JP2009236329A - Non-defrost heat pump device for protected horticulture using ground heat-groundwater - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve a problem that rising of crude oil costs caused by oil prices soaring of overall society, puts pressure on profit, though a fan forced heater, a heavy oil heater, a warm water heater and the like are used in protected horticulture cultivation in a green house, and these apparatuses use crude oil as power sources. <P>SOLUTION: This non-defrost heat pump device for protected horticulture cultivation includes an indoor unit disposed inside of the green house for protected horticulture cultivation, a refrigerant pipe connected with the indoor unit to allow a refrigerant to flow in and out, a non-defrost heat pump outdoor unit of which a refrigerant pipe is connected to the indoor unit, a heat exchanger connected with the non-defrost heat pump outdoor unit for absorbing water cold heat source (latent heat) of ground heat or groundwater, and a blower disposed neat the heat exchanger. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention requires the generation of a constant temperature environment / humidity environment in greenhouses, seedling equipment, plant factories, etc. (hereinafter referred to as greenhouses) in horticultural cultivation of crops and / or plants such as flowers, vegetables and fruits. (Required). In greenhouse horticultural cultivation using this greenhouse, the present invention relates to a non-defrost heat pump device that uses geothermal heat and / or groundwater in order to generate the intended temperature environment and humidity environment.

  Conventionally, as a method of greenhouse horticulture using a greenhouse, a warm air heater, a heavy oil heater, a hot water heater, or the like is used to heat the greenhouse. And, since heating using these devices is all powered by crude oil, society has been squeezing profits due to soaring crude oil market prices as a result of high crude oil costs. As mentioned above, the facility horticulture industry, which is representative of greenhouse horticulture used in greenhouses that represent flowers, vegetables, fruits, etc., also has the largest alternative energy due to soaring fuel oil and kerosene as fuel for heating heaters in greenhouses. It is not an exaggeration to say that it will affect the continuity of business.

  Under these circumstances, electric farm heat pumps that are 50% to 60% clean energy and low in running cost and low in carbon dioxide emissions are in the limelight, and are already in many areas. Has been used for a long time.

  However, the electric air heat source heat pump operates in a defrosting cycle in order to maintain the heating capacity during the heating operation, and therefore requires about 30% heating capacity. As a result, the heating capacity of about 30% is insufficient, and once a hour, in order to remove the frost attached to the heat exchanger provided in the outdoor unit, the defrosting operation is performed. In the horticultural horticulture used in the greenhouse, there has been a problem that temperature adjustment and the like cannot be performed efficiently.

Therefore, the present invention is a non-defrost heat pump that enables continuous heating operation by circulating geothermal and groundwater in the heat exchanger so as not to reach the defrosting operation cycle temperature range, which is a drawback of the heat pump for the air heat source. The device is adopted.

  Then, since the prior art literature was investigated regarding this invention, it illustrates below.

  Document (1) is Japanese Patent Application Laid-Open No. 2004-360957 “Air Conditioner”. The outline includes a humidifying passage for supplying humidified air into the room through the humidifying rotor, and a heater disposed on the upstream side of the humidifying rotor in the humidifying passage, and a damper disposed on the leeward side of the humidifying rotor, By switching from the humidification passage to the defrosting passage and supplying the heated air of the heater to the outdoor heat exchanger through the defrosting passage, it is intended to shorten the defrosting time and shorten the heating operation time. .

  Reference (2) is “a heat source equipment manufacturing method and a heat source unit” of Japanese Patent Laid-Open No. 2003-161546. The outline is that the heat source equipment is connected to the heat source unit embedded in the heat source pipe embedded in the heat source unit to conduct the heat medium to the heat source exchanger or the output side exchanger of the heat pump. A state in which the existing foundation in which a hole or notch-shaped tube intubation part is inserted into a state protruding from the planned installation location and facing the foundation is inserted into the pipe end of the external heat transfer medium pipe In the structure where the heat source unit is installed in the place where the foundation is planned to be installed, and the pipe end of the external heat medium pipe that is inserted through the pipe insertion part is connected to the heat source unit, the heat pump is built in the case. By adopting a reasonable mode of implementation for the heat source equipment that uses the heat source unit, the construction of the equipment is intended to be performed easily and efficiently.

