JP2950227B2 - Air conditioner - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for controlling the temperature in a room of a building (hereinafter referred to as a house) for plant cultivation or the like which requires a relatively high humidity environment. Related to the operation control of air conditioners,
It relates to measures to optimize the indoor environment when the temperature control operation is stopped (when the thermostat is turned off).

[0002]

2. Description of the Related Art Conventionally, in a house for cultivating edible plants such as shiitake mushrooms, the temperature and humidity in the room greatly affect the growth of the plants. For this reason, in this type of house, it is necessary to maintain the temperature and humidity suitable for growth throughout the indoor space.

[0003] In view of this point, in general, this type of house is provided with an air conditioner for indoor cooling, a boiler for heating, a sprayer for humidification, a ventilation fan for ventilation, and the like. The indoor space is maintained in an environmental state suitable for the growth of plants by appropriately combining.

[0004] The operation of the air conditioner will be described. When the room temperature is higher than a predetermined set temperature, the air conditioner enters a thermo-on state and supplies low-temperature conditioned air to the room with a relatively large blowing air volume. When the room temperature reaches the set temperature, the thermostat is turned off. If the amount of air blown out is increased in this thermo-off state in the same manner as in the thermo-on state, moisture on the surface is deprived by an air current flowing on the surface of the plant, and the plant may be dried and adversely affect the growth. . Therefore, at the time of the thermo-off, the supply of air is stopped.

FIG. 3 shows an electric circuit for driving an indoor fan in a conventional air conditioner. As shown in FIG.
An indoor fan motor (MF) is connected to a power supply line (L) having an indoor fan relay switch (RY-FS) having an a contact. The power line (L) has a temperature switch (TS) that switches according to the deviation of the room temperature from the set temperature and that closes when the room temperature becomes higher than a predetermined range.
And a compressor circuit (a) in which a compressor relay coil (RY-CC) is connected in series. In addition, an interlock circuit (b) in which an interlock release switch (SS) for selecting interlock or non-interlock of the fan motor (MF) for the thermo-on / off state, and a fan interlock relay coil (RY-UC) are connected in series.
Are connected in parallel to the compressor circuit (a). Furthermore,
A fan circuit (c) having an indoor fan relay coil (RY-FC) for switching the indoor fan relay switch (RY-FS) is connected in parallel to the compressor circuit (a) and the interlocking circuit (b). . This fan circuit (c) has a fan-linked relay switch (RY-US) that is switched by a fan-linked relay coil (RY-UC).
(RY-UC), the indoor fan relay coil (RY-UC)
FC) to the power supply line (L), the first connection line (d1)
While the fan-linked relay switch (RY-US) is switched to the side, while the fan-linked relay coil (RY-UC) is not energized, the indoor fan relay coil (RY-FC) is connected to the compressor relay switch (a RY-CS) with second connection line
Change the fan-linked relay switch (RY-US) to the (d2) side,
The indoor fan relay coil (RY-FC) is connected to the power line (L) only when the compressor relay switch (RY-CS) is closed due to the excitation of the compressor relay coil (RY-CC). .

With this configuration, when the room temperature becomes higher than a predetermined range and the temperature switch (TS) is closed to excite the compressor relay coil (RY-CC), the compressor relay switch (RY-CS) is excited. ) Is closed. At this time, the interlock release switch (SS) is opened and the fan interlock relay coil
When (RY-UC) is de-energized, the indoor fan relay switch (RY-FS) is closed and the indoor fan motor (MF) is driven by the excitation of the indoor fan relay coil (RY-FC). . On the other hand, when the room temperature falls within the predetermined range, the temperature switch (TS) is opened and the compressor relay coil (RY-C
C) is de-energized, the compressor relay switch (RY-CS) is open and the indoor fan relay coil (RY-FC)
Is de-energized and the indoor fan relay switch (RY-F
S) is opened and the indoor fan motor (MF) stops.
That is, when the interlock release switch (SS) is in the open state, the supply and stop of air are switched according to the thermo-on and off states.

