JP2021152418A - Cooling/heating supply system - Google Patents

Abstract

To provide a cooling/heating supply system which is user-friendly, which can be used to melt snow, and which has achieved reduction in operation cost and simple operability.SOLUTION: A cooling/heating supply system includes: a primary side piping system for connecting a snow melting tank and a primary side circuit of a heat pump in a circulation state; and a secondary side piping system for connecting a secondary side circuit of the heat pump and a heater or a cooler in a circulation state. A device for pumping underground water is selectively actuated, and the water temperature of the snow melting tank is set to be equal to or greater than, or equal to or less than a preset temperature. In a heating mode, a heating medium is supplied to the heater by generating heat transfer from the primary side circuit to the secondary side circuit, and in a cooling mode, a refrigerant is supplied to the cooler by generating heat transfer from the primary side circuit to the secondary side circuit. In a free cooling mode, the refrigerant is directly circulated between the snow melting tank and the cooler.SELECTED DRAWING: Figure 1

Description

The present invention generally relates to a heating and cooling supply system. More specifically, the present invention relates to an air-conditioning supply system that effectively utilizes a groundwater-based snowmelt tank.

Conventionally, many electric heaters and combustion-type snowmelt tanks have been sold. In addition, various systems for providing air conditioning in a house have been proposed. On the other hand, in cold regions with snow, there are increasing cases of installing snowmelt tanks that use groundwater in houses.

The present invention makes effective use of a snowmelt tank that uses groundwater, which is often installed in cold regions with snow, is easy for users to use, can be used for snowmelt, and reduces operating costs and simple operability. The purpose is to provide a heating and cooling supply system that has made it possible.

A heating mode, a cooling mode, or a heating mode, which includes a snow melting tank, a heat pump, a ground water pumping device for supplying ground water to the snow melting tank, and a heater and a cooling machine installed indoors, respectively, according to claim 1 of the present application. The heating / 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, a secondary side circuit of the heat pump and the heater or the heater. A secondary side piping system for connecting the cooler to the circulation state is further provided. In the heating mode, when the water temperature of the snow melting tank is equal to or lower than a predetermined set temperature, the ground water pumping device is operated to melt the snow. Ground water is supplied to the tank, the water temperature of the snow melting tank is raised to bring the water temperature 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 device for pumping ground water is operated to supply ground water to the snow melting tank, and the water temperature of the snow melting tank is lowered to bring the water temperature to the set temperature or lower, and the heating mode is used. Then, by causing heat transfer from the primary side circuit to the secondary side circuit, a heat medium is supplied to the heater through the secondary side piping system, and in the cooling mode, the primary side circuit By causing heat transfer to the secondary side circuit, a refrigerant is supplied to the cooling machine through the secondary side piping system, and in the free cooling mode, the refrigerant is supplied between the snow melting tank and the cooling machine. Is characterized in that it is configured to be directly circulated.

The heating / cooling supply system according to claim 2 of the present application further includes a snowmelt mode in the system of claim 1, and in the snowmelt mode, the groundwater pumping device is operated to supply groundwater to the snowmelt tank. It is characterized in that it is configured to raise the water temperature of the snowmelt tank.

According to the present invention, the rise and fall of the water temperature of the snowmelt tank is adjusted according to each selected mode (heating mode, cooling mode, free cooling mode), so that the operating cost can be reduced while utilizing the snowmelt tank. can do. Moreover, since it is only necessary to select the mode to be used with the controller, it is possible to provide a system that is easy for the user to use.

It is a schematic diagram which showed the whole of the air-conditioning supply system which concerns on a preferable embodiment of this invention. It is an enlarged view which showed the snowmelt tank. It is a schematic diagram which showed the piping system below the heat pump and the inside of a piping box. It is a schematic diagram which showed the operating state of a piping system in a heating mode. It is a schematic diagram which showed the operating state of a piping system in a cooling mode. It is a schematic diagram which showed the operating state of a piping system in a free cooling mode.

