JP2020165559A - Temperature-type exchange unit - Google Patents

Abstract

To provide a temperature-type exchange unit which can easily switch a temperature system from a simple two-temperature system to a two-temperature system.SOLUTION: A temperature-type exchange unit comprises: two inlets 41, 42 corresponding to a high-temperature hot water discharge port Pf12 and a low-temperature hot water discharge port Pf15 from which the two-temperature hot water of high-temperature hot water and low-temperature hot water in a heat source unit 1 for use in a two-temperature system hot water circulation heating system is discharged; one outlet 43 which can discharge hot water introduced from the heat source unit 1 via at least either of the two inlets 41, 42, and corresponds to one connecting port 31 of a header 30 which is used in a simple two-temperature system hot water circulation heating system; and a three-way valve 50 arranged between the two inlets 41, 42 and the outlet 43, adjusting flow rates of the high-temperature hot water and the low-temperature hot water introduced from the two inlets 41, 42, and guiding the hot water to one outlet 43.SELECTED DRAWING: Figure 4

Description

The present invention relates to a temperature conversion unit.

Patent Document 1 discloses a hot water circulation heating system that circulates hot water between a heat source machine and a heating terminal. In the hot water circulation heating system of Patent Document 1, a so-called two-temperature method is adopted in which high-temperature hot water and low-temperature hot water are supplied from one heat source machine to each of the high-temperature heating terminal and the low-temperature heating terminal. The two-temperature type heat source machine has two hot water discharge ports corresponding to each of the high temperature heating terminal and the low temperature heating terminal, and one of the two hot water discharge ports of the heat source machine is passed through a high temperature flow path. It is connected to the high temperature heating terminal, and the other of the two hot water outlets is connected to the low temperature heating terminal via a low temperature flow path. Therefore, from the two-temperature heat source machine, high-temperature hot water is supplied to the high-temperature heating terminal via the high-temperature flow path, and low-temperature hot water is supplied to the low-temperature heating terminal via the low-temperature flow path.

On the other hand, the heat source machine has only one hot water discharge port, and one hot water discharge port of the heat source machine is connected to the high temperature heating terminal and the low temperature heating terminal, so-called simple two-temperature hot water circulation heating. The system also exists. Since the simple two-temperature heat source machine has only one hot water outlet, only one temperature of hot water can be supplied from the heat source machine. Therefore, one hot water discharge port of the simple two-temperature heat source machine, the high-temperature heating terminal, and the low-temperature heating terminal are connected to a header that distributes hot water at one temperature from the heat source machine. Then, when supplying high-temperature hot water to the high-temperature heating terminal, the distribution path of the header is switched so as to distribute the high-temperature hot water from the heat source machine to the high-temperature heating terminal. On the other hand, when supplying low-temperature hot water to the low-temperature heating terminal, the distribution path of the header is switched so as to distribute the low-temperature hot water from the heat source machine to the low-temperature heating terminal.

Japanese Unexamined Patent Publication No. 2000-193254

In recent years, there has been an increasing demand for switching from a simple two-temperature hot water circulation heating system to a two-temperature hot water circulation heating system. From the viewpoint that existing equipment can be diverted, a method of switching the heat source machine of the simple two-temperature type hot water circulation heating system to the two-temperature type heat source machine has been proposed. That is, in the simple two-temperature hot water circulation heating system, only the heat source unit is replaced while leaving the header, heating terminal, piping, and the like.

Of the simple two-temperature hot water circulation heating system, in order to switch the heat source machine to the two-temperature heat source machine, a two-temperature system having two newly introduced hot water outlets (high-temperature hot water outlet and low-temperature hot water outlet) It is necessary to connect the heat source machine of the above and a simple two-temperature type header having only one existing hot water outlet. However, in a simple two-temperature hot water circulation heating system, a header may be arranged in the vicinity of the heating terminal so that the distributed hot water can be immediately supplied to the heating terminal. In this case, the header is located away from the heat source machine, for example under the floor of the facility. Therefore, it is important to connect the newly introduced two-temperature heat source machine having two hot water outlets and the simple two-temperature header having only one existing hot water outlet from the viewpoint of securing the installation location. It can be difficult, which is an obstacle to switching to the two-temperature system.

Therefore, the present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide a temperature system conversion unit capable of easily switching from a simple two-temperature system to a two-temperature system.

The characteristic configuration of the temperature conversion unit according to the present invention is
In a heat source machine used in a two-temperature hot water circulation heating system, two inlets corresponding to a high-temperature hot water outlet and a low-temperature hot water outlet for discharging two-temperature hot water of high-temperature hot water and low-temperature hot water,
Hot water introduced from the heat source machine through at least one of the two inlets can be discharged, and corresponds to one connection port of a hot water distributor used in a simple two-temperature hot water circulation heating system. One exit and
A regulating valve provided between the two inlets and the outlets, which adjusts the flow rates of the hot water and the low temperature hot water introduced from the two inlets and guides them to the one outlet.
It is in the point of having.

According to the above feature configuration, the temperature conversion unit is interposed between the two-temperature heat source machine and the simple two-temperature hot water distributor. Specifically, the temperature conversion unit has two inlets on the upstream side and one outlet on the downstream side. The two inlets on the upstream side of the temperature conversion unit correspond to the two hot water outlets, the high temperature hot water outlet and the low temperature hot water outlet, respectively, of the two-temperature heat source machine. Further, one outlet on the downstream side of the temperature conversion unit corresponds to one connection port of the simple two-temperature hot water distributor. When switching from a simple two-temperature heat source machine with one hot water outlet to a two-temperature heat source machine with two hot water outlets, a high-temperature hot water outlet and a low-temperature hot water outlet, a new hot water outlet Is increased by one, and it is necessary to newly lay a pipe for allowing hot water to flow from the hot water outlet.

