 202 through which the heating water is returned to the heat exchanger 110 through the apparatus 200 is connected, and the heat source return pipe 202 is connected between the heat exchanger 110 and the heating and hot water supply device 200. A pump 240 for circulating the heating water is installed.

The piping structure of the heating and hot water supply device 200 is branched from the heat source supply pipe 201, the heating side supply pipe 203 for supplying the heating water to the heating requirements (room or living room, such as heating is required), the Heating-side return pipe 204 for returning the heat-exchanged heating water in the heating source to the heat source return pipe 202, branched from the heat source supply pipe 201 for supplying heating water to the hot water heat exchanger 210. Hot water supply side supply pipe 205, hot water supply side return pipe 206 for returning the heating water heat exchanged with the direct water in the hot water supply heat exchanger 210 to the heat source return pipe 202 side, a direct water pipe that the direct water flows into the inside ( 207, the hot water pipe 208 to be supplied to the user after the hot water supplied through the hot water supply pipe 207 is exchanged with the heating water supplied through the hot water supply side supply pipe 205 in the hot water supply heat exchanger 210 It includes.

The heating water supplied to the heating-side supply pipe 203 is supplied to each heating point from the heating water supply distributor 231, and the heating water via the heating point is returned to the heating side via the heating water returning distributor 232. Is returned to the tube 204.

The heat source supply pipe 201 and the heat source return pipe 202 connected to each generation are provided with a heat source supply temperature sensor 251 and a heat source return temperature sensor 252, respectively. Provide reference temperature information.

The heating side return pipe 204 has a heating side return temperature sensor 253 for detecting a heating return temperature of the heating water, and a heating side for adjusting the flow rate of the heating water returned through the heating return pipe 205. A flow control valve 261 is provided.

The hot water supply side return pipe 206 has a hot water supply side return temperature sensor 254 for detecting a hot water return temperature of the heating water, and a hot water supply side for adjusting the flow rate of the heating water returned through the hot water supply return pipe 206. The flow control valve 262 is provided.

The direct water pipe 207 is provided with a direct water temperature sensor 255 and a flow sensor 271 for detecting the flow rate of the direct water, and the hot water pipe 208 is provided with a hot water temperature sensor 256.

In addition, the heating and hot water supply device 200 controls the opening degree of the heating-side flow control valve 261 so that the heating-side return temperature corresponds to the heating-side set return temperature required and recommended by the local and central heating systems. And a control unit (not shown) for controlling the opening degree of the hot water supply side flow control valve 262 such that the hot water supply side return temperature corresponds to the hot water supply side set return temperature required and recommended by the local and central heating systems.

The heating-side set return temperature Ts1 and the hot water supply-side set return temperature Ts2 may be set within a range between a reference set value Tr and an upper limit value Tr + ΔT and a lower limit value Tr−ΔT. The heating-side set return temperature Ts1 and the hot water supply-side set return temperature Ts2 are values set by the local and central heating systems, and may be set to the same or different temperatures.

For example, when the heating-side set return temperature and the hot water supply-side return water temperature are set equal to each other, and the reference set value Tr is set to 30 ° C and the temperature deviation ΔT is set to 2 ° C, the heating-side set return temperature and the hot water supply The upper limit of the measured return temperature is set to 32 ° C, and the lower limit is set to 28 ° C.

If the heating-side return temperature detected by the heating-side return temperature sensor 253 exceeds the upper limit of the heating-side set return temperature, the control unit controls the heating flow control valve until the heating-side return temperature becomes the heating-side set return temperature. The opening degree of 261 is controlled to be reduced. In this case, the flow rate of the heating water returned from the heating source to the heating-side return pipe 203 is reduced, and at the same time, the time for the heating water to stay in the heating element is increased, so that the amount of heat transfer transferred from the heating water to the heating element is increased. Efficiency can be increased.

When the heating-side return temperature is detected to be less than the lower limit of the heating-side set return temperature range by the opening amount decrease of the heating-side flow control valve 261, the control unit may increase the opening degree of the heating-side flow control valve 261. Control.