  Finally, Document (3) is “Hot Water Utilization System” of Japanese Patent No. 3972839. The outline is that a hot water storage tank into which tap water or well water flows flows out low temperature water from the bottom of this hot water tank, connects it to a hot water tank heated by a heat source such as this heat pump, and connects it to a heating circulation path that returns it. A branch path branched from the middle of the hot water supply path connecting the hot water supply path having the hot water supply port at the top of the hot water storage tank is connected to the lower part of the hot water storage tank via the primary side of the hot water storage tank, thereby circulating the primary side. Forming a secondary circuit, connecting the secondary side of the heat exchanger to the input side and the output side of the thermal load terminal to form a secondary circuit, and on the forward side of the secondary circuit, the thermal load terminal This is a structure that mixes at least a part of the condensate from the high temperature water flowing out from the secondary side of the heat exchanger, and in order to load terminals (high load terminals, low load terminals) in different temperature ranges in order Heat can be used efficiently It intended to theft.

JP 2004-360957 A JP 2003-161546 A Patent Registration No. 3972839

  The document (1) is intended to switch the humidifying passage to the defrosting passage with a damper and supply the heater heated air from the defrosting passage, but it is not a structure that can completely eliminate the defrosting. In addition, there is a need to intermittently perform the defrosting operation, and in particular, there are problems such as frequent defrosting operation and a decrease in heating capability during severe cold in winter.

  Moreover, although literature (2) is adopting the rational implementation form to the heat source equipment which uses a heat source unit regarding this structure and intends that the equipment of a stable heat source can be supplied, the said literature (1) ), It is necessary to intermittently perform the defrosting operation, and it is considered that the same problem as in the above-mentioned document (1) occurs.

  Finally, as reference (3), low temperature water is taken out from the lower part of the hot water storage tank into the hot water storage tank into which tap water or well water flows. Since at least a part of the condensate from the terminal and the high temperature water flowing out from the secondary side of the heat exchanger are used in a mixed state, heat loss is considered to occur.

  In addition to such problems, the above references (1) to (3) are limited to the fields of homes and factories, and in the field of greenhouse horticultural cultivation such as greenhouses as in the present invention. It is considered that the literatures (1) to (3) are different from the present invention in this respect, not in the non-defrost heat pump device to be used.

Therefore, the present applicant has completed the invention that produces the following effects, and is listed below.
(A) Since the loss of about 30% due to the defrost cycle during the heating operation can be compensated, the original capacity of the heat pump can be exhibited in a complete state, and the heating operation can be performed continuously. In addition, the cultivation of crops, plants, and the like is performed with efficient air-conditioning operation according to the individual growth conditions (growth conditions) of the crops.
(B) In summer, by reducing the condensing temperature in the heat exchanger, power consumption (running cost) can be suppressed, and electricity costs can be saved. Furthermore, the facility gardening cultivation can be expanded by making it possible to carry out cooling operation at night in summer. Further, since the above-described nighttime cooling operation can be performed, it is possible to avoid using electricity locally in the daytime, and stable use (supply) of electricity for 24 hours can be achieved.
(C) The underground temperature is stable throughout the year, and even when compared to the outside air temperature, it is low in summer and high in winter. can do.
(D) Compared with petroleum fuel, the amount of carbon dioxide emission can be reduced by about 40 to 50%, and operation friendly to the global environment can be performed.

  The invention of claim 1 is intended to achieve the objects (a) to (d) and to provide an optimum heat exchanger for achieving the object.