When the above temperature conversion unit is adopted, a new pipe may be laid from the new hot water discharge port to the temperature conversion unit in front of the connection port of the simple two-temperature hot water distributor. There is no need to install a new long pipe from the new hot water outlet to the hot water distributor. For example, when the hot water distributor is arranged under the floor or the like, it may be difficult to additionally lay a pipe leading to the hot water distributor due to reasons such as a narrow work space or darkness. By providing the temperature system conversion unit with the above configuration, such difficulties can be avoided, and the hot water circulation heating system can be easily constructed by applying the two-temperature system heat source machine to the simple two-temperature system hot water circulation heating system. is there.

Further characteristic configurations of the temperature conversion unit according to the present invention are
The point is that a control unit for controlling the flow rate of the high temperature hot water and the low temperature hot water is provided by controlling the control valve.

According to the above-mentioned feature configuration, the control valve controls the flow rate of the hot water at a high temperature and the hot water at a low temperature, so that the hot water at a desired temperature can be guided to the outlet of the temperature conversion unit.

Further characteristic configurations of the temperature conversion unit according to the present invention are
A temperature detector for detecting the temperature of hot water flowing between the regulating valve and the outlet is provided.
The control unit is at a point of controlling the regulating valve based on the temperature of hot water detected by the temperature detector.

According to the above-mentioned feature configuration, since the regulating valve is controlled based on the temperature of the hot water detected by the temperature detector, the hot water having a desired temperature can be guided to the outlet of the temperature conversion unit. In particular, since the temperature of the hot water on the outlet side of the temperature conversion unit is detected, it is possible to guide the hot water at a desired temperature to the hot water distributor.

Further characteristic configurations of the temperature conversion unit according to the present invention are
The regulating valve is a three-way valve having three switching ports, and the two switching ports are connected to the two inlets, respectively, and one switching port is connected to one outlet.

According to the above-mentioned feature configuration, a regulating valve capable of discharging a desired temperature can be realized by a simple three-way valve.

Further characteristic configurations of the temperature conversion unit according to the present invention are
The two-temperature type hot water circulation heating system includes a high-temperature heating terminal and a low-temperature heating terminal.
When only the high temperature heating terminal is used, the regulating valve connects one inlet to which the hot hot water is discharged from the heat source machine and the one outlet.
When only the low temperature heating terminal is used, the regulating valve connects one inlet to which the low temperature hot water is discharged from the heat source machine and the one outlet.
When both the high temperature heating terminal and the low temperature heating terminal are used, the regulating valve has one inlet from which the hot water is discharged from the heat source machine and the low temperature hot water is discharged from the heat source machine. It is at the point of connecting the one inlet and the one outlet.

According to the above characteristic configuration, the connection state between the two inlets that receive the hot water and the hot water of the low temperature and the one outlet that discharges the hot water introduced from these inlets is adjusted by the adjusting valve. As a result, high-temperature hot water is supplied only to the high-temperature heating terminal, low-temperature hot water is supplied only to the low-temperature heating terminal, and high-temperature hot water and low-temperature hot water are provided to the high-temperature heating terminal and the low-temperature heating terminal, respectively. It is possible to guide the desired hot water to the hot water distributor according to each case.

Further characteristic configurations of the temperature conversion unit according to the present invention are
The point that the temperature system conversion unit is provided at a position close to the two temperature system heat source machine in the flow path between the two temperature system heat source machine and the simple two temperature system hot water distributor. is there.

According to the above-mentioned feature configuration, by providing the temperature system conversion unit at a position close to the two-temperature system heat source machine, it is easy to lay the temperature system conversion unit, and the simple two-temperature system hot water circulation heating system to the two-temperature system The temperature system can be easily changed to the hot water circulation heating system.

It is a block diagram of a hot water circulation heating system of a two-temperature system. It is a block diagram of a hot water circulation heating system of a simple two-temperature system. It is a block diagram which shows an example of arrangement of a heat source machine, a header, and a heating terminal in a facility which adopts a simple two-temperature type hot water circulation heating system. It is a block diagram of the system when the temperature system conversion unit is adopted and the heat source machine is switched to the two temperature system heat source machine among the simple two temperature system hot water circulation heating system. It is explanatory drawing of the control method of the valve body by the three-way valve of a temperature system conversion unit. It is explanatory drawing of the control method of the valve body by the three-way valve of a temperature system conversion unit. It is explanatory drawing of the control method of the valve body by the three-way valve of a temperature system conversion unit. It is a block diagram of the system when the heat source machine is switched to the two-temperature type heat source machine among the simple two-temperature type hot water circulation heating system without adopting the temperature type conversion unit.

The temperature conversion unit according to the embodiment of the present invention will be described below.

[Embodiment]
The temperature system conversion unit according to the embodiment of the present invention is used to facilitate switching of the temperature system from the simple two-temperature system hot water circulation heating system to the two-temperature system hot water circulation heating system.

A general two-temperature hot water circulation heating system includes a heat source machine having a high-temperature hot water outlet for discharging high-temperature hot water and a low-temperature hot water discharge port for discharging low-temperature hot water, a high-temperature heating terminal, and a low-temperature heating terminal. And are provided. The two-temperature heat source machine supplies high-temperature hot water to the high-temperature heating terminal from the high-temperature hot water outlet, and supplies low-temperature hot water to the low-temperature heating terminal from the low-temperature hot water outlet.

