JP2016017721A - Outdoor machine system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an outdoor machine system improving energy consumption efficiency.SOLUTION: An outdoor machine system includes a gas temperature adjustment device that adjusts temperature of ambient air before introduced into an outdoor machine of an air conditioning device. The gas temperature adjustment device includes a first heat exchanger performing heat exchange between ambient air before introduced into the outdoor machine and an intermediate heat medium, and a second heat exchanger performing heat exchange between the intermediate heat medium and a heat source derived from renewable energy. Gas subjected to temperature adjustment with the gas temperature adjustment device is introduced into the outdoor machine to perform heat exchange between the gas and the heat medium of the air conditioning device.SELECTED DRAWING: Figure 2

Description

  The present invention relates to an outdoor unit system including an outdoor unit of an air conditioner.

  Generally, in an air conditioner, a heat medium is circulated between an indoor unit and an outdoor unit, and heat is exchanged between the indoor air and the heat medium in the indoor unit, and between the outdoor air and the heat medium in the outdoor unit. (See, for example, Patent Document 1).

Japanese Patent Laid-Open No. 60-147078

  The objective of this invention is providing the outdoor unit system which improves energy consumption efficiency.

As a means for solving the above problems, the invention described in claim 1 includes a gas temperature adjusting device that adjusts the temperature of the outside air before being introduced into the outdoor unit of the air conditioner, and the gas temperature adjusting device is provided in the outdoor unit. A first heat exchanger that exchanges heat between the outside air before introduction and the intermediate heat medium, and a second heat exchanger that exchanges heat between the intermediate heat medium and a heat source derived from renewable energy. It is characterized by providing.
According to this configuration, the gas whose temperature is adjusted by the gas temperature adjusting device is introduced into the outdoor unit and exchanges heat with the heat medium of the air conditioner, so that the energy consumption efficiency of the air conditioner can be enhanced. Since the gas temperature adjusting device exchanges heat between the intermediate heat medium and the heat source derived from renewable energy such as geothermal heat in the second heat exchanger, the gas temperature adjusting device is operated without using a system such as a heat pump. be able to.

The invention described in claim 2 is characterized in that the second heat exchanger performs heat exchange between the intermediate heat medium and groundwater.
According to this configuration, it is possible to efficiently cool or warm the intermediate heat medium using the heat of groundwater that is stable at about 15 degrees throughout the year.

According to a third aspect of the present invention, the intermediate heat medium is pure water, and the gas temperature adjusting device is configured to circulate between the first heat exchanger and the second heat exchanger. It is characterized by comprising a heat medium spraying device for spraying a part to the heat exchange part of the outdoor unit.
According to this configuration, the intermediate heat medium adjusted to a temperature corresponding to geothermal heat can be sprayed on the heat exchange unit of the outdoor unit, and the heat exchange unit of the outdoor unit can be directly adjusted to a temperature corresponding to geothermal heat.

The invention described in claim 4 is characterized in that the gas temperature adjusting device includes a heat medium recovery device that recovers the intermediate heat medium sprayed by the heat medium spray device and returns it to the circulation path.
According to this configuration, the intermediate heat medium is purified to such an extent that scaling does not occur. However, it is possible to reduce the cost by suppressing the consumption due to the dispersion of the intermediate heat medium.

  ADVANTAGE OF THE INVENTION According to this invention, the outdoor unit system which improves energy consumption efficiency can be provided.

It is a block diagram of the air conditioning apparatus containing the outdoor unit system in embodiment of this invention. It is explanatory drawing of the outdoor unit system in this embodiment. It is explanatory drawing of the outdoor unit periphery of the said outdoor unit system.

Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is a configuration diagram of an air conditioner 1 including an outdoor unit system 10 according to an embodiment of the present invention. The air conditioner 1 is a known heat pump type air conditioner. The air conditioner 1 includes an indoor unit 2 installed in a room to be air-conditioned, an outdoor unit 3, a compressor 5 and an expansion valve provided in a circulation path 4 for circulating a heat medium between the indoor unit 2 and the outdoor unit 3. 6.