When the interlock release switch (SS) is closed and the fan interlock relay coil (RY-UC) is in the excited state, the fan interlock relay switch (RY-US) is connected to the first connection line (d1). ) Side, the indoor fan relay coil (RY-FC) is always in the excited state, and the indoor fan motor (MF) is always driven regardless of the indoor temperature.

In the normal state, the interlock release switch (S
S) is kept open, and as described above, the air is supplied when the thermostat is turned on and the air supply is stopped when the thermostat is turned off, thereby suppressing the drying of the plant.

[0009]

However, when air supply and stop are switched according to the thermo-on and off states as described above, the temperature distribution in the room tends to be non-uniform at the time of thermo-off. That is, at the time of the thermo-off, the air flow in the room is lost, so that the lower part of the room has a lower temperature and the upper part thereof has a higher temperature. For this reason, like a rack for cultivating shiitake mushrooms, a plurality of shelves are provided in the vertical direction and plants are arranged on each shelf, so that the growth state of the plant differs for each shelf, It was difficult to stably secure the required growing conditions and yields.

[0010] The present invention has been made in view of this point, and improves the state of air supply to the indoor space of a house for plant cultivation, etc., so that the growth of plants can be obtained in a house. The purpose is to secure the environment.

[0011]

In order to achieve the above-mentioned object, the present invention provides a method for controlling the temperature of a house by reducing the amount of air supplied to the house when the temperature control operation is stopped as compared with the temperature control operation. The temperature distribution was made uniform and drying of the target object such as a plant was suppressed.

Specifically, as shown in FIG. 1, the invention according to claim 1 is installed in a room (H) in which an object (A) required to be placed in an environment of high humidity and medium temperature is arranged. It is assumed that the air conditioner performs the temperature control operation when the room temperature is outside the predetermined range, and stops the temperature control operation when the room temperature is within the predetermined range. And an air supply unit in which the supply amount of air to the room (H) is variable; and, during the temperature control operation, the supply amount of conditioned air from the air supply unit is set to a predetermined amount, while the temperature control operation is stopped. At this time, the air flow rate for changing the air supply amount from the air supply means to a drying suppression amount smaller than the predetermined amount so as to make the temperature distribution throughout the room (H) uniform and suppress the drying of the object (A). The control means (10) is provided.

Here, the high humidity state required by the object (A) refers to, for example, when the object (A) is a plant or food, a relatively high humidity (for example, relative humidity) such that the surface does not dry out. 80% or more). The medium temperature range required by the object (A) is, for example, a temperature range of about 10 to 20 ° C.
℃) and refrigeration temperature for long-term storage of food (eg 5 ℃)
And a temperature particularly suitable for plant growth and the like.

With such a configuration, when the temperature control operation is stopped, the air flow control means (10) reduces the amount of air supplied from the air supply means to a drying suppression amount smaller than the supply amount during the temperature control operation. Be changed. Therefore, even when the temperature control operation is stopped, the air in the room can be circulated, and the temperature distribution in the room can be prevented from becoming uneven. In addition, since the amount of circulating air at this time is small, the surface of the object (A) does not dry.

According to a second aspect of the present invention, in the air conditioner of the first aspect, the supply amount of the conditioned air during the temperature control operation is always constant, and the drying suppression amount is controlled during the temperature control operation. About half of the supply. With this configuration, it is possible to obtain an air supply amount necessary for making the temperature distribution in the room uniform and suppressing drying of the surface of the object (A).

According to a third aspect of the present invention, in the air conditioner of the first aspect, the air supply amount from the air supply means set by the air volume control means (10) when the temperature control operation is stopped is reduced by the drying suppression amount. A switching means (TM) capable of switching between a drying suppression mode to be set to zero and a stop mode to be set to zero is provided. With this configuration, it is possible to change the air supply amount from the air supply unit when the temperature control operation is stopped, if necessary. In other words, in situations where there is no concern that the temperature distribution in the room (H) will be uneven or the surface of the object (A) will be dry, setting the stop mode will prevent unnecessary ventilation and prevent running. Cost can be reduced.