On the other hand, a general simple two-temperature hot water circulation heating system includes a heat source machine having a hot water discharge port for discharging hot water at a desired temperature, a high-temperature heating terminal, and a low-temperature heating terminal. Unlike the two-temperature heat source machine, the simple two-temperature heat source machine is provided with only one hot water outlet, and two hot water outlets such as a high-temperature hot water outlet and a low-temperature hot water outlet. Not done. Therefore, in order to distribute hot water of a desired temperature from the hot water outlet to the high-temperature heating terminal and the low-temperature heating terminal, the simple two-temperature hot water circulation heating system includes a heat source machine, a high-temperature heating terminal, and a low-temperature heating terminal. A header is provided between. Then, hot water at a desired temperature is distributed from the hot water discharge port from the simple two-temperature heat source machine to the high-temperature heating terminal and the low-temperature heating terminal via the header.

(1) Configuration of hot water circulation heating system The outline of the general two-temperature hot water circulation heating system and the general simple two-temperature hot water circulation heating system has been described above, but the specific configuration of each system Will be further described.

(1-1) Two-Temperature Hot Water Circulation Heating System First, a general two-temperature hot water circulation heating system 100 will be described with reference to FIG.

As shown in FIG. 1, in a general two-temperature type hot water circulation heating system 100, a heat source machine 1 for heating a heat medium and heating terminals A and B to which hot water generated by heating by the heat source machine 1 are supplied are supplied. , C (low-temperature heating terminals A and B, high-temperature heating terminal C) and water from the water supply channel L21 connected to the water pipe are heated, and the heated hot water is supplied to the bath water heater, the kitchen water heater, and the like. It is equipped with a heat source machine 2.

The heat medium to be heated by the heat source machine 1 is not limited to this, but is, for example, water or hot water.

Further, although not limited to this, the high temperature heating terminal C is, for example, a bathroom drying heater, and the low temperature heating terminals A and B are, for example, floor heating devices, respectively.

The heat source machine 1 includes a heating unit H1 that heats water as a heat medium, and a heating tank 15 that can absorb the expansion of water. The heating unit H1 includes a heat medium burner g1 and a heat exchanger EX1. A fuel gas (for example, city gas 13A) is supplied to the heat medium burner g1 to burn the fuel gas. The heat of the exhaust gas generated by the combustion of the fuel gas is supplied to the heat exchanger EX1 to heat the water or hot water flowing through the heat exchanger EX1.

The heating tank 15 is provided on the upstream side of the heating unit H1 between the heat medium return path L14 and the low temperature heat medium outbound path L15, which will be described later. The heating tank 15 is configured to be able to store water by being replenished with water as a heat medium and to be able to discharge water from the inside of the heating tank 15. With such a configuration, the heating tank 15 absorbs the expansion of water and hot water at the heating terminals A, B, C and the like, for example. For example, the heating tank 15 absorbs the expansion of water and hot water by releasing the pressure in the heating terminals A, B, C, etc. to the atmosphere.

A heat medium return path L14 through which low-temperature return hot water discharged from the heating terminals A, B, and C flows is connected to the inlet of the heating tank 15. Further, a low temperature heat medium outbound path L15 through which low temperature hot water in which high temperature hot water supplied from the bypass path L16 described later is mixed with low temperature return hot water flows is connected to the outlet of the heating tank 15. The low temperature heat medium supply path L11 is a flow path branched from the low temperature heat medium outbound path L15 and is connected to the inlet of the heat exchanger EX1. Further, a high temperature heat medium outbound path L12 for passing high temperature hot water is connected to the outlet of the heat exchanger EX1.

When a pump (not shown) provided in the low temperature heat medium supply path L11 is driven, low temperature hot water is supplied from the heating tank 15 to the heat exchanger EX1 via the low temperature heat medium supply path L11. Then, the heat exchanger EX1 exchanges heat between the supplied heat medium and the heat of the exhaust gas, heats the low-temperature hot water, and discharges the high-temperature hot water. The high-temperature hot water passes through the high-temperature heat medium outbound path L12 and is used to supply the high-temperature heating terminal C.

A bypass path L16 is provided between the high-temperature heat medium outward path L12 and the heat medium return path L14. As a result, the low-temperature return hot water flowing through the heat medium return path L14 is mixed with the high-temperature hot water flowing through the high-temperature heat medium return path L12, and low-temperature hot water is generated. The low-temperature hot water passes through the low-temperature heat medium outbound path L15 via the heat medium return path L14 and the heating tank 15, and is used to supply the low-temperature heating terminals A and B.

Although not limited to this, in the hot water circulation heating system of the two-temperature system, the high-temperature hot water is, for example, hot water of about 80 ° C., and the low-temperature hot water is, for example, hot water of about 68 ° C. to 72 ° C. Further, the low-temperature return hot water is lower than the low-temperature hot water, for example, hot water of about 50 ° C. to 60 ° C.

The two-temperature heat source machine 1 has a high-temperature hot water discharge port Pf12 connected to the high-temperature heat medium outbound path L12 to discharge high-temperature hot water and a low-temperature hot water discharge port connected to the low-temperature heat medium outbound path L15 to discharge low-temperature hot water. It has Pf15 and a low-temperature hot water intake port Pr14 that is connected to the heat medium return path L14 and takes in the return hot water.

The high temperature hot water discharge port Pf12 is connected to the high temperature heat medium outbound path L12α, and the high temperature hot water in the high temperature heat medium outbound path L12 is supplied to the high temperature heating terminal C via the high temperature heat medium outbound path L12α. The low temperature hot water discharge port Pf15 is connected to the low temperature heat medium outbound path L15α. The low temperature heat medium outbound path L15α is branched into a low temperature heat medium outbound path L15αa and a low temperature heat medium outbound path L15αb. Then, the low-temperature hot water discharged from the low-temperature hot water discharge port Pf15 is supplied to the low-temperature heating terminal A via the low-temperature heat medium outbound path L15αa, and is supplied to the low-temperature heating terminal B via the low-temperature heat medium outbound path L15αb. ..