Similarly, when the hot water supply side return temperature detected by the hot water supply side return temperature sensor 254 exceeds the upper limit value of the hot water supply side set return temperature, the controller controls the hot water supply side until the hot water supply side return temperature becomes the hot water supply side return water return temperature. The opening degree of the flow control valve 262 is controlled to be reduced. In this case, since the flow rate of the heating water returned from the hot water supply heat exchanger 210 to the heating-side return pipe 203 side decreases and the time for which the heating water stays in the hot water supply heat exchanger 210 increases, the water is transferred directly from the heating water. The heat transfer amount is increased to increase the heat exchange efficiency.

When the hot water supply side return temperature is detected to be less than the lower limit of the hot water supply side set return temperature range due to the decrease in the opening amount of the hot water supply side flow control valve 262, the control unit may increase the opening degree of the hot water supply side flow control valve 262. Control.

3 is a block diagram of a generational heating and hot water supply apparatus applied to district and central heating according to another embodiment of the present invention.

This embodiment omits the configuration of the heat exchanger 110 in comparison with the embodiment described above with reference to FIG. 2, and the heating water supplied to the heating-side supply pipe 203 is supplied to the heating-side return pipe via the heating heat exchanger 220. And a heating water return pipe 209b to which the heating water recovered from the heating water return distributor 232 is fed by the feeding of the heating pump 241 to the heating heat exchanger 220, and the heating water. The heating water supply pipe 209a through which the heating water is supplied through the return pipe 209b and passed through the heating heat exchanger 220 and then supplied to the heating water supply distributor 231 is connected to the heating water return pipe 209b. The heating return temperature sensor 258 is provided, and the heating water supply pipe 209a is provided with a heating supply temperature sensor 257, a part of the configuration is different, and other configurations are the same as the above-described embodiment It is.

Also in this embodiment, the heating-side return pipe 204 is provided with a heating-side return temperature sensor 253 and a heating-side flow rate control valve 261, and the hot water supply-side return pipe 206 has a hot water supply side as in the above-described embodiment. A return temperature sensor 254 and a hot water supply side flow control valve 262 are provided so that the heating-side return temperature and the hot water supply-side return temperature are kept constant in response to the heating-side set return temperature and the hot water-side set return temperature, respectively. The features of the invention are in common in that the opening degree of the flow regulating valve 261 and the hot water supply side flow regulating valve 262 is controlled.

Hereinafter, a method of controlling the return temperature of the heating water in the heating and hot water supply apparatus for each generation applied to the region and the central heating configured as described above will be described.

Figure 4 is a flow chart of the method of controlling the return temperature when the heater is running in the heating and hot water supply for each generation applied to the regional and central heating according to the present invention.

In the method of controlling the return temperature when the heater 200a is operated in the generational heating and hot water supply apparatus applied to the regional and central heating according to the present invention, the heating water heated in the heat source supply unit 100 is used for heating and hot water supply for each generation. Step (S10) in which the heater 200a is operated in the generation-specific heating and hot water supply apparatus 200 configured to be used at the same time (S10), after the heating water heated in the heat source supply unit 100 passes through the heating requirements, the heat source supply unit 100 In step (S11) of completely opening the heating side flow control valve (261) for adjusting the flow rate of the heating water returned to the heating source, to the heating side return pipe (204) for returning the heating water to the heat source supply unit (100) Detecting a heating-side return temperature from the provided heating-side return temperature sensor 253 (S12), comparing the heating-side return temperature with a heating-side set return temperature (S13), and the heating-side return temperature is the heating side Set return on If the upper limit value of the control step so that the opening degree of the heating side flow control valve (261) is reduced until the heating-side return temperature is the heating-side set return temperature (S14), By comparing the heating-side return temperature with the heating-side set return temperature in a state where the opening degree is reduced (S15), when it is detected that the heating-side return temperature is less than the lower limit of the heating-side set return temperature, the heating-side flow control valve 261. In step S16, the opening degree of the heating-side flow rate control valve 261 is increased and the heating-side return temperature is compared with the heating-side set return temperature (S17). Controlling the opening degree of the heating side flow regulating valve 261 to be in a stopped state in the case of being within the side set return temperature range (S18), and heating if the heating side return temperature is out of the heating side set return temperature range. The return temperature so as to satisfy the heating-side return temperature setting range comprises a step (S19) for adjusting the opening of the heating-side flow rate adjustment valve 261.

