JP7376921B2 - Heating and cooling supply system - Google Patents

Description

FIELD OF THE INVENTION The present invention generally relates to heating and cooling supply systems. More specifically, the present invention relates to a heating and cooling supply system that effectively utilizes a groundwater-based snow melting tank.

Conventionally, many electric heater and combustion-type snow melting tanks have been sold. Additionally, various systems have been proposed for providing heating and cooling in homes. On the other hand, in cold, snowy regions, more and more homes are installing snow melting tanks that use groundwater.

The present invention makes effective use of snow melting tanks that utilize groundwater, which are often installed in snowy and cold regions, is easy for users to use, can be used for snow melting, and reduces operating costs and ease of operation. The aim is to provide a heating and cooling supply system that makes it possible to

A snow melting tank, a heat pump, a groundwater pumping device for supplying groundwater to the snow melting tank, and a heating machine and a cooling machine installed indoors, respectively, as described in claim 1 of the present application, The heating and cooling supply system in which the free cooling mode can be selected includes a primary side piping system that connects the snow melting tank and the primary side circuit of the heat pump in a circulating state, and a secondary side circuit of the heat pump and the heating machine or the It further includes a secondary piping system that connects the air conditioner in a circulating state, and in the heating mode, when the water temperature in the snow melting tank is below a predetermined set temperature, the underground water pumping device is activated to melt the snow. Ground water is supplied to the tank, the water temperature of the snow melting tank is raised to the set temperature or higher, and in the cooling mode or the free cooling mode, the water temperature of the snow melting tank is set to a predetermined set temperature. In the above case, the groundwater pumping device is operated to supply groundwater to the snow melting tank, the water temperature in the snow melting tank is lowered to the set temperature or lower, and the heating mode is set. In this case, a heat medium is supplied to the heater through the secondary piping system by causing heat transfer from the primary circuit to the secondary circuit, and in the cooling mode, the primary circuit The refrigerant is supplied to the air conditioner through the secondary piping system by causing heat transfer from the snow melting tank to the air conditioner. It is characterized in that it is configured so that it is directly circulated.

The heating and cooling supply system according to claim 2 of the present application is the system according to claim 1, further comprising a snow melting mode, and in the snow melting mode, the groundwater pumping device is operated to supply groundwater to the snow melting tank. The snow melting tank is characterized in that it is configured to increase the water temperature in the snow melting tank.

According to the present invention, the rise and fall of the water temperature in the snow melting tank is adjusted according to each selected mode (heating mode, cooling mode, free cooling mode), so it is possible to reduce operating costs while making full use of the snow melting tank. can do. Furthermore, since it is only necessary to select the mode to be used using the controller, it is possible to provide an easy-to-use system for the user.

1 is a schematic diagram showing the entire heating and cooling supply system according to a preferred embodiment of the present invention. It is an enlarged view showing a snow melting tank. It is a schematic diagram showing the piping system below the heat pump and inside the piping box. FIG. 3 is a schematic diagram showing the operating state of the piping system in heating mode. FIG. 3 is a schematic diagram showing the operating state of the piping system in the cooling mode. FIG. 3 is a schematic diagram showing the operating state of the piping system in free cooling mode.

Next, a heating and cooling supply system according to a preferred embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 is a schematic diagram showing the entire heating and cooling supply system according to a preferred embodiment of the present invention. A heating and cooling supply system according to a preferred embodiment of the present invention, generally indicated by the reference numeral 10 in FIG. 1, includes a snow melting tank 12 installed outdoors. The snow melting tank 12 is of a type that uses underground water.

As shown in FIG. 2, the snow melting tank 12 includes a main body 12a, an openable and closable lid 12b disposed at the upper end of the main body 12a, a heat collecting coil 12c disposed inside the main body 12a, and a heat collecting coil 12c disposed inside the main body 12a. It has an underground water supply pipe 12d arranged in the main body 12a, a drain pipe 12e for discharging the water stored inside the main body 12a, and a temperature sensor 12f for detecting the temperature of the water stored inside the main body 12a. ing. The heat collecting coil 12c is connected to a piping system of a heat pump 14, which will be described later, the groundwater supply pipe 12d is connected to a groundwater pump 22b, which will be described later, and the drain pipe 12e is connected to a sewage tank 24, which will be described later.

Note that the illustrated snow melting tank 12 is a known one, and other snow melting tanks may be used as long as they are of a type that utilizes groundwater.