The low temperature hot water intake port Pr14 is connected to the heat medium return path L14α. In the heat medium return path L14α, low-temperature return hot water from the low-temperature heating terminal A via the heat medium return path L14αa and low-temperature return hot water from the low-temperature heating terminal B via the heat medium return path L14αb are heat media. The low-temperature return hot water from the high-temperature heating terminal C is supplied via the return path L14αc.

The general two-temperature hot water circulation heating system 100 has the above configuration, and the flow of hot water circulation in the entire system will be described as follows.

The high-temperature hot water heated by the heating unit H1 is discharged from the high-temperature hot water discharge port Pf12 of the heat source machine 1 via the high-temperature heat medium outbound path L12. The high-temperature hot water discharged from the high-temperature hot water discharge port Pf12 is supplied to the high-temperature heating terminal C via the high-temperature heat medium outbound path L12α, and becomes low-temperature return hot water via the high-temperature heating terminal C. The low-temperature return hot water is taken into the heat source machine 1 from the low-temperature hot water intake port Pr14 via the heat medium return paths L14αc and L14α, and is supplied to the heating tank 15 via the heat medium return path L14. In the present embodiment, the low-temperature return hot water that has passed through the low-temperature heating terminals A and B is also supplied to the heating tank 15 from the low-temperature hot water intake port Pr14. This low-temperature return hot water mixes with the high-temperature hot water supplied from the bypass path L16 in the process of passing through the heat medium return path L14 and returning to the heating tank 15, and the low-temperature hot water that can be supplied to the low-temperature heating terminals A and B. Is adjusted to.

The low-temperature hot water prepared by mixing the high-temperature hot water and the low-temperature hot water is supplied from the heating tank 15 to the low-temperature heat medium outbound path L15α via the low-temperature heat medium outbound path L15 and the low-temperature hot water discharge port Pf15. The low temperature heat medium outbound path L15α is branched into the low temperature heat medium outbound paths L15αa and L15αb, respectively, and low temperature hot water is supplied to the low temperature heating terminals A and B, respectively. Then, the low-temperature return hot water discharged from the low-temperature heating terminals A and B is discharged from the heat medium return paths L14αa and L14αb, respectively, and is supplied to the heating tank 15 from the low-temperature hot water intake port Pr14 via the heat medium return path L14α. Will be done.

The low temperature heat medium supply path L11 branches from the low temperature heat medium outbound path L15, and low temperature hot water is introduced into the inlet of the heat exchanger EX1 of the heating section H1. The low-temperature hot water is heated by the heat exchanger EX1 and becomes high-temperature hot water again. As described above, in the two-temperature hot water circulation heating system 100, hot water circulates between the heat source unit 1 and the heating terminals A, B, and C.

As shown in FIG. 1, the two-temperature hot water circulation heating system 100 may be provided with a heat source machine 2 different from the heat source machine 1. The heat source machine 2 includes a hot water supply burner g2 and a heat exchanger EX2. A fuel gas (for example, city gas 13A) is supplied to the hot water supply burner g2 to burn the fuel gas. The heat of the exhaust gas generated by the combustion of the fuel gas is supplied to the heat exchanger EX2. A water supply channel L21 is connected to the inlet of the heat exchanger EX2, and a hot water supply channel L22 is connected to the outlet of the heat exchanger EX2. Therefore, the heat exchanger EX2 heats the water by exchanging heat between the water supplied from the water supply channel L21 and the heat of the exhaust gas. Then, the hot water heated by the heat exchanger EX2 is output to a hot water tap (not shown) via the hot water supply passage L22.

(1-2) Simple Bi-Temperature Hot Water Circulation Heating System Next, a general simple two-temperature hot water circulation heating system 200 will be described with reference to FIG. The configuration overlapping with the two-temperature hot water circulation heating system 100 will be briefly described or omitted.

As shown in FIG. 2, a general simple two-temperature hot water circulation heating system 200 includes a heat source machine 3, heating terminals A, B, C (low temperature heating terminals A, B, high temperature heating terminal C), and a heat source. It is equipped with a machine 2. Since the general simple two-temperature heat source machine 2 of FIG. 2 is the same as the general two-temperature heat source machine 2 of FIG. 1, description thereof will be omitted.

The configuration of the heating section H1 and the heating tank 15 of the general simple two-temperature heat source machine 3 is the same as that of the heating section H1 and the heating tank 15 of the general two-temperature heat source machine 1 of FIG. However, the general two-temperature hot water circulation heating system 100 is provided with two hot water discharge ports (high temperature hot water discharge port Pf12 and low temperature hot water discharge port Pf15) for separately discharging high temperature hot water and low temperature hot water. On the other hand, the simple two-temperature hot water circulation heating system 200 is significantly different in that only one hot water discharge port Pfa12 for discharging only hot water at a desired temperature is provided. The difference in this configuration will be further described below.

As described above, in the general two-temperature type hot water circulation heating system 100 of FIG. 1, a high temperature hot water discharge port Pf12 for supplying high temperature hot water and a low temperature hot water discharge port Pf15 for supplying low temperature hot water are provided. Has been done. Then, the high-temperature hot water from the high-temperature hot water discharge port Pf12 is supplied to the high-temperature heating terminal C via the high-temperature heat medium outbound path L12α. On the other hand, low-temperature hot water from the low-temperature hot water discharge port Pf15 is supplied to the low-temperature heating terminals A and B via the low-temperature heat medium outbound paths L15αa and L15αb. The low-temperature hot water discharged from the low-temperature hot water discharge port Pf15 is generated by mixing the low-temperature return hot water from the heating terminals A, B, and C with the high-temperature hot water flowing through the high-temperature heat medium outbound path L12.