Next, the air-conditioning supply system according to the preferred embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 is a schematic view showing the entire air-conditioning supply system according to a preferred embodiment of the present invention. The air-conditioning supply system according to the preferred embodiment of the present invention, which is indicated by reference numeral 10 as a whole in FIG. 1, includes a snowmelt tank 12 installed outdoors. The snowmelt tank 12 is of a type that uses groundwater.

As shown in FIG. 2, the snowmelt tank 12 includes a main body 12a, an openable and closable lid 12b arranged at the upper end of the main body 12a, a heat collecting coil 12c arranged inside the main body 12a, and the inside of the main body 12a. It has a groundwater supply pipe 12d arranged in, a drainage 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 the piping system of the heat pump 14 described later, the groundwater supply pipe 12d is connected to the groundwater pump 22b described later, and the drain pipe 12e is connected to the sewage tank 24 described later.

The illustrated snowmelt tank 12 is a known one, and another snowmelt tank may be used as long as it is of a type that uses groundwater.

The air-conditioning supply system 10 also includes a heat pump 14, and a piping box 16 is arranged below the heat pump 14. FIG. 3 is a schematic view showing a piping system below the heat pump 14 and inside the piping box 16. In FIG. 3, reference numerals 14a, 14b, 14c, and 14d indicate the primary side outlet, the primary side inlet, the secondary side outlet, and the secondary side inlet of the heat pump 14, respectively. Since the configuration of the heat pump 14 itself (for example, the primary side circuit and the secondary side circuit) is known, detailed description thereof will be omitted.

The primary side outflow port 14a of the heat pump 14 is connected to the input side 12c1 of the heat collection coil 12c of the snowmelt tank 12 via the pipe 16a, and the primary side inflow port 14b is connected to the snowmelt tank 12 via the pipe 16b. It is connected to the output side 12c2 of the heat collection coil 12c, thereby forming a primary side piping system that connects the snowmelt tank 12 and the primary side circuit of the heat pump 14 in a circulating state. The first three-way valve A is arranged in the pipe 16b, the 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 collection coil 12c, and the output port of the first three-way valve A is connected. A2 is connected to the pipe 16b leading to the primary side inflow port 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 pipe 16a, the heat collection coil 12c, the pipe 16b, the primary side inlet 14b, the primary side circuit of the heat pump 14). A first heat medium (for example, antifreeze liquid) is flowing through the room, and the first heat medium is circulated by a primary side circulation pump (not shown).

The secondary side outlet 14c of the heat pump 14 is connected to the input side of the equipment (heater 18, cooler 20) described later via the supply pipe 16c, and the secondary side inlet 14d connects the return pipe 16d. It is connected to the output side of the equipment used (heater 18 and air conditioner 20) via a secondary side piping system that connects the secondary side circuit of the heat pump 14 and the equipment used in a circulating state. NS. A second three-way valve B is arranged 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 side outflow port 14c, and the output port of the second three-way valve B is connected. B2 is connected to the supply pipe 16c leading to the input side of the equipment used (heater 18, cooler 20).

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

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

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

The air-conditioning supply system 10 also includes a groundwater pumping device 22 and a sewage tank 24, which are installed outdoors, respectively.

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

The air-conditioning 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, groundwater pumping pump 22b, three-way valves A, B, C, etc.) ) Is connected to the controller wirelessly or by wire. The controller is composed of a CPU (Central Processing Unit), a storage unit (for example, a memory), and the like, and controls the system 10 by causing the CPU to execute a control program stored in the storage unit. As the controller, for example, a tablet terminal is used.
The controller 80 is installed indoors in the building where the solar cell module 2 is installed. The controller 80 is composed of a CPU (Central Processing Unit), a storage unit (for example, a memory), and the like, and controls the heater 30 by causing the CPU to execute a control program stored in the storage unit. The controller 80 is installed indoors in the building where the solar cell module 2 is installed. The controller 80 is composed of a CPU (Central Processing Unit), a storage unit (for example, a memory), and the like, and controls the heater 30 by causing the CPU to execute a control program stored in the storage unit.