  [Claim 1] An indoor unit provided inside a greenhouse for horticultural cultivating, a refrigerant pipe for inflow or outflow of refrigerant connected to the indoor unit, and a non-defrost heat pump outdoor unit connected to the indoor unit with a refrigerant pipe Horticultural cultivation characterized in that a heat exchanger and a blower are provided in the vicinity of the heat exchanger to absorb geothermal heat or groundwater water-cooled heat source (latent heat) connected to the non-defrost heat pump outdoor unit It is a non-defrost heat pump device for use.

  The invention of claim 2 is intended to achieve the object of claim 1 and to provide an optimum underground heat exchanger and geothermal piping for achieving this object.

Claim 2 is the non-defrost heat pump device for facility horticulture cultivation according to claim 1,
To the heat exchanger, a ground heat exchanger buried in the ground and a water-cooled heat source absorbed by the ground heat exchanger flow into the heat exchanger, or the exhaust heat from the heat exchanger is reduced to the ground It is a non-defrost heat pump device for horticultural horticultural cultivation characterized in that a geothermal piping is provided.

  The invention of claim 3 is intended to achieve the object of claim 1 and to provide an optimal well water pipe for achieving the object.

Claim 3 is a non-defrost heat pump device for horticultural cultivation according to claim 1,
The heat exchanger is submerged in a water tank (referred to as groundwater) such as ground water, well water, or a water tank, and is provided with a well water pipe for introducing a water-cooled heat source or returning the water-cooled heat source to ground water. It is a non-defrost heat pump device for facility horticulture.

  The invention of claim 1 is an indoor unit provided in a greenhouse for horticultural cultivation, a refrigerant pipe for inflow or outflow of a refrigerant connected to the indoor unit, and a non-defrost in which a refrigerant pipe is connected to the indoor unit. A heat pump outdoor unit, a heat exchanger for absorbing geothermal or groundwater water cooling heat source (latent heat) connected to this non-defrost heat pump outdoor unit, and a facility provided with a blower in the vicinity of this heat exchanger It is a non-defrost heat pump device for gardening cultivation.

Accordingly, claim 1 has the following characteristics.
(A) Since the loss of about 30% due to the defrost cycle during the heating operation can be compensated, the original capacity of the heat pump can be exhibited in a complete state, and the heating operation can be performed continuously. In addition, the cultivation of crops, plants, and the like is performed with efficient air-conditioning operation according to the individual growth conditions (growth conditions) of the crops.
(B) In summer, by reducing the condensing temperature in the heat exchanger, power consumption (running cost) can be suppressed, and electricity costs can be saved. Furthermore, the facility gardening cultivation can be expanded by making it possible to carry out cooling operation at night in summer. Further, since the above-described nighttime cooling operation can be performed, it is possible to avoid using electricity locally in the daytime, and stable use (supply) of electricity for 24 hours can be achieved.
(C) The underground temperature is stable throughout the year, and even when compared to the outside air temperature, it is low in summer and high in winter. can do.
(D) Compared with petroleum fuel, the amount of carbon dioxide emission can be reduced by about 40 to 50%, and operation friendly to the global environment can be performed.

  The invention of claim 2 is the non-defrost heat pump device for facility horticultural cultivation according to claim 1, wherein the heat exchanger includes a ground heat exchanger embedded in the ground, and water cooling absorbed by the ground heat exchanger. A non-defrost heat pump apparatus for horticultural horticultural cultivation characterized in that a heat source flows into the heat exchanger or a geothermal pipe for reducing exhaust heat from the heat exchanger to the ground.

  Accordingly, the second aspect has features such as achieving the object of the first aspect and providing an optimum underground heat exchanger and geothermal piping for achieving the object.

  The invention of claim 3 is a non-defrost heat pump device for facility horticulture as set forth in claim 1, wherein the heat exchanger is immersed in a water tank (ground water) such as ground water, well water, water storage tank, etc. It is a non-defrost heat pump device for horticultural horticulture, characterized in that it is provided with well water piping that flows in water or returns a water-cooled heat source to groundwater.

  Accordingly, the third aspect has features such as achieving the object of the first aspect and providing an optimum well water pipe for achieving the object.

