JPH09210435A - Air-conditioning device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To secure an environment in a house, in which the growth and the like of a plant is available excellently, by a method wherein the supplying condition of air to the indoor space of the house for the cultivation of a plant and the like is improved. SOLUTION: In an air-conditioning device 2 for cooling the indoor of a house H for the cultivation of shiitake mushrooms, when a thermostat is put ON, comparatively big amount of air-conditioning air is supplied into the house H. When the thermostat is put OFF, the amount of air of about half of the air upon putting ON of the thermostat is supplied into the house to circulate the air in the house H. A temperature distribution in the house H is unified and the drying of the surface of the shiitake mushrooms is restrained to secure an environment excellent for the growth of the mushrooms.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is for adjusting the temperature of a building (hereinafter referred to as "house") for plant cultivation, which is required to have a relatively high humidity environment. Related to the operation control of the air conditioner of
Regarding the measures to optimize the indoor environment when the temperature control operation is stopped (when the thermostat is off).

[0002]

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

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, etc., and the operating state of each of these devices. The indoor space is maintained in an environmental condition suitable for plant growth by appropriately combining.

The operation of the air conditioner will now be described. When the room temperature is higher than a predetermined set temperature, the thermo-on state is set and low-temperature conditioned air is supplied to the room with a relatively large blowing air volume. Then, when the indoor temperature reaches the set temperature, the thermostat is turned off. In this thermo-off state, if the amount of air blown out is set to be large like in the thermo-on state, water on the surface of the plant is deprived of water by the air flow, which may cause the plant to dry and adversely affect growth. . Therefore, the air supply is stopped when the thermostat is turned off.

FIG. 3 shows an electric circuit for driving an indoor fan in a conventional air conditioner. As shown in this Figure 3,
The indoor fan motor (MF) is connected to the power supply line (L) equipped with the indoor contact relay switch (RY-FS) that consists of a-contact. In addition, the power line (L) is switched by the deviation of the room temperature from the set temperature, and a temperature switch (TS) that closes when the room temperature rises above a specified range.
And a compressor circuit (a) that is connected in series with a compressor relay coil (RY-CC). An interlocking circuit (b) in which an interlock release switch (SS) that selects interlocking or non-interlocking of the fan motor (MF) for the thermo on / off state and a fan interlocking relay coil (RY-UC) are connected in series.
Are connected in parallel to the compressor circuit (a). Furthermore,
A fan circuit (c) equipped with an indoor fan relay coil (RY-FC) that switches 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) is equipped with a fan interlock relay switch (RY-US) that can be switched by the fan interlock relay coil (RY-UC).
In the (RY-UC) excitation state, the indoor fan relay coil (RY-UC
First connection line (d1) that connects FC) to the power line (L)
The fan interlock relay switch (RY-US) is switched to the side, while the fan interlock relay coil (RY-UC) is de-energized, the indoor fan relay coil (RY-FC) is a compressor relay switch Second connection line with RY-CS)
Switch the fan interlock 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 structure, when the room temperature becomes higher than the predetermined range, the temperature switch (TS) is closed and the compressor relay coil (RY-CC) is excited, the compressor relay switch (RY-CS) is activated. ) Is closed. At this time, the interlock release switch (SS) is opened and the fan interlock relay coil
When (RY-UC) is not excited, 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 is within the specified range and the temperature switch (TS) is open, the compressor relay coil (RY-C
When 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) opens and the indoor fan motor (MF) stops.
That is, when the interlock release switch (SS) is in the open state, air supply and stop can be switched according to the thermo on / off state.

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 energized, and the indoor fan motor (MF) is always driven regardless of the indoor temperature.

At the normal time, the interlock release switch (S
By keeping S) open and supplying air during thermo-on and stopping air supply during thermo-off as described above, the above-described plant drying is suppressed.

[0009]

However, when the air supply / stop is switched depending on the thermo-on / off state as described above, the temperature distribution in the room tends to become non-uniform when the thermo-off is performed. In other words, when the thermostat is turned off, the flow of air disappears in the room, so the temperature in the lower part of the room is low and the temperature in the upper part is high. Therefore, like a rack for cultivating shiitake mushrooms, it is provided with a plurality of shelves in the vertical direction, and in a case where plants are arranged on each shelf, the growth state of the plants is different for each shelf, It was difficult to stably secure the required growth conditions and yields.

The present invention has been made in view of this point, and by improving the supply condition of air to the indoor space of a house for plant cultivation or the like, the inside of the house where the growth of plants can be favorably obtained. The purpose is to secure the environment.

[0011]

In order to achieve the above object, the present invention reduces the air supply amount to the inside of the house when the temperature control operation is stopped, as compared to during the temperature control operation. The temperature distribution was made uniform and the drying of objects such as plants 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) which is required to be placed in an environment of high humidity and medium temperature is arranged. It is premised on the air conditioner that 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. Then, the air supply means in which the supply amount of air to the room (H) is variable, and the supply amount of the conditioned air from the air supply means is set to a predetermined amount during the temperature control operation, while the temperature control operation is stopped. At this time, in order to make the temperature distribution in the entire room (H) uniform and to suppress the drying of the object (A), the amount of air supplied from the air supply means is changed to a drying suppression amount smaller than the above specified amount. The control means (10) is provided.