The heating and cooling supply system 10 also includes a heat pump 14 , and a piping box 16 is disposed below the heat pump 14 . FIG. 3 is a schematic diagram showing the piping system below the heat pump 14 and inside the piping box 16. In FIG. 3, reference numerals 14a, 14b, 14c, and 14d indicate a primary outflow port, a primary inflow port, a secondary outflow port, and a secondary inflow port of the heat pump 14, respectively. Note that the configuration of the heat pump 14 itself (for example, the primary side circuit and the secondary side circuit) is well known, so a detailed explanation will be omitted.

The primary side outlet 14a of the heat pump 14 is connected to the input side 12c1 of the heat collecting coil 12c of the snow melting tank 12 via a pipe 16a, and the primary side inlet 14b is connected to the snow melting tank 12 via a pipe 16b. is connected to the output side 12c2 of the heat collecting coil 12c, thereby forming a primary side piping system that connects the snow melting tank 12 and the primary side circuit of the heat pump 14 in a circulating state. A first three-way valve A is disposed in the pipe 16b, and an input port A1 of the first three-way valve A is connected to the pipe 16b leading to the output side 12c2 of the heat collecting coil 12c, and an output port of the first three-way valve A A2 is connected to a pipe 16b leading to the primary side inlet 14b.

Between the primary side circuit of the heat pump 14 and the snow melting tank 12 (that is, the primary side outlet 14a, the piping 16a, the heat collection coil 12c, the piping 16b, the primary side inlet 14b, the primary side circuit of the heat pump 14) A first heat medium (for example, antifreeze) flows through the first heat medium, and the first heat medium is circulated by a primary side circulation pump (not shown).

The secondary side outflow port 14c of the heat pump 14 is connected to the input side of utilization equipment (heater 18, cooling device 20), which will be described later, via the supply pipe 16c, and the secondary side inflow port 14d is connected to the return pipe 16d. It is connected to the output side of the equipment used (heater 18, air conditioner 20) through the heat pump 14, thereby forming a secondary piping system that connects the secondary circuit of the heat pump 14 and the equipment used in a circulating state. Ru. A second three-way valve B is disposed in the supply pipe 16c, and the input port B1 of the second three-way valve B is connected to the supply pipe 16c leading to the secondary outlet 14c, and the output port of the second three-way valve B B2 is connected to a supply pipe 16c that reaches the input side of the equipment to be used (heater 18, air conditioner 20).

Between the secondary circuit of the heat pump 14 and the equipment used (heater 18, air conditioner 20) (i.e., the secondary outlet 14c, the supply pipe 16c, the equipment 18, 20, the return pipe 16d, the primary flow A second heat medium (for example, antifreeze) flows through the inlet 14d and the secondary circuit of the heat pump 14, and the second heat medium is circulated by a secondary circulation pump (not shown). ing.

A third three-way valve C is arranged in the indoor supply pipe 16c. The supply pipe 16c from the secondary outlet 14c is connected to the inlet C1 of the third three-way valve C, the supply pipe 16c leading to the heater 18 is connected to the heater outlet C2, and the air conditioner flow A supply pipe 16c leading to the air conditioner 20 is connected to the outlet C3. A return pipe 16d connected to the output side of the heater 18 and a return pipe 16d connected to the output side of the air conditioner 20 join in the middle and reach the secondary side inlet 14d of the heat pump 14.

A branch pipe 16e coming out of the branch port A3 of the first three-way valve A joins a supply pipe 16c coming out of the output port B2 of the second three-way valve B. Further, a branch pipe 16f coming out of the branch port B3 of the second three-way valve B joins the pipe 16a.

The heating and cooling supply system 10 also includes a groundwater pumping device 22 and a sewage tank 24, each of which is installed outdoors.

The groundwater pumping device 22 has a main body 22a, a groundwater pump 22b disposed in the main body 22a, and a pumping pipe 22c for pumping up groundwater. It is connected to the supply pipe 12d. When the groundwater pump 22b is operated, the groundwater pumped up through the pumping pipe 22c is supplied to the snow melting tank 12 through the groundwater supply pipe 12d. Controller 80 is installed indoors in a building where solar cell module 2 is installed. The controller 80 includes a CPU (Central Processing Unit), a storage unit (for example, a memory), and controls the heater 30 by causing the CPU to execute a control program stored in the storage unit.

The heating and cooling supply system 10 further includes a controller (not shown) for controlling the operation of the system, and each device (heat pump 14, temperature sensor 12f, underground water pump 22b, three-way valves A, B, C, etc.). ) is connected to the controller wirelessly or by wire. The controller includes a CPU (Central Processing Unit), a storage unit (for example, a memory), and controls the system 10 by causing the CPU to execute a control program stored in the storage unit. For example, a tablet terminal is used as the controller.
Controller 80 is installed indoors in a building where solar cell module 2 is installed. The controller 80 includes a CPU (Central Processing Unit), a storage unit (for example, a memory), and controls the heater 30 by causing the CPU to execute a control program stored in the storage unit. Controller 80 is installed indoors in a building where solar cell module 2 is installed. The controller 80 includes a CPU (Central Processing Unit), a storage unit (for example, a memory), and controls the heater 30 by causing the CPU to execute a control program stored in the storage unit.