  Referring to the drawings, FIG. 1 is a system diagram showing an overall outline of an example in which a ground heat exchanger of a non-defrost heat pump device is used, and FIG. 2 is another example of FIG. 1 and an example in which groundwater is used. Fig. 3-1 is a front view of the non-defrost heat pump indoor unit, Fig. 3-2 is a plan view of Fig. 3-1, and Fig. 3-3 is a side view of Fig. 3-1. Fig. 4-1 is an elevation view of a non-defrost heat pump outdoor unit, Fig. 4-2 is a side view of Fig. 4-1, Fig. 4-3 is a rear view of Fig. 4-1, and Fig. 5 is an underground heat exchanger. FIG. 6 is a front view, FIG. 6 is a schematic diagram showing a graph of temperature changes in the ground for one year, and FIG. 7 is a front view showing an example of a monitoring screen.

  An example based on the present invention will be described below.

  Reference numeral 1 denotes a non-defrost heat pump device installed in the vicinity of a greenhouse, a seedling device, a plant factory, etc. (hereinafter referred to as greenhouse A) that performs plant and horticultural cultivation of plants such as flowers, vegetables, fruits, and the like. Directly or indirectly to the crops in the greenhouse A (by performing comprehensive or individual ventilation), heating or cooling (with hot air or cold air blowing) provided inside the greenhouse A The indoor unit 2 is connected by a refrigerant pipe 3, the amount of hot or cold refrigerant (circulation flow rate) is determined, and a stable temperature environment / humidity environment is provided for crops and / or plants grown in the horticulture. Produce and provide good quality crops.

  The indoor unit 2 is connected to one end of the refrigerant pipe 3, and the non-defrost heat pump outdoor unit 4 provided outside the greenhouse A is connected to the other end. The non-defrost heat pump outdoor unit 4 is provided with a heat exchanger 10 for absorbing geothermal heat or groundwater water cooling heat source (latent heat). A blower 15 is provided in the vicinity of the heat exchanger 10.

  Therefore, an example of geothermal use for absorbing or exhausting geothermal heat in the ground will be described.

  First, the retained enthalpy of the ground and groundwater (groundwater will be described in detail later) is used as a heat source, and as a waste heat absorption source, it is used as a water-cooled heat source (absorbs heat) via the non-defrost heat pump outdoor unit 4. As shown in FIG. 6, this geothermal heat is low-temperature thermal energy with a temperature of several tens of degrees C. or less that exists in the ground shallower than about 10 m below the ground. It is constant. Moreover, since the installation location of the non-defrost heat pump device 1 is farmland, a sufficient space for embedding the underground heat exchanger 6 that absorbs heat from the water-cooled heat source can be secured. In addition, when the geothermal heat exchanger 6 is buried, if the ground contains a large amount of moisture, the latent heat (the amount of heat containing moisture) is large, so that the heat can be effectively used. .

  Specifically, the heat exchanger 10 is connected to the underground heat exchanger 6 through the geothermal pipe 50. The geothermal pipe 50 uses two geothermal pipes 50, one end of which is connected to the underground heat exchanger 6 and the other end is connected to the heat exchanger 10. This geothermal pipe 50 uses one of the two pipes for heat absorption, and the other pipe for exhaust heat. The water cooling heat source flows in or out on average, and the two pipes A structure that circulates a water-cooled heat source through piping is used to prevent heat loss and leakage. Since the geothermal piping 50 has a high possibility of water leakage due to its structure, it is desirable to reduce the number of joints, and a thick shape with good thermal conductivity is preferable. In addition, it is durable and anticorrosive and needs to be flexible because it needs to be bent at the time of enforcement. For example, as a material for satisfying all of these requirements, resin, stainless steel, high-density polyethylene having a tube diameter of 13 to 50 A, and the like can be given.

  Next, the underground heat exchanger 6 is a long tube, and is laminated in a bellows state so as to be folded back (bundled) in the horizontal direction. Of course, this length takes into consideration the cost and time when the borehole is implemented (assembled).