  FIG. 2 is an explanatory diagram of the outdoor unit system 10, and FIG. 3 is an explanatory diagram around the outdoor unit 3 of the outdoor unit system 10. The outdoor unit 3 performs heat exchange between the heat medium that has absorbed or radiated heat in the indoor unit 2 and the outside air. A first heat exchanger of the gas temperature adjusting device 11 that can adjust the temperature of the outside air by using renewable energy is provided in the outside air introduction port 3a that takes in outside air that exchanges heat with the heat medium in the outdoor unit 3. 12 is provided.

  The gas temperature adjusting device 11 is not particularly limited as long as the temperature of the gas (outside air) that exchanges heat with the heat medium in the outdoor unit 3 can be adjusted, but in the present embodiment, a system using groundwater heat is configured. The temperature of groundwater is stable at around 15 ° C throughout the year. When the outside air temperature is high (about 30 ° C), the outside air introduced into the outdoor unit 3 is cooled, and when the outside air temperature is low (about 0 ° C) The outside air introduced into the outdoor unit 3 is warmed. By adjusting the temperature of the outside air introduced into the outdoor unit 3 to around 15 degrees, it is possible to increase the average energy consumption efficiency (COP) of air conditioning.

  The gas temperature adjusting device 11 may use surface water such as river water as long as the temperature is stable throughout the year like groundwater. Moreover, the system which can utilize underground geothermal directly or can adjust temperature with the power supply derived from renewable energy, such as sunlight, a wind force, wave power, tidal power, flowing water, biomass, may be sufficient. In other words, any system using a heat source derived from various renewable energies may be used.

  The outdoor unit 3 is provided with an outside air introduction port 3a for introducing outside air and an exhaust port 3b for discharging the introduced outside air. The first heat exchanger 12 of the gas temperature adjusting device 11 is installed in the outside air inlet 3a. The outside air that has passed through the outside air flow path 12c of the first heat exchanger 12 is supplied to the heat exchanging section 3c in the outside air inlet 3a in a state in which the temperature is adjusted to a temperature equivalent to groundwater heat. An intake / exhaust fan 3d is provided in the exhaust port 3b.

  The gas temperature adjusting device 11 supplies groundwater heat to the first heat exchanger 12 through an intermediate heat medium. The gas temperature adjusting device 11 includes a first heat exchanger 12, a second heat exchanger 13 that adjusts the temperature of the intermediate heat medium that has absorbed or dissipated heat in the first heat exchanger 12 using groundwater heat, and a second heat exchanger. A groundwater introduction path 14 connected to 13 groundwater introduction sections 13 a, a groundwater discharge path 15 connected to a groundwater discharge section 13 b of the second heat exchanger 13, and a heat medium outlet section 13 c of the second heat exchanger 13. A first heat medium flow path 16 across the heat medium introduction part 12a of the first heat exchanger 12, a heat medium lead-out part 12b of the first heat exchanger 12, and a heat medium introduction part 13d of the second heat exchanger 13. Of the first heat medium flow path 17, the heat medium circulation device 18 provided across both intermediate portions of the first heat medium flow path 16 and the second heat medium flow path 17, and the first heat medium flow path 16. A part of the intermediate heat medium provided on the downstream side (the first heat medium flow channel 16 side) of the heat medium circulation device 18 is outside air of the outdoor unit 3. A heat medium spraying device 19 that sprays toward the inlet 3a, and a heat medium recovery device 20 that receives the intermediate heat medium that has flowed down the outdoor unit 3 after being sprayed by the heat medium spraying device 19 and recirculates it to the heat medium circulation device 18. And comprising.

  The first heat exchanger 12 is, for example, a fin tube heat exchanger, and can efficiently transfer heat to the outside air with a small installation space. Thereby, an increase in the installation space of the outdoor unit 3 including the first heat exchanger 12 is suppressed, and this is also facilitated when the first heat exchanger 12 is additionally installed in the existing outdoor unit 3. The first heat exchanger 12 is not limited to the fin tube type, and various heat exchangers such as a gas-liquid contact type can be employed.