According to a fourth aspect of the present invention, in the air conditioner of the third aspect, the switching means (TM) can switch between a drying suppression mode and a stop mode depending on a time zone. With this configuration, a configuration for obtaining the effect according to the third aspect of the invention can be specifically obtained.

[0018]

Next, embodiments of the present invention will be described with reference to the drawings. In the present embodiment, a case will be described in which the present invention is applied to an air conditioner provided in a house for cultivating shiitake mushrooms, in which the management of temperature and humidity is particularly important as a house for plant cultivation.

FIG. 1 shows the inside of a house (H) according to this embodiment. Thus, in the house (H), the mushroom (A)
Multi-stage shelves (1a, 1) on which cultivation bacterial beds (T, T,…) are arranged
a,...) are arranged.
Specifically, in the present embodiment, six shelves (1a, 1a,
…)) With 10 racks (1,1,…)
Are arranged in two rows in the longitudinal direction.

The house (H) includes the house
An air conditioner (2) is provided for cooling the inside of the house (H) when the temperature in (H) becomes higher than the optimum temperature for growing the shiitake mushroom (A) as an object. I have. Hereinafter, the air conditioner (2) will be described.

The air conditioner (2) is an outdoor unit (3)
And an indoor unit (4) are connected by a refrigerant pipe (5), and two air conditioning units (2a) are provided. The indoor unit (4) of each air conditioning unit (2a) is suspended near the wall on both sides in the longitudinal direction of the house (H).
(H) The air is blown out toward the center of the interior.

The outdoor unit (3) comprises an outdoor casing (3a)
Inside, a compressor, a condenser, an outdoor fan, an accumulator, and the like (not shown) are housed.On the other hand, an indoor unit (4) includes an expansion valve, an evaporator, an indoor fan as air supply means, etc. in an indoor casing (4a). Is housed. The indoor casing (4a) is provided with an air inlet (not shown) on the lower surface and an air outlet on the front surface (the surface facing the center of the house). A plurality of (three in the horizontal direction in this embodiment) outlet ducts (3b, 3b, ...) are connected to the air outlet. Each of the ducts (3b, 3b,...) Has flexibility so that the blowing direction of the conditioned air can be changed.

During the operation of the air conditioning unit (2a), the refrigerant gas, which has become high temperature and high pressure in the compressor, is condensed and liquefied in the condenser along with the operation of the compressor, and then the indoor unit (4)
The air is decompressed by the expansion valve, evaporates by the evaporator, and exchanges heat with the air introduced into the indoor casing (4a) from the air suction port to cool the air. Then, the cooled air-conditioning air flows from the outlet duct (3b, 3b,…) to the house.
(H) It is blown out inside.

The feature of this embodiment lies in the drive control of the indoor fan provided in the indoor unit (4). FIG. 2 shows a driving electric circuit of the indoor fan according to the present embodiment. Hereinafter, this electric circuit will be described.

As shown in FIG. 2, an indoor fan motor (MF) is connected to a power supply line (L) having an indoor fan relay switch (RY-FS) having an a contact. The indoor fan motor (MF) is provided with an H tap line (LH) and an L tap line (LL), and each tap line for the power line (L) is provided by a tap change relay switch (RY-TS). The connection state of (LH, LL) can be switched. In other words, tap change relay switch (RY-TS)
When the H tap line (LH) is connected to the power supply line (L), the indoor fan motor (MF) is driven at high speed, while when the L tap line (LL) is connected, the indoor fan motor (MF) is driven. Low speed rotation (about half the number of rotations of the above high speed rotation)
, And the drying suppression amount is set to be smaller than the blowing amount of the H tap. The air volume control means (10) is configured in this manner.

