JPH0416124Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a heat pump for heating, cooling, and dehumidifying that utilizes groundwater and incorporates a dehumidification system in addition to an air conditioning system.

The inventor of the present invention had previously proposed a heat pump for air conditioning and heating that uses groundwater (Patent application No. 57-138177).
(No. 145693), the present invention is characterized by integrally incorporating a dehumidification system therein.

That is, the present invention includes a compressor that performs the refrigerant compression process, a four-way valve that switches the flow direction of the refrigerant during heating, dehumidification, and cooling, and a blower that acts as a refrigerant condenser during heating and dehumidification. The first heat exchanger releases the condensation heat and acts as a refrigerant evaporator during cooling to absorb heat from the air and evaporate the refrigerant, and the first heat exchanger acts as a refrigerant evaporator during heating and dehumidification to heat underground water. and a second heat exchanger that absorbs the refrigerant and evaporates the refrigerant and acts as a condenser for the refrigerant during cooling and radiates the heat of condensation to the groundwater, and the groundwater after passing through the second heat exchanger during dehumidification The present invention relates to a heating/cooling/dehumidifying heat pump characterized in that a dehumidifying system passing through a dehumidifying coil in a first heat exchanger is branched into the system through a three-way valve.

The heat pump of this invention combines heat pumps for heating, cooling, and dehumidifying into an integrated unit.
This can be installed inside a vinyl greenhouse for agricultural chemicals, a greenhouse, etc., and the intended purpose can be achieved with a simple configuration and easy handling.

Examples of the present invention are shown below.

Embodiment [Heating operation] The refrigerant circulation path is shown by arrow A in FIG. 1, and the flow of underground water is shown by arrow A'.

First, the refrigerant is compressed by a compressor 1 to generate heat of compression, and a four-way valve 2, which is a switching valve in the refrigerant circuit, allows the flow direction of the refrigerant to be changed between cooling and heating. Next, the refrigerant enters the first heat exchanger 3, which becomes a refrigerant condenser during heating, and the heat of condensation is radiated in the direction of arrow D by the blower 6 to heat the room. Next, the refrigerant undergoes rapid expansion in the capillary reach tube 4 or the expansion valve due to the pressure difference, and is sent to the second heat exchanger 5. The heat exchanger 5 functions as a refrigerant evaporator during heating (it functions as a cooler for the groundwater with which heat is exchanged), and absorbs the heat of the groundwater to evaporate the refrigerant. Thereafter, the refrigerant returns to the compressor 1 through the four-way valve 2. On the other hand, groundwater pumped up from underground through the pumping pipe 8 by the pumping pump 7 is cooled by the heat exchanger 5 as described above, passes through the three-way valve 9, and reaches the return pipe 10 as shown by arrow A'.
From now on, it will be returned to the ground.

[] Cooling operation The refrigerant circulation path is shown by arrow B, and the flow of underground water is shown by arrow B'.

After the refrigerant is compressed by a compressor 1, it is sent in the direction of arrow B by a four-way valve 2. Second heat exchanger 5
serves as a refrigerant condenser, where heat is released to the groundwater flowing in the direction of arrow B' and the refrigerant is cooled. Next, the refrigerant is rapidly expanded by the capillary reach tube 4 or the expansion valve and sent to the first heat exchanger 3. The heat exchanger 3 acts as a refrigerant evaporator during cooling, absorbing heat from the air and evaporating it.

In this way, the process of the heat exchanger 3 takes heat from the indoor air, resulting in cooling operation, and at the same time, since condensed water is removed, it also exhibits a dehumidifying effect. The flow of groundwater will be the same as during heating operation.

[] Dehumidification operation The refrigerant flow is in the same direction as in the heating operation, and the flow of underground water is switched at the three-way valve 9 and passed through the dehumidification coil 11 provided in the first heat exchanger 3 before flowing into the return pipe 10. . The flow of groundwater at this time is shown by arrow C'. At this time, the air heated by the first heat exchanger 3, which acts as a condenser, absorbs heat by the second heat exchanger 5, which acts as an evaporator, and then passes through the dehumidifying coil 11 to the groundwater [5°C to 10°C]. ], the moisture in the air condenses due to the temperature difference and is discharged as water, resulting in the desired dehumidification.

That is, since the refrigerant is flowing in the A direction, high temperature air is generated by the first heat exchanger 3 and heating is performed.

At this time, the low-temperature groundwater flows into the dehumidifying coil 11.
Since water is being passed through the dehumidifying coil 11, the high-temperature air first passes through the dehumidifying coil 11 while being partially in contact with the dehumidifying coil 11 before being sent into the room, and heat is taken away by the low-temperature water in the coil 11. Other parts are only slightly affected by the low-temperature water, so overall the temperature drop in the air is not large.

At the same time as the temperature of the high-temperature air is slightly lowered, the dehumidifying coil 11 of the high-temperature air is
From the part of the air that comes into contact with the coil 11, water vapor exceeding the saturated water vapor at the lowered temperature condenses on the coil 11, so that the air is dehumidified.

Therefore, even if the temperature of the high-temperature air generated in the first heat exchanger 3 is not significantly lowered, it is possible to dehumidify the air.

As described above, the present invention has the effect that dehumidification can be carried out during heating operation without significantly lowering the heating temperature.

In FIG. 2, 12 is an indoor coil, 13 is a room thermometer, 14 is an operation panel, 15 is a control panel, 16 is a cooler, 17 is a blower duct fitting, 18 is a blower duct fan, and 19 is a duct.

[Brief explanation of the drawing]

FIG. 1 is a system diagram showing the refrigerant stroke and underground water flow of the heat pump of the present invention, and FIG. 2 is an explanatory diagram of the assembly of the heat pump of the present invention. 1... Compressor, 2... Four-way valve (switching valve), 3... First heat exchanger, 5... Second heat exchanger, 6... Air blower, 7... Water pump, 8...
Lifting pipe, 9... Three-way valve, 10... Return pipe, 11...
...dehumidification coil.

Claims (1)

[Scope of utility model registration request] A compressor 1 performs a refrigerant compression process, a switching valve 2 switches the flow direction of the refrigerant during heating, dehumidification, and cooling, and functions as a refrigerant condenser during heating and dehumidification to condense the refrigerant using a blower. A first heat exchanger 3 emits heat and acts as a refrigerant evaporator during cooling, absorbing heat from the air and evaporating the refrigerant, and acts as a refrigerant evaporator during heating and dehumidification to evaporate heat from underground water. A second heat exchanger 5 absorbs the refrigerant and evaporates it and becomes a refrigerant condenser during cooling and radiates the heat of condensation to groundwater. A heat pump for heating, cooling, and dehumidifying purposes, characterized in that a dehumidifying system that passes through a dehumidifying coil in a first heat exchanger 3 is branched into a groundwater system via a three-way valve.