On the other hand, in the general simple two-temperature hot water circulation heating system 200 of FIG. 2, the heat source device 3 has the desired temperatures of the heating terminals A, B, and C (low temperature heating terminals A, B, high temperature heating terminal C). Hot water is discharged according to the above, and only the hot water discharge port Pfa12 is provided as the hot water discharge port. The hot water of a desired temperature discharged from the hot water discharge port Pfa 12 is distributed to the low temperature heating terminals A and B and the high temperature heating terminal C via the header (hot water distributor) 30.

More specifically, the hot water having a desired temperature generated in the heat source machine 3 is discharged from the hot water discharge port Pfa 12 and supplied to the header 30. The header 30 has a connection port 31 which is an inlet for receiving hot water supply, and outlets 32a, 32b, and 32c for distributing and discharging the supplied hot water at a desired temperature. The hot water discharge port Pfa12 of the heat source machine 3 and the connection port 31 of the header 30 are connected via the heat medium outbound path L12β. Therefore, hot water having a desired temperature flowing through the heat medium outbound path L12 is supplied to the header 30 via the heat medium outbound path L12β. Heat medium outlets L12βa, L12βb, and L12βc for supplying hot water to the low-temperature heating terminals A, B, and high-temperature heating terminals C are connected to the outlets 32a, 32b, and 32c of the header 30, respectively. Therefore, the header 30 distributes hot water at a desired temperature according to the operating state of the heating terminals A, B, and C, and distributes the hot water to the heat medium outbound paths L12βa, L12βb, and L12βc via the outlets 32a, 32b, and 32c, respectively. ..

For example, when only the high-temperature heating terminal C is operated, the heat source machine 3 adjusts the heating amount to generate high-temperature hot water (for example, hot water at 80 ° C.), and from the hot water discharge port Pfa12 via the heat medium outbound path L12β. Is supplied to the header 30. The header 30 distributes high-temperature hot water from the heat medium outbound path L12β to the heat medium outbound path L12βc and supplies it to the high-temperature heating terminal C.

Further, for example, when only the low-temperature heating terminal A is operated, the heat source machine 3 adjusts the heating amount to generate low-temperature hot water (for example, hot water at 60 ° C.), and heat medium outbound path L12β from the hot water discharge port Pfa12. It is supplied to the header 30 via. The header 30 distributes the low-temperature hot water from the heat medium outbound path L12β to the heat medium outbound path L12βa and supplies it to the low-temperature heating terminal A. Similarly, when only the low-temperature heating terminal B is operated, low-temperature hot water is supplied to the header 30, and low-temperature hot water is supplied from the header 30 to the low-temperature heating terminal B via the heat medium outbound path L12βb.

Further, for example, when both the low temperature heating terminal A and the high temperature heating terminal C are operated, the heat source machine 3 generates medium temperature hot water (for example, 75 ° C. hot water) between high temperature and low temperature, and the hot water discharge port Pfa12. Is supplied to the header 30 via the heat medium outbound path L12β. The header 30 distributes medium-temperature hot water from the heat medium outbound path L12β to the heat medium outbound paths L12βa and L12βc and supplies them to the low-temperature heating terminals A and C. Since medium-temperature hot water is also supplied to the low-temperature heating terminal A, the amount of heat supplied to the low-temperature heating terminal A increases, but this is adjusted by shortening the opening / closing time of the thermal valve.

The low-temperature return hot water that has passed through the heating terminals A, B, and C is taken into the heat source machine 3 from the low-temperature hot water intake port Pr14 from the heat medium return paths L14βa, L14βb, and L14βc via the heat medium return path L14β, respectively, and is a heat medium. It is supplied to the heating tank 15 via the return path L14. In the general simple two-temperature heat source machine 3 of FIG. 2, hot water having a desired temperature is generated in each of the low-temperature heating terminals A and B and the high-temperature heating terminal C. Therefore, the bypass path L16 between the heat medium outbound path L12 and the heat medium return path L14, which is provided for mixing the high temperature hot water and the low temperature hot water in the two-temperature heat source machine 1, is not provided. ..

Further, the low-temperature hot water discharged from the heating tank 15 and flowing through the low-temperature heat medium outbound path L15 returns to the heat exchanger EX1 via the low-temperature heat medium supply path L11 without being discharged to the outside of the heat source machine 3.

As shown in FIG. 3, the above-mentioned header 30 is provided under the floor 6 away from the heat source machine 3 in the facility 5. This is because by arranging the header 30 near the heating terminals A, B, and C, the distributed hot water can be immediately supplied to the heating terminal, and the flow of the hot water is suppressed from being deteriorated. For example, if the heating terminals A, B, and C are separated from the header 30, the hot water pipe may become longer and the flow of hot water may be impaired.

(2) Change from simple two-temperature method to two-temperature method

(2-1) Configuration using a temperature system conversion unit Next, when a simple two-temperature system hot water circulation heating system 200 (Fig. 2) is adopted as an existing system, the simple two-temperature system hot water A case where a two-temperature type heat source machine 1 (heat source machine 1 of the two-temperature type hot water circulation heating system 100 in FIG. 1) is introduced instead of the heat source machine 3 of the circulation heating system 200 will be described.

As described above, the two-temperature heat source machine 1 has a high-temperature hot water discharge port Pf12 and a low-temperature hot water discharge port Pf15 for discharging high-temperature hot water and low-temperature hot water, respectively, as hot water discharge ports.