The power supply line (L) includes a temperature switch (TS) which is switched according to a deviation of the room temperature from the set temperature and is closed when the room temperature becomes higher than a predetermined range, and a compressor. A compressor circuit (a), which is formed by connecting a relay coil (RY-CC) in series, is connected. The compressor circuit (a) is connected in parallel with the compressor relay coil (RY-CC), and the tap change relay coil (RY-T
C) is provided. The tap change relay switch (RY-TS) is connected to the tap change relay coil (RY-TS).
In the excited state of (TC), the connection is switched to the H tap line (LH), and in the unexcited state, the connection is switched to the L tap line (LL).

An interlocking switch (SS) for selecting whether or not to interlock the switching between the H tap and the L tap of the fan motor (MF) with respect to the thermo on / off state, and a timer relay (M) to be described later for opening / closing operation. Timer switch (TM-
An interlocking circuit (b) in which S) and a fan interlocking relay coil (RY-UC) are connected in series is connected in parallel to the compressor circuit (a). A timer circuit (e) including a timer relay (M) that switches between an energized state and a non-excited state by a timer (TM) that can be arbitrarily set to ON / OFF switching according to a time zone includes an interlocking circuit (b) ) Are connected in parallel.
The timer switch (TM-S) is closed when the timer (TM) is energized when the timer (TM) is turned on, and is open when the timer relay (M) is not energized when the timer is turned off. Becomes For example, during the daytime (6:00 am to 6:00 pm), the timer (TM) is turned on, and at night (6:00 pm to 6:00 am), the timer (TM) is turned off. (TM-S) open / close switching can be set arbitrarily. That is, this timer (TM) constitutes switching means capable of switching between a drying suppression mode in which the amount of air supplied from the indoor fan is L tap when the thermostat is turned off and a stop mode in which the air supply amount is zero.

Further, the indoor fan relay switch (RY-
FS), the fan circuit (c) equipped with an indoor fan relay coil (RY-FC)
(b) is connected in parallel. This fan circuit (c) has a fan-linked relay switch (RY-US) that is switched by a fan-linked relay coil (RY-UC).
When the fan interlock relay coil (RY-UC) is excited, the fan interlock relay switch (RY-UC) is connected to the first connection line (d1) connecting the indoor fan relay coil (RY-FC) to the power line (L). US) while the fan-linked relay coil (R
(Y-UC), the indoor fan relay coil (RY-UC
FC) is switched to the fan connection relay switch (RY-US) to the second connection line (d2) side equipped with a compressor relay switch (RY-CS) with a contact, and the compressor relay coil (RY-CC) The indoor fan relay coil (RY-FC) is connected to the power line (L) only when the compressor relay switch (RY-CS) is closed due to the excitation.

Although the air conditioner (2) has been described above, the house (H) is provided with a boiler for indoor heating (not shown), a sprayer for humidification, a ventilation fan for ventilation, and the like. The roof is transparent, and is provided with a blind which can be opened and closed along the inside of the roof.

Next, an operation for adjusting the internal environment of the house (H) configured as described above will be described. In the summer, the air conditioner (2) operates in the winter, and the boiler operates in winter.In the middle of spring and autumn, the air conditioner (2) operates in the daytime, and the boiler operates in the nighttime. Equal and house
The temperature in (H) is maintained in a temperature environment (eg, 15 ° C.) suitable for the growth of Shiitake (A). At the same time, by adjusting the operating conditions of the sprayer and the ventilation fan, the humidity in the house (H) can be adjusted to a humidity environment suitable for the growth of the shiitake mushroom (A) (for example, a relative humidity of 80).
%). Furthermore, the sunlight to be introduced into the house (H) is adjusted by opening and closing the blinds.