Next, the operation method of the air-conditioning supply system 10 configured as described above will be described. The air-conditioning supply system 10 has four modes, that is, a heating mode, a cooling mode, a free cooling mode, and a snow melting mode. Here, the free cooling mode is a system that cools by directly using the low temperature water of the snowmelt tank 12 without passing through the heat pump 14 in the summer when the outside air temperature is high.

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

When the heating mode is selected, it is as follows. FIG. 4 is a piping diagram showing the flow of the second heat medium (heat medium) in the heating mode. When the water temperature T of the snowmelt tank 12 is detected by the temperature sensor 12f and the water temperature T is a predetermined set temperature T ₀ or less (T ≦ T ₀ ), the groundwater pump 22b operates to pump the groundwater through the pump pipe 22c. Then, the groundwater is supplied to the snowmelt tank 12 through the groundwater supply pipe 12d. As a result, the water temperature T of the snowmelt tank 12 rises. When the water temperature T of the snow melting tank 12 reaches the set temperature T _0, operation stops groundwater pumping pump 22b, it stops the supply of ground water to snow melting tank 12.

When the heating mode is selected, the first three-way valve A is open to the side of the pipe 16b (A2 side), and the second three-way valve B is open to the supply pipe 16c side (B2 side). The third three-way valve C is opened to the side of the heater 18 (the side of C2). As a result, the second heat medium (heat medium) flowing out from the secondary side outlet 14c of the heat pump 14 reaches the heater 18 through the supply pipe 16c as shown by the black arrow in FIG. 4, and is outlined. As shown by the arrow, it flows into the secondary side 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 having a set temperature T 0} or higher is stored and the primary side circuit of the heat pump 14, and the primary side circuit to the secondary side circuit of the heat pump 14 are circulated. A second heat medium (heat medium) is circulated between the secondary circuit of the heat pump 14 and the heater 18 to heat the room. Since hot water with a set temperature of T ₀ or higher is used, efficient heating is possible.

When the cooling mode is selected, it 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 of the snowmelt tank 12, and when the water temperature T is equal to or higher than the _{predetermined set temperature T 0 (T ≧ T 0} ), the groundwater pump 22b operates to pump the groundwater through the pumping pipe 22c. Then, the groundwater is supplied to the snowmelt tank 12 through the groundwater supply pipe 12d. As a result, the water temperature T of the snowmelt tank 12 drops. When the water temperature T of the snow melting tank 12 reaches the set temperature T _0, operation stops groundwater pumping pump 22b, it stops the supply of ground water to snow melting tank 12.

When the cooling mode is selected, the first three-way valve A is open to the side of the pipe 16b (A2 side), and the second three-way valve B is open to the supply pipe 16c side (B2 side). The third three-way valve C is opened to the side of the air conditioner 20 (the side of C3). As a result, the second heat medium (refrigerant) flowing out from the secondary side outlet 14c of the heat pump 14 reaches the air conditioner 20 through the supply pipe 16c as shown by the white arrow in FIG. 5, and reaches the cooler 20 with the black arrow. As shown by, the air flows into the secondary side 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 having a set temperature T 0} or less is stored and the primary side circuit of the heat pump 14, and the primary side circuit to the secondary side circuit of the heat pump 14 are circulated. A second heat medium (hydrogen) is circulated between the secondary circuit of the heat pump 14 and the air conditioner 20 to be used for cooling the room. Since cold water with a set temperature of T ₀ or less is used, efficient cooling is possible.

When the free cooling mode is selected, it is as follows. FIG. 6 is a piping diagram showing the flow of the chilled water medium in the free cooling mode. The temperature sensor 12f detects the water temperature T of the snowmelt tank 12, and when the water temperature T is equal to or higher than the _{predetermined set temperature T 0 (T ≧ T 0} ), the groundwater pump 22b operates to pump the groundwater through the pumping pipe 22c. Then, the groundwater is supplied to the snowmelt tank 12 through the groundwater supply pipe 12d. As a result, the water temperature T of the snowmelt tank 12 drops. When the water temperature T of the snow melting tank 12 reaches the set temperature T _0, operation stops groundwater pumping pump 22b, it stops the supply of ground water to snow melting tank 12.