  Next, the non-defrost heat pump outdoor unit 4 will be described. The non-defrost heat pump outdoor unit 4 is circulated by a circulation pump 8 that adjusts the amount of heat absorbed by the latent heat (heat source) from the geothermal pipe 50, power means 8a that operates the circulation pump 8, and power means 8a. A heat exchanger 10 through which the water-cooled heat source flows by a pump 8 is installed. The heat exchanger 10 is attached to the air-cooled heat exchanger 11, and the ratio of the air-cooled heat exchanger 11 is large so that the storage capacity of the water-cooled heat source is, for example, 7: 3. Provide to be. This ratio can be changed by enlarging or reducing the air-cooled heat exchanger 11 and the heat exchanger 10, but the heat exchanger 10 is a water-cooled heat source (latent heat) of geothermal / ground water (details will be described later). It is sufficient that a capacity capable of compensating for a loss of about 30% due to the defrost cycle during the heating operation can be secured so as not to reach the temperature range of the defrost operation cycle by circulating and using.

  Note that the compressor 30 is connected from the air-cooled heat exchanger 11 of the heat exchanger 10 through the refrigerant pipe 3. Then, the compressor 30 is connected to the indoor unit 2 through the refrigerant pipe 3. In addition, since this refrigerant | coolant piping 3 allows the refrigerant | coolant produced | generated with the said compressor 30 to pass through, the refrigerant | coolant piping 3 has the on-off valve 3a, and collates with climatic conditions, such as ambient temperature and humidity. Control the amount of refrigerant.

  The control is performed by the controller 14. For example, the controller 14 is provided inside the greenhouse A, and measures the temperature and humidity in the greenhouse A, so that it is a non-defrost heat pump according to the growth environment (growth conditions) of the grown crops, plants, etc. Hot air or cold air is blown from the indoor unit 2 as appropriate. The controller 14 detects the temperature in the ground. For example, when the ground temperature is lower than the outside air temperature during the heating operation, except during winter and summer, and during the cooling operation. When the underground temperature is higher than the outside air temperature, it is possible to select not to use the water cooling heat source by the control of the controller 14, and efficient cooling and heating can be performed for the crops in the greenhouse A. For example, in the winter season, when the water temperature of the water storage tank 31 decreases due to snowfall, snowstorm, etc., the use and recovery of the water cooling heat source (latent heat) cannot be greatly achieved in the use of groundwater. The controller 14 can stop the inflow of the water-cooled heat source (latent heat). The controller 14 takes measures even when the non-defrost heat pump device 1 is in failure or during a power failure. In addition to these controls, individual or comprehensive control is performed, and ventilation (cooling and heating) according to the growing environment of the crops in the greenhouse A is performed. And this control 14 is based on the construction area of the greenhouse A. Even when a plurality of the non-defrost heat pump devices 1 are installed, etc. It is also possible to produce

  When the control panel 14 is described in detail, a monitoring screen 140 is given. For example, the monitoring screen 140 is provided with two display screens, and one of the monitoring screens 140a is individually selected from multiple buildings (for example, in greenhouses A, B, C, etc.). A graph showing the dry bulb temperature and wet bulb temperature in the greenhouse A as a line graph is displayed. The selection of the greenhouse A is performed individually or in plural (for each group) from the greenhouses A, B, C, etc. on the other monitoring screen 140b. When an emergency such as a disaster is required, the average temperature of all greenhouses is detected and displayed on the display screen so that a plurality of greenhouses A can be controlled comprehensively. Moreover, the graphing by the above-mentioned line graph displayed on the one monitoring screen 140a may be in a form in which the transition of the dry bulb temperature / wet bulb temperature can be visually confirmed. The method of using etc. is also considered as another example. The other monitoring screen 140b digitally displays the dry bulb temperature / wet bulb temperature of a plurality of greenhouses A, B, C, etc. For example, one building of greenhouse A has a dry bulb temperature of 23 ° C./wet bulb A temperature of 18 ° C. is displayed. In addition, for example, when the target temperature setting and the actual temperature are significantly different, one building of the greenhouse A is displayed with a red screen, and the ventilation from the indoor unit 2 is not accurately performed. Or the cause such as the extremely low temperature of the geothermal (water-cooled heat source) is displayed in detail on one monitoring screen 140a. When one of the monitoring screens 140a is not visible, when the administrator is in the distance, at night, etc., the administrator can send an email to the mobile phone of the administrator. Can be recognized immediately, and prompt countermeasures can be taken. Thereby, the loss to the crops and plants of the greenhouse A can be reduced, and deterioration can be avoided. In addition to the above, it is conceivable that two or more monitoring screens 140 may be provided and used to contribute to the above-described effects. In order to visually check the situation in the greenhouse A on the monitoring screen 140, it is also desirable to install a monitoring camera or the like. And providing this surveillance camera can also contribute to crime prevention.

