JP2005300115A - Air heat source heat pump type air conditioner for agriculture - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an air heat source heat pump type agricultural air conditioner capable of temperature-controlling a plurality of air-conditioned spaces different in temperature control areas at a low cost. <P>SOLUTION: A compression type heat pump A is provided in a casing 1. Low-temperature control side air-conditioned spaces L of the plurality of air-conditioned spaces different in the temperature control areas are communicated to supply air cooled in an evaporator 2 of the heat pump A thereto. High-temperature control side air-conditioned spaces H of the plurality of air-conditioned spaces are communicated to supply air heated in a condenser 3 of the heat pump A thereto. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an air heat source heat pump type air conditioner for agricultural industry.

  Air conditioning for agricultural products, such as greenhouses and low-temperature warehouses for grains, has a wider temperature range to be controlled than for humans, and each temperature is controlled by heating and cooling using dedicated air conditioners. However, when there are a plurality of air-conditioned spaces having different temperature control areas, an air conditioner must be installed for each air-conditioned space, which increases the cost.

JP 2002-267283 A

  The problem to be solved is that the equipment cost and the operating cost increase when the temperature of a plurality of air-conditioned spaces with different temperature control regions is controlled.

  In order to solve the above-mentioned problems, the present invention includes a compression heat pump in a casing, and air cooled by an evaporator of the heat pump in a low-temperature-controlled air-conditioned space of a plurality of air-conditioned spaces having different temperature control regions. Are communicated so that air heated by the condenser of the heat pump is supplied to the high-temperature control side air-conditioned space of the plurality of air-conditioned spaces. Alternatively, a compression heat pump is provided in the casing, and the air cooled by the evaporator of the heat pump is supplied to the low-temperature controlled air-conditioned space and the high-temperature controlled air-conditioned space of a plurality of air-conditioned spaces having different temperature control areas. And communicated so that air heated by the condenser of the heat pump is supplied to the low-temperature control-side air-conditioned space and the high-temperature control-side air-conditioned space, and the cooling air The most important feature is that a damper mechanism is provided which can adjust the amount of air flow for each of the heated air.

According to the first and second aspects of the present invention, it is possible to control the temperature of a plurality of air-conditioned spaces having different temperature control areas with a single air conditioner, thereby reducing the equipment cost and the operating cost. Without throwing away the air heat exchanged by the evaporator and condenser of the heat pump, both can be used for temperature control and there is no waste.
According to the second aspect of the present invention, temperature control can be performed even when the outside air temperature is lower than the temperature control range of the low-temperature control-side air-conditioned space or when the outside temperature is higher than the temperature control range of the high-temperature control-side air-conditioned space.
According to the invention of claim 3, since the humidity can be controlled, air conditioning more effective for promoting the growth of agricultural products and maintaining freshness can be performed.
According to the invention of claim 4, since the evaporators or condensers of the first and second heat pumps are shared, the number of parts can be reduced and the size can be reduced. Since the evaporator or the condenser shares the fin group, the heat transfer area is increased, and the heat exchanging capacity is increased even when only one of the first and second heat pumps is operated. When one of the refrigerants of the first and second heat pumps evaporates and the other condenses in the common evaporator or condenser, heat exchange between the refrigerants can also be performed, increasing COP and saving energy.
According to the invention of claim 5, since the pressure loss is reduced and the heat exchange efficiency is improved, a small blower can be used and noise can be reduced. The evaporator and condenser can also be miniaturized and the air conditioner can be made compact.

  1 and 2 show one embodiment of an air heat source heat pump type air conditioner for agricultural industry according to the present invention, and solid and dotted white arrows indicate the direction of the wind. This air conditioner has a compression heat pump A, an evaporator 2 and an air supply fan 6 provided with an air supply fan 6, a condenser 3, a humidifier 5, and an air supply fan 7 in a casing 1. The air cooled by the evaporator 2 of the heat pump A is supplied to the low-temperature control-side air-conditioned space L of a plurality of air-conditioned spaces having different temperature control areas. While making it communicate, it connects so that the air heated with the condenser 3 of the heat pump A may be supplied to the high temperature control side air-conditioned space H of several air-conditioned space.