Next, a method of operating the heating and cooling supply system 10 configured as described above will be described. The heating and cooling supply system 10 has four modes: heating mode, cooling mode, free cooling mode, and snow melting mode. Here, the free cooling mode is a system that directly utilizes low-temperature water from the snow melting tank 12 for cooling without going through the heat pump 14 during the summer when the outside temperature is high.

First, the user turns on the controller and selects one of the four modes.

When the heating mode is selected, the procedure is as follows. FIG. 4 is a piping diagram showing the flow of the second heat medium (heat medium) in the heating mode. The temperature sensor 12f detects the water temperature T in the snow melting tank 12, and when the water temperature T is below a predetermined set temperature _T0 (T≦ _T0 ), the groundwater pump 22b is activated and pumps up groundwater through the pumping pipe 22c. Then, groundwater is supplied to the snow melting tank 12 through the groundwater supply pipe 12d. As a result, the water temperature T in the snow melting tank 12 increases. When the water temperature T of the snow melting tank 12 reaches the set temperature T ₀ , the operation of the groundwater pump 22b is stopped, and the supply of groundwater to the snow melting tank 12 is stopped.

When heating mode is selected, the first three-way valve A is opened to the pipe 16b side (A2 side), and the second three-way valve B is opened to the supply pipe 16c side (B2 side). Then, the third three-way valve C is opened to the heater 18 side (C2 side). As a result, the second heat medium (heat medium) flowing out from the secondary outlet 14c of the heat pump 14 passes through the supply pipe 16c and reaches the heater 18, as shown by the black arrow in FIG. As shown by the arrow, it flows into the secondary outlet 14d through the return pipe 16d.

In the heating mode, the first heat medium is circulated between the snow melting tank 12 in which water with a set temperature T ₀ or higher is stored and the primary circuit of the heat pump 14, and the first heat medium is circulated between the primary circuit of the heat pump 14 and the secondary circuit of the heat pump 14. The second heat medium (heat medium) is circulated between the secondary circuit of the heat pump 14 and the heater 18, and is used to heat the room. Since hot water with a temperature higher than the set temperature T ₀ is used, efficient heating is possible.

When the cooling mode is selected, the process is as follows. FIG. 5 is a piping diagram showing the flow of the second heat medium (refrigerant) in the cooling mode. The temperature sensor 12f detects the water temperature T in the snow melting tank 12, and when the water temperature T is equal to _or higher than a predetermined set temperature T0 (T≧ _T0 ), the groundwater pump 22b is activated and pumps up groundwater through the pumping pipe 22c. Then, groundwater is supplied to the snow melting tank 12 through the groundwater supply pipe 12d. As a result, the water temperature T in the snow melting tank 12 decreases. When the water temperature T of the snow melting tank 12 reaches the set temperature _T0 , the operation of the groundwater pump 22b is stopped, and the supply of groundwater to the snow melting tank 12 is stopped.

When the cooling mode is selected, the first three-way valve A is opened to the pipe 16b side (A2 side), and the second three-way valve B is opened to the supply pipe 16c side (B2 side). , and the third three-way valve C is open to the air conditioner 20 side (C3 side). As a result, the second heat medium (refrigerant) flowing out from the secondary outlet 14c of the heat pump 14 passes through the supply pipe 16c and reaches the air conditioner 20, as shown by the white arrow in FIG. As shown, it flows into the secondary outlet 14d through the return pipe 16d.

In the cooling mode, the first heat medium is circulated between the snow melting tank 12 in which water at a set temperature _T0 or lower is stored and the primary circuit of the heat pump 14, and the first heat medium is circulated from the primary circuit to the secondary circuit of the heat pump 14. The second heat medium (refrigerant) is circulated between the secondary circuit of the heat pump 14 and the air conditioner 20 to cool the room. Since cold water with a temperature below the set temperature T ₀ is used, efficient cooling is possible.

When the free cooling mode is selected, the process is as follows. FIG. 6 is a piping diagram showing the flow of the cold water medium in the free cooling mode. The temperature sensor 12f detects the water temperature T in the snow melting tank 12, and when the water temperature T is equal to _or higher than a predetermined set temperature T0 (T≧ _T0 ), the groundwater pump 22b is activated and pumps up groundwater through the pumping pipe 22c. Then, groundwater is supplied to the snow melting tank 12 through the groundwater supply pipe 12d. As a result, the water temperature T in the snow melting tank 12 decreases. When the water temperature T of the snow melting tank 12 reaches the set temperature _T0 , the operation of the groundwater pump 22b is stopped, and the supply of groundwater to the snow melting tank 12 is stopped.