  The second heat exchanger 13 is, for example, a plate heat exchanger, is compact, has high heat transfer performance, and is excellent in maintainability. Thereby, the installation of the gas temperature adjusting device 11 becomes easier and the maintenance accompanying the circulation of the groundwater becomes easier. The second heat exchanger 13 is not limited to the plate type, and various heat exchangers such as a spiral type can be adopted.

  The groundwater introduction path 14 connected to the second heat exchanger 13 is provided with a catalyst filter unit 14a for preventing scale. Although a pump for pumping up groundwater is not shown, if this pump is located downstream of the catalyst filter unit 14a of the groundwater introduction passage 14 (on the second heat exchanger 13 side) or the groundwater discharge passage 15, the catalyst filter is also used in the pump. The scale prevention effect by the unit 14a can be obtained. The groundwater discharge path 15 may simply discharge the groundwater absorbed or radiated by the second heat exchanger 13 to a sewer or the like, or may be configured to supply to a waste heat utilization device (not shown).

  The heat medium circulating device 18 has a drive source such as a pump, and pumps the intermediate heat medium, and circulates the intermediate heat medium between the first heat exchanger 12 and the second heat exchanger 13. In the heat medium circulation device 18, a heat medium replenishment section 18 a that connects a replenishment path 21 that enables replenishment of the intermediate heat medium that has become insufficient due to volatilization due to the dispersion of the intermediate heat medium, and a heat medium recovery path of the heat medium recovery apparatus 20. And a heat medium recovery unit 18b for connecting 20b.

  The heat medium spraying device 19 has a spray nozzle 19 a that branches off from the first heat medium flow path 16. The spray nozzle 19a sprays the intermediate heat medium pumped from the heat medium circulating device 18 toward the outside air inlet 3a of the outdoor unit 3 in the form of drops or mist. Thereby, it is possible to directly cool or heat the heat exchange part 3c in the outside air inlet 3a.

  The heat medium recovery device 20 includes a recovery tray 20a that is provided below the heat exchanger and receives an intermediate heat medium that has flowed down the heat exchanger, a recovery tray 20a, and a heat medium recovery unit 18b of the heat medium circulation device 18. And a heat medium recovery path 20b for connecting the two. The intermediate heat medium received by the recovery tray 20a passes through a filter (not shown), and then joins the first heat medium flow path 16 in the heat medium circulation device 18 to supply to the first heat exchanger 12 and the outdoor unit 3 Reused for spraying.

  Demineralized water (pure water, ion-exchanged water) is used for the intermediate heat medium, which suppresses the generation of scale in the circulation path of the intermediate heat medium, the spray device, and the spray partner, and when using alternative chlorofluorocarbons, etc. Compared with the environment is not affected. The intermediate heat medium may be water purified to the extent of rainwater, and in addition to artificially generated desalted water, stored rainwater can be filtered and used. The intermediate heat medium can be supplied to the circulation path in the heat medium circulation device 18 via the supply path 21. Moreover, the cost for producing | generating the pure water etc. as an intermediate | middle heat medium by using the heat medium collection | recovery apparatus 20 is suppressed.

Next, the operation of the outdoor unit system 10 will be described.
In general, when the air conditioner 1 is in the cooling operation, if the temperature of the outside air that exchanges heat in the outdoor unit 3 is high, the average energy consumption efficiency of the air conditioning becomes low. On the other hand, when the air conditioner 1 is in the heating operation, if the temperature of the outside air that exchanges heat in the outdoor unit 3 is low, the air conditioning average energy consumption efficiency is low.

  On the other hand, in the outdoor unit system 10, the outdoor air introduced into the outdoor unit 3 and exchanging heat with the heat medium is appropriately cooled or heated by the gas temperature adjusting device 11 immediately before being introduced into the outdoor unit 3. The outside air used for heat exchange in 3 is not introduced into the outdoor unit 3 as a gas whose temperature is controlled by using geothermal heat, instead of the outside air temperature.