  The low-temperature controlled air-conditioned space L is a storage warehouse for potatoes and grains, and the high-temperature controlled air-conditioned space H is a greenhouse for vegetable and fruit cultivation. Both L and H are on different floors in the same building. There are various freedoms, for example, in the case of providing or on the same floor isolated from each other. For example, in the case of different floors, the first floor is used as a warehouse without windows (low-temperature control-side air-conditioned space L) to block solar radiation heat, and the second floor is used as a greenhouse with skylights (high-temperature control-side air-conditioned space H). Energy saving can be achieved through use. As an example of the temperature control region, the low-temperature control-side air-conditioned space L is 5 ° C to 15 ° C, and the high-temperature control-side air-conditioned space H is 20 ° C to 35 ° C. In the illustrated example, the humidifier 5 is disposed leeward of the condenser 3 in the condensation side air passage 9, but is disposed only in the lee of the evaporator 2 in the evaporation side air passage 8, or the condensation side air passage 9. You may arrange | position both in the lee of the condenser 3 and the lee of the evaporator 2 of the evaporation side ventilation path 8.

  The evaporation side air passage 8 communicates with the low temperature control side air-conditioned space L through the air supply air passage 10 such as a duct and the return air air passage 11 so as to circulate air, and the condensation side air passage 9 is connected to the high temperature control side air conditioning. The air is communicated with the space H via a supply air blowing path 10 such as a duct and a return air blowing path 11. The casing 1 is provided with an outside air inlet, and communicates with the evaporation side air passage 8 and the condensation side air passage 9 so that the outside air is passed through the evaporator 2 and the condenser 3. The return air and outside air (supply air) of the evaporation side air passage 8 and the condensation side air passage 9 are freely adjustable in air volume by a damper. When exhaust is required from the low-temperature control-side air-conditioned space L and the high-temperature control-side air-conditioned space H, it is performed by an unillustrated exhaust fan or the like. In the illustrated example, the return air and the outside air are mixed and supplied. However, the configuration can be freely changed to only the return air circulation or only the outside air supply.

  The heat pump A includes a condenser 3 that dissipates heat to air-conditioning air and condenses the circulating refrigerant, an evaporator 2 that absorbs heat from the air-conditioning air and evaporates the circulating refrigerant, a compressor 4, an expansion valve, and an illustration not shown. A liquid receiver, etc., which are connected by piping to form a refrigerant circulation circuit. The fin tubes of the evaporator 2 and the condenser 3 are preferably elliptical tubes with little pressure loss, but may be circular tubes.

  FIG. 3 shows another embodiment, in which a compression heat pump A is provided in the casing 1, and the heat pump A is provided in the low-temperature control side air-conditioned space L and the high-temperature control side air-conditioned space H of a plurality of air-conditioned spaces having different temperature control regions. The air cooled by the evaporator 2 is communicated so as to be supplied, and the air heated by the condenser 3 of the heat pump A is supplied to the low-temperature control-side air-conditioned space L and the high-temperature control-side air-conditioned space H. A damper mechanism D is provided, which is connected so as to be supplied with air and the air volume of the cooling air and the heating air can be adjusted.

  The evaporation side air passage 8 communicates with the low-temperature control side air-conditioned space L and the high-temperature control side air-conditioned space H through the air supply air passage 10 such as a duct and the return air air passage 11 so as to circulate through the air. The condensing side air passage 9 also communicates with the high-temperature control side air-conditioned space H and the low-temperature control side air-conditioned space L via the air supply air passage 10 such as a duct and the return air air passage 11 so as to circulate air. The casing 1 is provided with an outside air inlet, and communicates with the evaporation side air passage 8 and the condensation side air passage 9 so that the outside air is passed through the evaporator 2 and the condenser 3. Further, the casing 1 is provided with an exhaust port and communicates with the evaporation side air passage 8 and the condensation side air passage 9. The air supply and exhaust on the outlet side of the evaporation side air passage 8 and the condensation side air passage 9 and the outside air and return air on the inlet side are made adjustable by a damper. The damper mechanism D may be constituted by the dampers for the air supply, exhaust, outside air, and return air of the casing 1 and the dampers of the supply air supply passage 10 and the return air supply passage 11. Can be arranged in different parts from the example or increase or decrease the number. In addition, the air supply air passage 10 and the return air air passage 11 may be configured other than the illustrated examples (for example, how to connect them). When exhaust is required from the low-temperature control-side air-conditioned space L and the high-temperature control-side air-conditioned space H, it is performed by an exhaust fan (not shown).