When the free cooling mode is selected, the first three-way valve A is opened to the branch pipe 16e side (A3 side), and the second three-way valve B is opened to the branch pipe 16f side (B3 side). In this state, the third three-way valve C is opened to the air conditioner 20 side (C3 side). As a result, the cold water medium from the heat collecting coil 12c of the snow melting tank 12 passes from the pipe 16b, through the branch pipe 16e, and then through the supply pipe 16c to the air conditioner 20, as shown by the white arrow in FIG. As shown by the arrow, it flows into the secondary side inlet 14d through the return pipe 16d, and flows from the secondary side circuit to the secondary side outlet 14c, then through the branch pipe 16f and the pipe 16a to the snow melting tank 12. It is designed to reach the heating coil 12c.

In the free cooling mode, a refrigerant is directly circulated between the snow melting tank 12 in which water at a set temperature T ₀ or lower is stored and the air conditioner 20, and is used to cool the room. Since cold water below the set temperature T ₀ is directly used, the temperature of the cold water is higher than in the cooling mode, but the heat pump does not operate, making it possible to achieve more energy-saving cooling.

When the snow melting mode is selected, the groundwater pump 22b is operated, pumps up groundwater through the pumping pipe 22c, and supplies the groundwater to the snow melting tank 12 through the groundwater supply pipe 12d. As a result, the water temperature T in the snow melting tank 12 increases. After a predetermined set time t (for example, 15 minutes to 2 hours) has elapsed, the operation of the groundwater pump 22b is stopped. By repeating such a state, the water temperature in the snow melting tank 12 is kept constant, so that the snow put into the snow melting tank 12 can be easily melted.

The snow melting mode may be selected alone or together with the heating mode.

Note that the user can arbitrarily set the above-mentioned set temperature T in the controller.

The present invention is not limited to the embodiments of the invention described above, and various modifications can be made within the scope of the invention described in the claims, and these are also included within the scope of the present invention. Needless to say, it is something that

10 Air conditioning supply system 12 Snow melting tank 12a Main body 12b Lid 12c Heat collecting coil 12d Groundwater supply pipe 12e Drain pipe 12f Temperature sensor 14 Heat pump 14a Primary side outflow port 14b Primary side inflow port 14c Secondary side outflow port 14d Secondary side flow Inlet 16 Piping box 16a Piping 16b Piping 16c Piping (supply pipe)
16d Piping (return pipe)
16e Branch piping 16f Branch piping 18 Heating machine 20 Air conditioner 22 Groundwater pumping device 22a Main body 22b Groundwater pumping pump 22c Pumping pipe 24 Sewage tank A First three-way valve A1 Input port A2 Output port A3 Branch port B Second three-way valve B1 Input Port B2 Output port B3 Branch port C Third three-way valve C1 Input port C2 Output port for heating machine C3 Output port for cooling machine

Claims (2)

A heating and cooling supply that includes a snow melting tank, a heat pump, a groundwater pumping device that supplies groundwater to the snow melting tank, and a heating machine and a cooling machine that are installed indoors, and can select heating mode, cooling mode, or free cooling mode. A system,
A primary side piping system that connects the snow melting tank and the primary circuit of the heat pump in a circulating state; and a secondary side that connects the secondary circuit of the heat pump and the heating machine or the cooling machine in a circulating state. It further includes a piping system,
In the heating mode, when the water temperature of the snow melting tank is below a predetermined set temperature, the groundwater pumping device is operated to supply groundwater to the snow melting tank, and the water temperature of the snow melting tank is increased to increase the water temperature. to the set temperature or higher,
In the cooling mode or the free cooling mode, when the water temperature in the snow melting tank is equal to or higher than a predetermined set temperature, the groundwater pumping device is operated to supply groundwater to the snow melting tank, and the water temperature in the snow melting tank is adjusted. lowering the water temperature to the set temperature or lower;
In the heating mode, a heat medium is supplied to the heater through the secondary piping system by causing heat transfer from the primary circuit to the secondary circuit,
In the cooling mode, a refrigerant is supplied to the air conditioner through the secondary piping system by causing heat transfer from the primary circuit to the secondary circuit;
The heating and cooling supply system is characterized in that, in the free cooling mode, a refrigerant is directly circulated between the snow melting tank and the air conditioner. It also has a snow melting mode.
The snow melting mode is configured to operate the groundwater pumping device to supply groundwater to the snow melting tank and increase the water temperature in the snow melting tank. Heating and cooling supply system.

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