  The outdoor air that passes through the first heat exchanger 12 and is introduced into the outdoor unit 3 undergoes heat exchange with the intermediate heat medium in the heat exchange unit 3c. The temperature of the intermediate heat medium is controlled in the second heat exchanger 13 so as to be approximately the groundwater temperature. For example, when the temperature of the intermediate heat medium is 15 degrees equivalent to the groundwater temperature and the outside air temperature is higher than 15 degrees, the outside air that has passed through the first heat exchanger 12 is cooled to a temperature equivalent to the groundwater. The Conversely, when the outside air temperature is a temperature lower than 15 degrees, the outside air temperature is heated to a temperature higher than 15 degrees.

  Further, in the outdoor unit system 10, when the outside air temperature is higher than 15 degrees by spraying the intermediate heat medium onto the outside air inlet 3 a of the outdoor unit 3 by the heat medium spraying device 19, As a result, the heat exchanging part 3c in the outside air inlet 3a is directly cooled, and the heat exchanging part 3c is also cooled by the vaporization heat of a part of the intermediate heat medium. On the other hand, when the outside air temperature is lower than 15 degrees, even if about 5 degrees is subtracted as the heat of vaporization of the intermediate heat medium, the heat exchanger 3c in the outside air inlet 3a is directly heated by the heat of the intermediate heat medium. Is done.

In this way, the outside air whose temperature is adjusted is taken into the outdoor unit 3 and the heat exchange unit 3c of the outdoor unit 3 is directly cooled or heated by the intermediate heat medium, thereby improving the average energy consumption efficiency of the air conditioner 1. High energy saving effect can be obtained.
Further, it is possible to avoid the waste heat from the outdoor unit 3 from becoming excessively high or low, and to prevent heat island measures in summer and defrost operation in winter.
Furthermore, by performing heat exchange between the intermediate heat medium and the groundwater, the intermediate heat medium can be efficiently cooled or heated using groundwater that is stable at about 15 degrees throughout the year.

  In addition, by using pure water as the intermediate heat medium, it is possible to suppress the occurrence of scale in the circulation path of the intermediate heat medium, the spray device, and the spray partner, and to make the environment low impact. Replenishment of the intermediate heat medium is relatively easy, but by further including the heat medium recovery device 20 that recovers the dispersed intermediate heat medium, the replenishment cost of the intermediate heat medium can be suppressed.

  The configuration in the above embodiment is an example of the present invention, and various modifications can be made without departing from the gist of the present invention, such as replacing the component of the embodiment with a known component.

DESCRIPTION OF SYMBOLS 1 Air conditioner 2 Indoor unit 3 Outdoor unit 3c Heat exchange part 10 Outdoor unit system 11 Gas temperature adjustment device 12 1st heat exchanger 13 2nd heat exchanger 19 Heat-medium spraying device 20 Heat-medium recovery device

Claims (4)

It has a gas temperature adjustment device that adjusts the temperature of the outside air before it is introduced into the outdoor unit of the air conditioner
The gas temperature adjusting device includes a first heat exchanger that exchanges heat between the outside air before being introduced into the outdoor unit and the intermediate heat medium, and a heat source derived from the intermediate heat medium and renewable energy. An outdoor unit system comprising: a second heat exchanger that performs heat exchange.   The outdoor unit system according to claim 1, wherein the second heat exchanger performs heat exchange between the intermediate heat medium and groundwater. The intermediate heat medium is pure water;
The gas temperature adjusting device includes a heat medium spraying device for spraying a part of the intermediate heat medium circulating between the first heat exchanger and the second heat exchanger to a heat exchange part of the outdoor unit. The outdoor unit system according to claim 1 or 2, characterized in that.   4. The outdoor unit system according to claim 3, wherein the gas temperature adjusting device includes a heat medium recovery device that recovers the intermediate heat medium sprayed by the heat medium spray device and returns the intermediate heat medium to a circulation path.

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