On the other hand, the simple two-temperature heat source machine 3 has only a hot water discharge port Pfa12 that discharges hot water at a desired temperature as a hot water discharge port. Therefore, the header 30 of the simple two-temperature system is provided with only one connection port 31 corresponding to one hot water discharge port Pfa12.

Therefore, when replacing the simple two-temperature heat source machine 3 with the two-temperature heat source machine 1, the two-temperature heat source machine 1 having two hot water discharge ports (high temperature hot water discharge port Pf12 and low temperature hot water discharge port Pf15). And a simple two-temperature type header 30 having one connection port 31 need to be connected.

Therefore, in the present embodiment, as shown in FIG. 4, a temperature conversion unit 40 is provided between the two-temperature heat source machine 1 and the simple two-temperature header 30.

The hot water circulation heating system 110 shown in FIG. 4 includes a general two-temperature heat source machine 1, heating terminals A, B, C (low temperature heating terminals A, B, high temperature heating terminal C), and a heat source machine 2. It includes a temperature conversion unit 40. The heat source machine 1, the heat source machine 2, and the heating terminals A, B, and C of the hot water circulation heating system 110 of FIG. 4 are the general two-temperature type heat source machine 1, the heat source machine 2, and the heating terminals A and B of FIG. 1, respectively. Since it is the same as C, the description thereof will be omitted.

The temperature conversion unit 40 is provided between the high temperature hot water discharge port Pf12 and the low temperature hot water discharge port Pf15 of the heat source machine 1 and the connection port 31 of the header 30. More specifically, the temperature conversion unit 40 has an inlet 41, an inlet 42, and an outlet 43, and the inlet 41 has a high temperature heat medium outbound path L12γd connected to the high temperature hot water discharge port Pf12 of the heat source machine 1. The inlet 42 is connected to the low temperature heat medium outbound path L15γ connected to the low temperature hot water discharge port Pf15, and the outlet 43 is connected to the heat medium outbound path L12γe connected to the connection port 31 of the header 30. It is connected. The high-temperature heat medium outbound path L12γd and the heat medium outbound path L12γe can be used by dividing the heat medium outbound path L12β of the simple two-temperature system shown in FIG. The low-temperature heat medium outbound path L15γ is a pipe newly laid from the low-temperature hot water discharge port Pf15 to the connection port 31 of the header 30.

The temperature conversion unit 40 includes a three-way valve (regulatory valve) 50, a temperature detector T, and a control unit 60. The three-way valve 50 is provided between the two inlets 41, 42 and the outlet 43 of the temperature conversion unit 40, and the housing 51 having three openings corresponding to the two inlets 41, 42 and one outlet 43, respectively. , And a valve body 53 in the housing 51. The three-way valve 50 adjusts the flow rates of the hot water and the cold water introduced from the two inlets 41 and 42 and guides them to one outlet 43.

The control unit 60 adjusts by rotating the valve body 53 of the three-way valve 50 to control the flow rates of the high-temperature hot water from the high-temperature heat medium outbound path L12γd and the low-temperature hot water from the low-temperature heat medium outbound path L15γ. Thereby, hot water having a desired temperature can be guided to the outlet 43 of the temperature conversion unit 40.

Further, the temperature detector T is provided between the three-way valve 50 and the outlet 43, and detects the temperature of hot water from the three-way valve 50 toward the outlet 43. It is preferable that the control unit 60 controls the three-way valve 50 based on the temperature of the hot water detected by the temperature detector T. Since the three-way valve 50 is controlled based on the temperature of the hot water detected by the temperature detector T, the hot water having a desired temperature can be guided to the outlet 43 of the temperature conversion unit 40. In particular, in order to detect the temperature of the hot water on the outlet 43 side of the temperature conversion unit 40, it is possible to guide the hot water of a desired temperature to the connection port 31 of the header 30.

The control of the valve body 53 by the three-way valve 50 will be further described with reference to FIGS. 5 to 7.

For example, when only the high-temperature heating terminal C is operated, the control unit 60 controls the valve body 53 so that the high-temperature heat medium outbound path L12γd and the heat medium outbound path L12γe communicate with each other as shown in FIG. As a result, the high-temperature hot water from the high-temperature heat medium outbound path L12γd is discharged to the heat medium outbound path L12γe. Therefore, high temperature hot water is supplied to the header 30. The header 30 distributes high-temperature hot water to the high-temperature heating terminal C via the heat medium outbound path L12βc.

At this time, the communication between the low temperature heat medium outbound path L15γ and the three-way valve 50 is cut off, and the low temperature hot water from the low temperature heat medium outbound path L15γ is not discharged to the heat medium outbound path L12γe.

For example, when only the low-temperature heating terminal A (or B) is operated, the control unit 60 makes the valve body 53 communicate with the low-temperature heat medium outbound path L15γ and the heat medium outbound path L12γe as shown in FIG. To control. As a result, the low-temperature hot water from the low-temperature heat medium outbound path L15γ is discharged to the heat medium outbound path L12γe. Therefore, low temperature hot water is supplied to the header 30. The header 30 distributes low-temperature hot water to the low-temperature heating terminal A (or B) via the heat medium outbound path L12βa (or L12βb).

At this time, the communication between the high temperature heat medium outbound path L12γd and the three-way valve 50 is cut off, and the high temperature hot water from the high temperature heat medium outbound path L12γd is not discharged to the heat medium outbound path L12γe.