The operation of each air-conditioning unit (2a) of the air conditioner (2) will be described in detail. When the temperature in the house (H) becomes higher than a set temperature, a thermo-on state is established and the compressor is driven. At the same time, when the indoor fan is driven by the H tap having a relatively large air volume, low-temperature conditioned air is introduced into the house (H) to cool the house (H) (temperature control operation). On the other hand, when the temperature in the house (H) reaches the set temperature, the thermostat is turned off, the compressor is stopped, and the indoor fan is driven by the L tap, which has a flow rate of about half of the H tap. Hereinafter, the tap switching operation of the indoor fan will be described with reference to the electric circuit of FIG.

The tap switching operation of the indoor fan is performed when the interlocking switch (SS) is closed and the timer (TM) is turned on. In other words, the interlocking switch (SS) is operated to be closed, the timer (TM) is set to ON, and the timer switch (TM-S) is closed during the energization of the timer relay (M). Will be In this state, the fan interlocking relay coil (RY-UC) is energized, and accordingly, the fan interlocking relay switch (RY-US) is connected to the first connection line (d1).

When the room temperature becomes higher than a predetermined range and the temperature switch (TS) is closed, the compressor relay coil (RY-CC) and the tap switching relay coil (RY-T
C) are excited together. As a result, the compressor relay switch (RY-CS) is closed, and the tap change relay switch (RY-TS) is connected to the H tap line (LH). Therefore, the indoor fan motor (M
F) drives at high speed. Therefore, conditioned air is generated in the indoor unit (4), and the conditioned air is blown into the house (H) with a relatively large air volume.

On the other hand, when the room temperature falls within a predetermined range, the temperature switch (TS) is opened, and the compressor relay coil (R
If both the Y-CC) and the tap change relay coil (RY-TC) are de-energized, the compressor relay switch (RY-TC)
CS) is open and tap change relay switch
(RY-TS) is connected to L tap line (LL). For this reason, the indoor fan motor (MF) is driven at a low speed at the same time when the compressor is stopped. Therefore, in the indoor unit (4), the air sucked from the air
b, 3b, ...) into the house (H) with a relatively small air volume.

In addition, when the interlocking switch (SS) is closed and the timer (TM) is turned off, or when the interlocking switch (S
S) is in the open state and the timer (TM) is ON,
Alternatively, the interlock switch (SS) is opened and the timer (TM)
Is OFF, the fan-linked relay switch is turned off when the fan-linked relay coil (RY-UC) is de-energized.
(RY-US) is always connected to the second connection line (d2). For this reason, a temperature switch associated with a change in the temperature inside the house
(TS) Compressor relay switch (RY-CS)
And the indoor fan relay switch (RY-FS) opens and closes. When the indoor fan relay switch (RY-FS) is closed (when the temperature switch (TS) is closed), the tap change relay switch (RY-TS) is always set to the H tap line.
(LH). Therefore, when the thermostat is turned on, the conditioned air is supplied by the H tap, while when the thermostat is turned off, the air supply is stopped.

As described above, in this embodiment, a relatively large air volume is blown out of the indoor unit (4) when the thermostat is turned on, and a small airflow volume is blown out when the thermostat is turned off. Functions as a circulator for circulating the air in the house (H), thereby preventing the temperature distribution in the house (H) from becoming uneven. Therefore, each shelf (1a, 1a,…)
The ambient temperature of the surroundings can be made approximately equal, and each shelf (1a,
1a,…) can grow the shiitake mushrooms (A, A,…) evenly. Further, since the air volume at the time of the thermo-off is relatively small, the airflow flowing on the surface of the shiitake mushroom (A) deprives the surface of the moisture, and the shiitake mushroom (A) dries and adversely affects the growth. Nor. For this reason, the required growth state and harvest amount can be stably secured.

In this embodiment, a plant cultivation house (H) is used.
Although described as an example of shiitake mushroom cultivation as an example, the present invention is not limited to this, it can also be applied to cultivation houses such as strawberries, fresh flowers, etc., food storage warehouses and food processing rooms, etc. is there.