  Hereinafter, the details of each device of the non-defrost heat pump outdoor unit 4 will be described.

  The circulating pump 8 needs to secure the rated circulating water amount from the geothermal piping 50 through the underground heat exchanger 6, and this circulating water amount is changed according to the use of the non-defrost heat pump outdoor unit 4. . When this amount of circulating water (water-cooled heat source) is insufficient, the flow rate of the circulating water amount in the heat exchanger 10 is insufficient (decreased), and the heat exchange rate may be extremely deteriorated. In such a case, a countermeasure is taken via the controller 14.

  The compressor 30 may be either a volume compression type that compresses the refrigerant by a piston, a cylinder, compresses the refrigerant by a volume change by a screw, a rotary, or a scroll, or a centrifugal type that compresses the centrifugal force, The compression form seems to be desirable for adiabatic compression.

  The heat exchanger 10 is attached to the air-cooled heat exchanger 11, and the air-cooled heat exchanger 11 is changed from liquid to gas or gas to liquid. The air-cooled heat exchanger 11 may be made of a material such as titanium, SUS, or copper. In this embodiment, the air-cooled heat exchanger 11 is formed by laminating a plurality of stages of aluminum fins 11a and copper pipes 11b, and the refrigerant is passed through the copper pipe 11b. For example, in order to play a role as a condenser, the gas is cooled and heat is exchanged into a liquid, and in order to play a role as an evaporator, the liquid is heated and converted into a gas. Efficient use of water-cooled heat source (latent heat).

  Next, the indoor unit 2 is suspended from fences, beams, and the like provided near the ceiling of the greenhouse A through locking means 21 such as hooks provided in the duct 20 (cylinder) portion. The locking position of the locking means 21 is arbitrary, and the indoor unit 2 can be suspended in a stable state, and the air itself is uniformly distributed throughout the greenhouse A, centering on crops and plants. It can be performed evenly, and an optimum temperature environment / humidity environment is generated for the crops in the greenhouse A. It can be considered that the indoor unit 2 can be blown into the greenhouse A from the outside of the greenhouse A (outside of the greenhouse A) so as to face the wife surface of the greenhouse A. In order to avoid intrusion of water and dust, a structure in which the indoor unit 2 is provided with a covering such as a hood, a cover, and a net is also possible.

  The indoor unit 2 is provided with a duct hose of the greenhouse A at the discharge port. In addition, this duct hose 22 is provided with a stretching property and flexibility, for example, this duct hose 22 is installed along the longitudinal direction of the greenhouse A. Hot air or cold air is blown so as to be directly below the ejection hole 22a opened at the lower end of the duct hose 22. As described above, the use of a stretchable material is optimal for storage and storage when the duct hose 22 is replaced or stopped. In addition, since the duct hose 22 is provided with flexibility, the depression angle and angle adjustment can be performed.

  Next, the flow of the water-cooled heat source will be described as an example of the heating operation in the winter season. The underground heat exchanger 6 is used to convert the latent heat (geothermal) in the ground of the greenhouse A into geothermal heat or groundwater water-cooled heat source as geothermal heat. The piping 50 sucks in by the circulation pump 8.