5 is a flowchart illustrating a method for controlling a return temperature when a water heater is operated in a generational heating and hot water supply device applied to regional and central heating according to the present invention.

The method of controlling the return temperature when the water heater 200b is operated in the generational heating and hot water supply device applied to the regional and central heating according to the present invention is to use the heating water heated in the heat source supply unit 100 for generational heating and hot water supply. Step (S20) in which the water heater 200b is operated in the heating and hot water supply apparatus 200 for each generation configured to be used at the same time, after the heating water heated in the heat source supply unit 100 passes through the hot water supply heat exchanger 210. Completely opening the hot water supply side flow control valve 262 for adjusting the flow rate of the heating water returned to the supply unit 100 (S21), the hot water supply side return pipe for returning the heating water to the heat source supply unit (100) Detecting a hot water supply side return temperature by the hot water supply side return temperature sensor 254 provided in step 206, comparing the hot water supply return temperature with a hot water supply set return temperature (S23), and the hot water supply return water temperature Hot water supply side setting Controlling the opening degree of the hot water supply side flow regulating valve 262 to be reduced until the hot water supply side return temperature reaches the hot water supply side set return temperature (S24), the hot water supply flow rate regulating valve 262 when the water temperature exceeds the upper limit value of the water temperature. The hot water supply side return temperature is compared with the hot water supply side set return temperature in a state where the opening degree is decreased (S25), and when the hot water supply side return temperature is detected to be less than the lower limit of the hot water supply side return water return temperature, the hot water supply flow rate control valve 262 In step S26, the opening degree of the hot water supply flow control valve 262 is increased, comparing the hot water supply side return temperature with the hot water supply setting return temperature (S27), and the hot water supply return water temperature is increased. When the hot water supply side set return temperature range is within the step of controlling the opening degree of the hot water supply side flow control valve 262 to stop (S28), when the hot water supply side return temperature is out of the hot water supply side set return temperature range The side return temperature consists of a step (S29) for adjusting the opening degree of the hot water supply-side flow rate control valve 262 so as to satisfy the hot water supply-side return temperature setting range.

According to the generation-specific heating and hot water supply device and the return temperature control method applied to the regional and central heating of the present invention configured as described above, it is recovered after being used for heating or hot water supply in the generation-specific heating and hot water supply device 200. Energy loss is minimized by detecting the heating return temperature or the hot water return temperature and adjusting the opening degree of the heating flow control valve 261 and the hot water supply flow control valve 262 according to the return temperature set in the local and central heating systems. It can maintain the return temperature of heating water at a temperature corresponding to the set return temperature of heating water required and recommended by local and central heating systems regardless of heating and hot water load, insulation condition, seasonal change, etc. And it is possible to improve the thermal efficiency of the hot water supply device 200.

Claims

A heating-side supply pipe 203 for supplying heating water heated by the heat source supply unit 100 to a heating source;

A heating-side return pipe 204 for returning the heating water that has undergone heat exchange at the heating source to the heat source supply unit 100;

Hot water supply side supply pipe 205 for supplying the heating water heated in the heat source supply unit 100 to the hot water supply heat exchanger (210);

Hot water supply side return pipe (206) for returning the heating water heat exchanged with the hot water in the hot water supply heat exchanger 210 to the heat source supply unit (100);

Direct water pipe 207 is introduced into the direct water;

A hot water pipe 208 for direct water supplied through the hot water pipe 207 to be supplied to a user after heat exchange with heating water supplied from the hot water heat exchanger 210 through the hot water supply side supply pipe 205;

A heating-side return temperature sensor 253 for detecting a heating-side return temperature of the heating water returned through the heating-side return pipe 204;

A heating side flow control valve 261 for adjusting a flow rate of the heating water returned through the heating side return pipe 204;

A hot water supply side return temperature sensor 254 for detecting a hot water supply side return temperature of the heating water returned through the hot water supply side return pipe 206;

Hot water supply side flow control valve 262 for adjusting the flow rate of the heating water is returned through the hot water supply side return pipe (206); And