  In this case, not only the cooling air is supplied to the low-temperature control side air-conditioned space L by the damper mechanism D and the heated air is supplied to the high-temperature control side air-conditioned space H to control the temperature. The temperature is controlled by supplying heated air to both the low-temperature control side air-conditioned space L and the high-temperature control side air-conditioned space H at a temperature lower than the temperature control range of the air-conditioned space L, or the outside temperature is high It is possible to respond to temperature control by supplying cooling air to both the low-temperature control side air-conditioned space L and the high-temperature control side air-conditioned space H at a temperature higher than the temperature control range of the air-conditioned space H. For example, when heated air is supplied to both the low-temperature control-side air-conditioned space L and the high-temperature control-side air-conditioned space H, the damper mechanism D is used to control the high-temperature control between the low-temperature control-side air-conditioned space L and the condensation-side air passage 9. Air is circulated between the side air-conditioned space H and the condensing side air passage 9, and only the outside air is taken in the evaporation side air passage 8 and exhausted outside without being supplied to the air-conditioned space. When cooling air is supplied to both the low-temperature control-side air-conditioned space L and the high-temperature control-side air-conditioned space H, the damper mechanism D is used between the low-temperature control-side air-conditioned space L and the evaporation side air duct 8 and the high-temperature control side. Air is circulated between the air-conditioned space H and the evaporation-side air passage 8, and only the outside air is taken in the condensation-side air passage 9 and exhausted outside without supplying air to the air-conditioned space. Alternatively, the return air and the outside air can be mixed and supplied, or only the outside air can be supplied. In each of the above embodiments, as shown in FIG. 4, the first and second heat pumps A and A are provided with the first and second compression heat pumps A and A. May be shared. Alternatively, conversely, the first and second heat pumps A and A may be shared by using one evaporator 2. (Not shown)

The simplified explanatory drawing which shows the Example of the air heat source heat pump type air conditioner for agricultural industries. The simplified explanatory drawing of a heat pump. The simplified explanatory view showing other examples. The simplified explanatory drawing of other heat pumps.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Casing 2 Evaporator 3 Condenser A Heat pump D Damper mechanism L Low-temperature control side air-conditioned space H High-temperature control side air-conditioned space

Claims (5)

  A compression heat pump A is provided in the casing 1 so that the air cooled by the evaporator 2 of the heat pump A is supplied to the low-temperature control side air-conditioned space L of a plurality of air-conditioned spaces having different temperature control areas. Agricultural industry characterized in that the air heated by the condenser 3 of the heat pump A is communicated with the high-temperature control side air-conditioned space H of the plurality of air-conditioned spaces. Air heat source heat pump air conditioner.   The casing 1 includes a compression heat pump A, and is cooled by the evaporator 2 of the heat pump A into the low-temperature control side air-conditioned space L and the high-temperature control side air-conditioned space H of a plurality of air-conditioned spaces having different temperature control regions. The air heated by the condenser 3 of the heat pump A is supplied to the low-temperature control side air-conditioned space L and the high-temperature control side air-conditioned space H. An air heat source heat pump type air conditioner for agricultural industry, characterized in that a damper mechanism D is provided that allows the cooling air and the heating air to be adjusted in air volume.   The air heat source heat pump type air conditioner for agricultural industry according to claim 1 or 2, wherein the humidifier 5 is disposed downstream of the condenser 3 or downstream of the condenser 3 and downstream of the evaporator 2.   The first and second compression heat pumps A and A are provided, and the evaporator 2 or the condenser 3 is used as one, and the first and second heat pumps A and A share the same. The air heat source heat pump type air conditioner for agriculture industry as described.   The air heat source heat pump type air conditioner for agricultural industry according to claim 1, 2, 3, or 4, wherein the fin tubes of the evaporator 2 and the condenser 3 are elliptical tubes.

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