Then, the absorbed water-cooled heat source is led to the heat exchanger 10 in the non-defrost heat pump outdoor unit 4 and is heated by the air-cooled heat source by the blower 15 provided in the vicinity of the heat exchanger 10. Wind or cold air is blown to the air-cooled heat exchanger 11 and, for example, a water-cooled heat source is sent so as not to reach the defrost cycle temperature range. The water-cooled heat source blown to the air-cooled heat exchanger 11 prevents frost formation of the air-cooled heat exchanger 11 and prevents the temperature of the air-cooled heat exchanger 11 from decreasing.

  When the air blower 15 is provided with a rectifying blade (rectifying plate), a straight wind flow can be generated, and the air can be efficiently sent by the blower 15. The blower 15 is provided with a duct at the discharge port, and by changing the shape of the duct, the shape of the blades, the number of sheets, the output amount of the motor, etc., the amount of the refrigerant fed can be adjusted. The loss of the refrigerant is reduced according to the capacities of the exchanger 10 and the air-cooled heat exchanger 11.

That is, the water-cooling heat source led to the exchanger 10 plays a role of heating and adjusts the temperature range so as not to reach the defrost cycle temperature range. In addition, the refrigerant | coolant produced | generated with the air-cooling type heat exchanger 11 can perform heating operation continuously, without performing a defrost cycle. Note that the refrigerant reaching the compressor 30 is generated into a higher-temperature gaseous refrigerant. And the refrigerant | coolant produced | generated by this compressor 30 flows in into the indoor unit 2 via the refrigerant | coolant piping 3, and warm air is blown into the greenhouse A. FIG. In summer, the water-cooled heat source (latent heat) absorbed by the underground heat exchanger 6 reaches the heat exchanger 10 as described above. And since it can cool by the water-cooling heat source led to the heat exchanger 10 , and the temperature rise by the external temperature can be lowered | hung, the ratio which consumes the electric power is suppressed. In addition, as a method of exhaust heat (heat radiation), the water-cooled heat source reduced by the heat exchanger 10 plays a role of being returned to the ground via the geothermal pipe 50 .

  Next, a method for using groundwater will be described.

  First, 31 is a water storage tank for storing well water, ground water, tap water, water storage tank (hereinafter referred to as well water) provided in the vicinity of the greenhouse A and underground, and the water in the water storage tank 31 is a circulation pump. The well water pipe 51 for pumping up to 10 and the non-defrost heat pump outdoor unit 4 communicating with the well water pipe 51 are connected. As this water, ordinary water is used, but it is not necessarily required to be liquid as long as it is liquid. If the power of the circulation pump 8 can be reduced, and the size and diameter of the pipe can be further reduced, it is possible to use other liquids sufficiently. In addition, it is necessary to consider thermal conductivity. In addition to these waters (liquids), it is also possible to use hot water flowing out from hot spring facilities, factories, etc., or to use sewage heat, etc. When it is cold, it is considered that these waters can be used to effectively use the groundwater. When using groundwater, the use of a dedicated well provided for greenhouse farming makes it possible to provide a stable supply of groundwater without the need to excavate piping.

  And since the water tank 31 bears the same function as the underground heat exchanger 6, the water cooling heat source is provided by the well water pipe 51 and the water tank 31 in the same manner as the relationship between the underground heat exchanger 6 and the geothermal pipe 50. It absorbs heat.

  And the flow of the water-cooling heat source / refrigerant at the time of air-conditioning using the non-defrost heat pump outdoor unit 4 and the indoor unit 2 by the water storage tank 31 using the ground water is, in principle, intended for geothermal use, its structure and use Are omitted because they are the same.