For example, when the high-temperature heating terminal C and the low-temperature heating terminal A (or B) are operated together, the control unit 60 sets the valve body 53 with the high-temperature heat medium outbound path L12γd and the heat medium outbound path as shown in FIG. It is controlled so that the L12γe partially communicates with each other and the low temperature heat medium outbound path L15γ and the heat medium outbound path L12γe partially communicate with each other. As a result, a part of the high-temperature hot water from the high-temperature heat medium outbound path L12γd is discharged to the heat medium outbound path L12γe. Further, a part of the low-temperature hot water from the low-temperature heat medium outbound path L15γ is discharged to the heat medium outbound path L12γe. Therefore, hot water in a state in which high-temperature hot water and low-temperature hot water are mixed is supplied to the header 30. The header 30 distributes the hot water to the high-temperature heating terminal C via the heat medium outbound path L12βc and the hot water to the low-temperature heating terminal A (or B) via the heat medium outbound path L12βa (or L12βb).

The low-temperature return hot water that has passed through the heating terminals A, B, and C is taken into the heat source machine 1 from the heat medium return paths L14βa, L14βb, and L14βc via the heat medium return path L14β from the low-temperature hot water intake port Pr14, respectively.

According to the above feature configuration, the temperature conversion unit 40 is interposed between the two-temperature heat source machine 1 and the simple two-temperature header 30. Specifically, the temperature conversion unit 40 has two inlets 41 and 42 on the upstream side and one outlet 43 on the downstream side. The two inlets 41 and 42 on the upstream side correspond to the two hot water discharge ports Pf12 and Pf15 (high temperature hot water discharge port Pf12 and low temperature hot water discharge port Pf15) of the two-temperature heat source machine 1, respectively. Further, one outlet 43 on the downstream side corresponds to one connection port 31 of the header 30 of the simple two-temperature system. When switching from a simple two-temperature heat source machine 3 having one hot water discharge port Pfa12 to a two-temperature heat source machine 1 having two hot water discharge ports Pf12 and Pf15, a new hot water discharge port (hot water discharge port) It is either Pf12 or Pf15, and in the above, the low temperature hot water discharge port Pf15 in FIG. 4 is increased by one, and a pipe for allowing hot water to flow from the hot water discharge port (in the above, the low temperature heat medium in FIG. 4) Road L15γ) needs to be newly laid.

When the above temperature conversion unit 40 is adopted, a new pipe is laid from the new hot water discharge port to the temperature conversion unit 40 in front of the connection port 31 of the simple two-temperature header 30. It is sufficient, and there is no need to newly lay a long pipe from the new hot water discharge port to the connection port 31 of the header 30. For example, when the header 30 is arranged under the floor or the like, it may be difficult to lay the pipe leading to the header 30 due to reasons such as a narrow work space or darkness. By providing the temperature system conversion unit 40 having the above configuration, such difficulties can be avoided, and the hot water circulation heating system can be easily constructed by applying the two-temperature system heat source machine 1 to the simple two-temperature system hot water circulation heating system. It is possible.

The temperature conversion unit 40 is a two-temperature system among the flow paths (high temperature heat medium outbound path L12γd, heat medium outbound path L12γe) between the two-temperature system heat source machine 1 and the simple two-temperature system header 30. It is preferable that the heat source machine 1 is provided at a position close to the above. In this case, the temperature system conversion unit 40 can be easily laid, and the temperature system can be easily changed from the simple two-temperature system hot water circulation heating system to the two-temperature system hot water circulation heating system. In particular, when the header 30 is provided under the floor or the like, it is difficult to provide the temperature conversion unit 40 in the vicinity of the header 30 due to reasons such as a narrow working space and darkness. Therefore, in such a case, it is effective to provide the temperature system conversion unit 40 at a position close to the two-temperature system heat source machine 1.

(2-2) Configuration without using the temperature system conversion unit In the above, one of the merits of using the temperature system conversion unit 40 is that even if the temperature system is changed, the connection port of the header 30 is connected to the new hot water discharge port. He explained that there is no need to newly lay a long pipe up to 31. This point will be described with reference to FIG. 8 of a configuration in which the above temperature conversion unit 40 is not used.

In the hot water circulation heating system 120 shown in FIG. 8, in the simple two-temperature type hot water circulation heating system 200 of FIG. 2, the header 30, the heating terminals A, B, C, the piping, and the like are used as they are, and the simple two-temperature type heat source Instead of the machine 3, the two-temperature type heat source machine 1 shown in FIG. 1 is introduced. Then, in FIG. 8, the temperature conversion unit 40 described above is not used.

In order to introduce the two-temperature type heat source machine 1, the heat source machine 3 is removed in the simple two-temperature type hot water circulation heating system 200 of FIG. In this case, the heat medium outbound path L12β connected to the connection port 31 of the header 30 remains. Further, the outlets 32a, 32b, and 32c of the header 30 are in a state of being connected to the heating terminals A, B, and C via the heat medium outbound paths L12βa, L12βb, and L12βc, respectively. In this state, when a two-temperature heat source machine 1 having a high-temperature hot water discharge port Pf12 and a low-temperature hot water discharge port Pf15 is introduced as hot water discharge ports, one of these two hot water discharge ports is connected. There is no.

That is, in the simple two-temperature hot water circulation heating system 200 of FIG. 2, since only one hot water discharge port Pfa12 is provided as the hot water discharge port, one hot water discharge port Pfa12 and one connection port 31 of the header 30 are provided. Is connected by a heat medium outbound path L12β. However, the two-temperature heat source machine 1 has a low-temperature hot water discharge port Pf15 in addition to the high-temperature hot water discharge port Pf12, and has two hot water discharge ports. Therefore, it is not possible to easily connect the two-temperature heat source machine 1 having two hot water discharge ports to the header 30 having only one connection port 31.

Therefore, the following method can be considered as a method of supplying hot water to the heating terminals A, B, and C from the two high-temperature hot water discharge ports Pf12 and the low-temperature hot water discharge port Pf15 of the replaced two-temperature heat source machine 1.