Further, in the present embodiment, the drying suppression amount, which is the air flow amount when the thermostat is off, is set to about half of the supply amount of the conditioned air when the thermostat is turned on. However, the present invention is not limited to this, and is set to 30% of that when the thermostat is turned on. It can be set to any value. In addition, for example, an air flow adjusting device that can control the phase of a fan motor may be provided so that the drying suppression amount can be appropriately changed according to a request from a house manager.

Furthermore, in this embodiment, the air conditioner (2) is a cooling only machine. However, it may be a heating only machine or may perform both cooling and heating. May be set.

[0040]

As described above, according to the present invention, the following effects can be obtained. According to the first aspect of the present invention, when the temperature control operation is stopped, the temperature of the entire room when the air conditioner provided in the room in which the object to be placed in the environment of high humidity and medium temperature is arranged is stopped. Since the air flow control means for changing the air supply amount from the air supply means to the drying suppression amount is provided so as to make the distribution uniform and suppress the drying of the target object, even when the temperature control operation is stopped, Can be circulated, and the temperature distribution in the room can be equalized. In addition, since the amount of circulating air at this time is small, the surface of the object is not dried. For this reason, when a plant or the like is applied as the target object, the growth state can be made uniform and favorable throughout the room, and the required growth state and harvest amount can be stably secured.

According to the second aspect of the present invention, since the amount of drying suppression is set to about half of the supply amount of the conditioned air during the temperature control operation, it is necessary to make the temperature distribution in the room uniform, and An air supply amount that can suppress drying of the surface of the object can be obtained.

According to the third aspect of the present invention, there is provided switching means capable of switching between a drying suppression mode in which the amount of air supplied when the temperature control operation is stopped is a drying suppression amount and a stop mode in which the air supply amount is zero. Therefore, in a situation where there is no fear that the temperature distribution in the room becomes uneven or the surface of the object dries, it is possible to prevent the air supply means from being driven and to prevent unnecessary blowing. As a result, the running cost can be reduced, and the practicality of the air conditioner can be improved.

According to the fourth aspect of the present invention, since the mode can be switched between the drying suppression mode and the stop mode depending on the time zone, the configuration for obtaining the effect according to the third aspect of the present invention is specifically described. Thus, the practicability of the air conditioner can be further improved.

[Brief description of the drawings]

FIG. 1 is a view showing the inside of a house for cultivating shiitake mushrooms.

FIG. 2 is a diagram showing a fan motor driving electric circuit.

FIG. 3 is a diagram corresponding to FIG. 2 in a conventional example.

[Explanation of symbols]

 (10) Air volume control means (TM) Timer (switching means) (H) House (A) Object (shiitake)

Claims (4)

(57) [Claims] 1. A room (H) in which an object (A) required to be placed in an environment of high humidity and medium temperature is arranged. When the room temperature is out of a predetermined range, a temperature control operation is performed. An air conditioner that stops the temperature control operation when the temperature is within the range; an air supply unit having a variable air supply amount to the room (H); While the supply amount is set to a predetermined amount, when the temperature control operation is stopped, the air supply amount from the air supply means is set so that the temperature distribution throughout the room (H) is uniform and the drying of the object (A) is suppressed. Air volume control means (10) to change the drying suppression amount smaller than the predetermined amount
An air conditioner, comprising: 2. The air-conditioning air supply during the temperature control operation is always constant, while the drying suppression amount is about half of the air-conditioning air supply during the temperature control operation.
The air conditioner according to any one of the preceding claims. 3. A mode in which the air supply amount from the air supply means set by the air volume control means (10) when the temperature control operation is stopped is switched between a drying suppression mode in which the drying suppression amount is set and a stop mode in which the air supply amount is set to zero. 2. An air conditioner according to claim 1, further comprising a possible switching means. 4. The air conditioner according to claim 3, wherein the switching means (TM) can switch between a drying suppression mode and a stop mode according to a time zone.