The opening degree of the heating side flow control valve 261 is controlled to correspond to the heating-side return temperature corresponding to the heating-side set return temperature, and the hot water supply-side flow control valve is configured to correspond to the hot water supply-side return temperature. A control unit for controlling the opening degree of 262;

Household heating and hot water supply device applied to local and central heating, including.
The method of claim 1,

The heating-side set return temperature is set in a range between an upper limit value and a lower limit value,

When the heating-side return temperature exceeds the upper limit of the heating-side set return temperature, the controller controls the opening degree of the heating-side flow regulating valve 261 until the heating-side return temperature reaches the heating-side set return temperature. Generational heating and hot water supply for local and central heating characterized by controlling to be reduced.
The method of claim 2,

When the heating-side return temperature is less than the lower limit of the heating-side set return temperature range, the control unit controls the opening degree of the heating-side flow control valve 261 for each generation applied to the area and central heating Heating and hot water supply.
The method of claim 1,

The hot water supply side set return temperature is set in a range between an upper limit value and a lower limit value,

If the hot water supply side return temperature exceeds the upper limit of the hot water supply side set return temperature, the controller controls the opening degree of the hot water supply side flow control valve 262 until the hot water supply side return temperature becomes the hot water supply side set return temperature. Generational heating and hot water supply for local and central heating characterized by controlling to be reduced.
The method of claim 4, wherein

When the hot water supply side return temperature is less than the lower limit of the hot water supply side set return temperature range, the controller controls the opening degree of the hot water supply side flow control valve 262 to increase by each generation applied to the regional and central heating Heating and hot water supply.
Operating the heater 200a in the generational heating and hot water supply device 200 configured to simultaneously use the heating water heated by the heat source supply unit 100 for generational heating and hot water supply;

Completely opening the heating-side flow rate control valve 261 for controlling the flow rate of the heating water returned to the heat source supply unit 100 after the heating water heated in the heat source supply unit 100 passes through the heating source;

Detecting a heating-side return temperature from the heating-side return temperature sensor 253 provided in the heating-side return pipe 204 for returning the heating water to the heat source supply unit 100;

Comparing the heating-side return temperature with the heating-side set return temperature; And

When the heating-side return temperature exceeds the upper limit of the heating-side set return temperature, the opening degree of the heating-side flow rate control valve 261 is reduced until the heating-side return temperature reaches the heating-side set return temperature. The method of controlling the return temperature of the heating and hot water supply for each generation applied to the local and central heating comprising a.
The method of claim 6,

In the step of comparing the heating side return temperature and the heating side set return temperature,

When it is detected that the heating-side return temperature is less than the lower limit of the heating-side set return temperature, the opening degree of the heating-side flow regulating valve 261 is controlled to increase so that the generation-specific households are applied to the area and the central heating. How to control the return temperature of the heating and hot water supply.
Operating the water heater 200b in the generational heating and hot water supply device 200 configured to simultaneously use the heating water heated by the heat source supply unit 100 for generational heating and hot water supply;

Fully opening the hot water supply side flow control valve 262 for controlling the flow rate of the heating water returned to the heat source supply unit 100 after the heating water heated in the heat source supply unit 100 passes through the hot water supply heat exchanger 210. ;

Detecting the hot water supply side return temperature by the hot water supply side return temperature sensor 254 provided in the hot water supply side return pipe 206 for returning the heating water to the heat source supply unit 100;

Comparing the hot water supply return temperature with the hot water supply setting return temperature set by the heat source supply unit 100; And

When the hot water supply side return temperature exceeds the upper limit of the hot water supply side set return temperature, the opening degree of the hot water supply side flow rate control valve 262 is controlled to be reduced until the hot water supply side return temperature becomes the hot water supply side set return temperature. The method of controlling the return temperature of the heating and hot water supply for each generation applied to the local and central heating comprising a.
The method of claim 8,

In the step of comparing the hot water supply side return temperature and the hot water supply-side set return temperature set by the heat source supply unit 100,

When it is detected that the hot water supply side return temperature is lower than the lower limit of the hot water supply side set return temperature, the opening degree of the hot water supply side flow rate control valve 262 is controlled to increase so that the generation is applied to the district and the central heating. How to control the return temperature of the heating and hot water supply.