As one method, as shown in FIG. 8, while using the heat medium outbound path L12β connecting the hot water discharge port Pfa12 of FIG. 2 and the connection port 31 of the header 30 as it is, with the high temperature hot water discharge port Pf12. The high temperature heat medium outbound path L12δ for connecting to the high temperature heating terminal C is changed. As a result, high-temperature hot water is supplied from the heat source machine 1 to the high-temperature heating terminal C via the high-temperature hot water discharge port Pf12 and the high-temperature heat medium outbound path L12δ.

Further, a low temperature heat medium outbound path L15δ for connecting the low temperature hot water discharge port Pf15 and the connection port 31 of the header 30 is newly provided. As a result, low-temperature hot water is sent from the heat source machine 1 to the low-temperature heating terminal A (or B) via the low-temperature hot water discharge port Pf15, the new low-temperature heat medium outbound path L15δ, the header 30, and the heat medium outbound path L12βa (or L12βb). Is supplied.

As described above, when the two-temperature heat source machine 1 is introduced in place of the heat source machine 3 in the simple two-temperature hot water circulation heating system 200 without adopting the temperature conversion unit 40, the hot water discharge port It is necessary to lay a separate new pipe (in FIG. 8 above, the low temperature heat medium outbound route L15δ) connecting the header 30 and the header 30, and change the pipe route. In particular, when the header 30 of the simple two-temperature system is provided at a place away from the heat source machine 1, there is a difficulty that the piping to be laid becomes long. Further, when the header 30 is provided under the floor 6 of the facility 5 and the hot water pipe is laid from the heat source machine 1 of the two-temperature system to the header 30 of the simple two-temperature system, it is difficult to lay the pipe. ..

Therefore, by providing the temperature system conversion unit 40 as described above, the two-temperature system heat source machine can be applied to the simple two-temperature system hot water circulation heating system without laying new piping. Can be easily constructed.

[Other Embodiments]
The configurations disclosed in the above-described embodiments (including other embodiments, the same shall apply hereinafter) can be applied in combination with the configurations disclosed in the other embodiments as long as there is no contradiction. , The embodiments disclosed in the present specification are examples, and the embodiments of the present invention are not limited thereto, and can be appropriately modified without departing from the object of the present invention.

(1) In the above embodiment, the header 30 is provided in the facility 5 under the floor 6 away from the heat source machine 3. However, the position of the header 30 is not limited to under the floor, and may be provided at a position away from the heat source machine 3 where it is difficult to lay a new pipe to the header 30.

(2) In the above embodiment, three low-temperature heating terminals A and B and a high-temperature heating terminal C are provided, but the number of heating terminals is not limited to this. For example, the number of low-temperature heating terminals may be one, or may be three or more. Further, the number of high temperature heating terminals may be two or more.

(3) In the above embodiment, two types of hot water, low temperature and high temperature, are given as examples of the temperature of the hot water generated by the two-temperature heat source machine 1, but the medium temperature between the low temperature and the high temperature is also given as the temperature of the hot water. Be done. In this case, a heating terminal corresponding to the medium temperature may be provided. For example, the two low-temperature heating terminals A and B of the above embodiment may be the low-temperature heating terminal A and the medium-temperature heating terminal B. The medium temperature hot water is generated by adjusting the mixing ratio of the high temperature hot water and the return hot water from the heating terminals A, B, and C.

1: Heat source machine 3: Heat source machine 30: Header (hot water distributor)
31: Connection port 40: Temperature system conversion unit 41: Inlet 42: Inlet 43: Outlet 50: Three-way valve 60: Control unit 100: Hot water circulation heating system 110: Hot water circulation heating system 200: Hot water circulation heating system A, B, C : Heating terminal

Claims (6)

In a heat source machine used in a two-temperature hot water circulation heating system, two inlets corresponding to a high-temperature hot water outlet and a low-temperature hot water outlet for discharging two-temperature hot water of high-temperature hot water and low-temperature hot water, and
It is possible to discharge hot water introduced from the heat source machine through at least one of the two inlets, and corresponds to one connection port of a hot water distributor used in a simple two-temperature hot water circulation heating system. One exit and
A regulating valve provided between the two inlets and the outlets, which adjusts the flow rates of the hot water and the low temperature hot water introduced from the two inlets and guides them to the one outlet.
A temperature system conversion unit equipped with. The temperature system conversion unit according to claim 1, further comprising a control unit that controls the regulating valve to control the flow rates of the high-temperature hot water and the low-temperature hot water. A temperature detector for detecting the temperature of hot water flowing between the regulating valve and the outlet is provided.
The temperature system conversion unit according to claim 2, wherein the control unit controls the control valve based on the temperature of hot water detected by the temperature detector. The adjusting valve is a three-way valve having three switching ports, the two switching ports are connected to the two inlets, and one switching port is connected to the one outlet. The temperature conversion unit according to item 1. The two-temperature type hot water circulation heating system includes a high-temperature heating terminal and a low-temperature heating terminal.
When only the high temperature heating terminal is used, the regulating valve connects one inlet to which the hot hot water is discharged from the heat source machine and the one outlet.
When only the low temperature heating terminal is used, the regulating valve connects one inlet to which the low temperature hot water is discharged from the heat source machine and the one outlet.
When both the high temperature heating terminal and the low temperature heating terminal are used, the regulating valve has one inlet from which the hot water is discharged from the heat source machine and the low temperature hot water is discharged from the heat source machine. The temperature system conversion unit according to any one of claims 1 to 4, which connects one inlet and the one outlet. The temperature conversion unit is provided at a position close to the two-temperature heat source machine in the flow path between the two-temperature heat source machine and the simple two-temperature hot water distributor. Item 2. The temperature system conversion unit according to any one of Items 1 to 5.

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