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). The third three-way valve C is opened to the side of the air conditioner 20 (the side of C3). As a result, the chilled water medium from the heat collecting coil 12c of the snow melting tank 12 reaches the air conditioner 20 from the pipe 16b through the branch pipe 16e and then through the supply pipe 16c, as shown by the white arrow in FIG. As shown by the arrow, it flows into the secondary side inflow port 14d through the return pipe 16d, flows from the secondary side circuit to the secondary side outflow port 14c, and then passes through the branch pipe 16f and the pipe 16a to collect the snow melting tank 12. It reaches the thermal coil 12c.

In the free cooling mode, the refrigerant is directly circulated between the snowmelt tank 12 and the air conditioner 20 in which water having _{a set temperature T 0 or less is stored, and is used for cooling the room.} Since cold water with a set temperature of T ₀ or less is directly used, the temperature of the cold water is higher than that in the cooling mode, but the heat pump does not operate, so that more energy-saving cooling is possible.

When the snowmelt mode is selected, the groundwater pump 22b operates, pumps groundwater through the pumping pipe 22c, and supplies groundwater to the snowmelt tank 12 through the groundwater supply pipe 12d. As a result, the water temperature T of the snowmelt tank 12 rises. 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 of the snowmelt tank 12 is kept constant, so that the snow thrown into the snowmelt tank 12 can be easily melted.

The snowmelt mode may be selected alone or in combination with the heating mode.

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 above invention, and various modifications can be made within the scope of the invention described in the claims, and these are also included in the scope of the present invention. It goes without saying that it is a thing.

10 Air conditioning supply system 12 Snow melting tank 12a Main body 12b Lid 12c Heat collection coil 12d Groundwater supply pipe 12e Drain pipe 12f Temperature sensor 14 Heat pump 14a Primary side outlet 14b Primary side outlet 14c Secondary side outlet 14d Secondary side flow Inlet 16 Piping box 16a Piping 16b Piping 16c Piping (supply pipe)
16d piping (return pipe)
16e Branch pipe 16f Branch pipe 18 Heater 20 Cooler 22 Groundwater pumping device 22a Main body 22b Groundwater pumping pump 22c Pumping pipe 24 Sewage tank A 1st three-way valve A1 Input port A2 Output port A3 Branch port B 2nd 3-way valve Port B2 Output port B3 Branch port C 3rd three-way valve C1 Input port C2 Heater output port C3 Cooler output port

Claims (2)

A heating / 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 heater and a cooling machine installed indoors, respectively, and can select a heating mode, a cooling mode, or a free cooling mode. It ’s a system,
The primary side piping system that connects the snow melting tank and the primary side circuit of the heat pump in a circulating state, and the secondary side that connects the secondary side circuit of the heat pump and the heater or the cooling machine in a circulating state. Further equipped with a piping system,
In the heating mode, when the water temperature of the snowmelt tank is equal to or lower than a predetermined set temperature, the groundwater pumping device is operated to supply groundwater to the snowmelt tank, and the water temperature of the snowmelt tank is raised to raise the water temperature. To the above set temperature or higher,
In the cooling mode or the free cooling mode, when the water temperature of the snowmelt tank is equal to or higher than a predetermined set temperature, the groundwater pumping device is operated to supply groundwater to the snowmelt tank, and the water temperature of the snowmelt tank is supplied. To bring the water temperature to the set temperature or lower,
In the heating mode, heat transfer is generated from the primary side circuit to the secondary side circuit to supply heat medium to the heater through the secondary side piping system.
In the cooling mode, the refrigerant is supplied to the air conditioner through the secondary piping system by causing heat transfer from the primary circuit to the secondary circuit.
In the free cooling mode, a cooling / heating supply system is configured such that a refrigerant is directly circulated between the snowmelt tank and the air conditioner. With more snowmelt mode
According to claim 1, the snowmelt mode is configured to operate the groundwater pumping device to supply groundwater to the snowmelt tank and raise the water temperature of the snowmelt tank. Air conditioning supply system.

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