  Next, the refrigerant will be described. If the refrigerant in the non-defrost heat pump outdoor unit 4 and the indoor unit 2 undergoes a phase change from liquid to gas (vapor), in principle, air, water Anything including the above can be used, but the refrigerant is used in comparison with the operating temperature and the heat source temperature level. In addition, this refrigerant | coolant is R410A which is a mixed refrigerant of HFC, and since ODP (ozone destruction coefficient) is 0, it is friendly to the global environment and is considered suitable for use. In addition to this refrigerant, examples of the mixed refrigerant include R404A and R407A. And by adopting this new refrigerant R410A, it leads to energy saving, and it is considered that high thermal energy with a coefficient of performance of 3.5 or more can be obtained.

  And as an auxiliary function, during the night before the day of use, using a heat source machine, in summer, cold heat (water) or other cold heat storage is stored in a heat storage tank, and in winter, heat storage such as hot water is stored. Is also stored in a heat storage tank and used during the daytime.By using the heat storage tank, low-cost electricity at nighttime is used, and the economic efficiency during cooling and heating during the daytime is increased. , Energy efficiency that can be efficiently operated at rated power can be secured, and the power used for air conditioning is used at night during peak hours during the daytime, resulting in a power load leveling effect throughout the day that shifts to nighttime. And can contribute to the reduction of carbon dioxide. And this use temperature range (set temperature range) is wide. For example, during the cooling operation, the outdoor dry bulb temperature can be used at 25 ° C. to 43 ° C., and during the heating operation, the outdoor dry bulb It can be used at a temperature of −10 ° C. to 21 ° C., and can be used in a wide range.

FIG. 1 is a system diagram showing an outline of the whole in an example using a ground heat exchanger of a non-defrost heat pump device. FIG. 2 is another example of FIG. 1, and is a system diagram showing an outline of the whole in an example using groundwater. Figure 3-1 is a front view of the indoor unit 3-2 is a plan view of FIG. 3-1. Fig.3-3 is a side view of Fig.3-1 Fig. 4-1 is an elevation view of a non-defrost heat pump outdoor unit 4-2 is a side view of FIG. 4-3 is a back view of FIG. Fig. 5 is a front view of the underground exchanger Fig. 6 is a schematic diagram showing the temperature change in the ground for one year. FIG. 7 is a front view showing an example of a monitoring screen.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Non-defrost heat pump apparatus 2 Non-defrost heat pump indoor unit 20 Duct 21 Locking means 22 Duct hose 22a Ejection hole 3 Refrigerant piping 3a Open / close valve 4 Non-defrost heat pump outdoor unit 50 Geothermal piping 51 Well water piping 6 Ground heat exchanger 8 Circulation Pump 8a Power means 10 Heat exchanger 11 Air-cooled heat exchanger 14 Controller 140 Monitoring screen 140a One monitoring screen 140b The other monitoring screen 15 Blower 30 Compressor 31 Water tank A Greenhouse

Claims (3)

An indoor unit provided in a greenhouse for horticultural cultivation, a refrigerant pipe for inflow or outflow of a refrigerant connected to the indoor unit, a non-defrost heat pump outdoor unit in which a refrigerant pipe is connected to the indoor unit, Non-defrost heat pump for horticultural cultivation, characterized in that a heat exchanger is installed to absorb the geothermal or groundwater water cooling heat source (latent heat) connected to the defrost heat pump outdoor unit, and a blower is provided in the vicinity of the heat exchanger. apparatus.
In the non-defrost heat pump device for horticultural cultivation according to claim 1,
To the heat exchanger, a ground heat exchanger buried in the ground and a water-cooled heat source absorbed by the ground heat exchanger flow into the heat exchanger, or the exhaust heat from the heat exchanger is reduced to the ground A non-defrost heat pump device for horticultural cultivating, characterized in that a geothermal piping is provided.
In the non-defrost heat pump device for horticultural cultivation according to claim 1,
The heat exchanger is submerged in a water tank (referred to as groundwater) such as ground water, well water, or a water tank, and is provided with a well water pipe for introducing a water-cooled heat source or returning the water-cooled heat source to ground water. Non-defrost heat pump device for horticultural cultivation.

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