Here, the high humidity condition required by the object (A) means, for example, when the object (A) is a plant or a food, a relatively high humidity (for example, relative humidity) such that the surface of the object (A) is not dried. 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 ℃)
It is an intermediate region between and, and particularly shows a temperature suitable for plant growth and the like.

Due to such a constitution, when the temperature control operation is stopped, the air flow rate control means (10) controls the air supply amount 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, it is possible to circulate the air in the room and prevent the temperature distribution in the room from becoming uneven. Moreover, since the amount of circulating air at this time is small, the surface of the object (A) will not be dried.

According to a second aspect of the present invention, in the air conditioner according to the first aspect, the supply amount of the conditioned air during the temperature control operation is always constant, while the drying suppression amount is the conditioned air during the temperature control operation. And about half of the supply. With this configuration, it is possible to obtain the air supply amount that is necessary to make the temperature distribution in the room uniform and that can suppress the drying of the surface of the object (A).

According to a third aspect of the present invention, in the air conditioner according to 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 a drying suppression amount. The switching means (TM) capable of switching between the dryness suppression mode (1) and the stop mode (0) is provided. With this configuration, it is possible to change the amount of air supplied from the air supply means when the temperature control operation is stopped, as needed. In other words, in situations where there is no concern that the temperature distribution inside the room (H) will become uneven or the surface of the object (A) will dry, setting to the stop mode will prevent unnecessary air flow and running. The cost can be reduced.

According to a fourth aspect of the invention, in the air conditioner according to the third aspect, the switching means (TM) is capable of switching between the drying suppression mode and the stop mode depending on the time zone. With this configuration, it is possible to specifically obtain the configuration for obtaining the operation according to the invention described in claim 3.

[0018]

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

FIG. 1 shows the inside of the house (H) according to this embodiment. Thus, in the house (H), there are shiitake mushrooms (A)
Multi-tiered shelves (1a, 1) where fungal beds (T, T,…) for cultivation are arranged
A cultivation rack (1) having a, ...) Is arranged.
Specifically, in this embodiment, six shelves (1a, 1a,
10 racks (1, 1, ...) with a house (H)
Are arranged side by side in two rows in the longitudinal direction.

And, in this house (H),
An air conditioner (2) is provided to cool the inside of the house (H) when the temperature inside the (H) becomes higher than the optimum temperature for the growth of the shiitake mushroom (A) as an object. There is. The air conditioner (2) will be described below.

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

The outdoor unit (3) is an outdoor casing (3a)
A compressor, a condenser, an outdoor fan, an accumulator, etc. (not shown) are housed inside, while the indoor unit (4) has an expansion valve, an evaporator, an indoor fan as an air supply means, etc. in the indoor casing (4a). Is housed. Further, the indoor casing (4a) is provided with an air inlet (not shown) on the lower surface thereof 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 the present embodiment) blowout 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.

When the air conditioner unit (2a) is in operation, the refrigerant gas, which has become high temperature and high pressure in the compressor when the compressor is driven, is condensed and liquefied in the condenser, and then the indoor unit (4)
The air is cooled by the expansion valve, the pressure is reduced by the expansion valve, the vapor is evaporated by the evaporator, and heat is exchanged with the air introduced into the indoor casing (4a) from the air suction port. Then, this cooled conditioned air is discharged from the outlet ducts (3b, 3b, ...) to the house.
(H) It is designed to be blown out inside.

The feature of this embodiment resides in the drive control of the indoor fan provided in the indoor unit (4). FIG. 2 shows a drive electric circuit of the indoor fan in this 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) equipped with an indoor fan relay switch (RY-FS) having a-contact. In addition, 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 the 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 Low speed rotation (about half of the above high speed rotation)
Drive to set a drying suppression amount that is smaller than the blown air amount of the H tap. In this way, the air volume control means (10) is configured.

Further, the power line (L) is switched depending on the deviation of the room temperature from the set temperature, and the temperature switch (TS) which is closed when the room temperature becomes higher than a predetermined range, and the compressor. The compressor circuit (a) which is connected in series with the relay coil (RY-CC) is connected. Also, this compressor circuit (a) is connected in parallel to the compressor relay coil (RY-CC) and switches the above tap change relay switch (RY-TS) to the tap change relay coil (RY-T).
C) is provided. And the tap change relay switch (RY-TS) is the tap change relay coil (RY-TS
It is switched to connect to the H tap line (LH) in the excited state of TC) and to the L tap line (LL) in the non-excited state.

The interlock switch (SS) for selecting whether or not to interlock the H tap and L tap of the fan motor (MF) with respect to the thermo on / off state and the timer relay (M) which will be described later are used 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). Then, the timer circuit (e) equipped with the timer relay (M) that switches between the excited state and the non-excited state by the timer (TM) that can be arbitrarily set ON / OFF switching according to the time zone ) Are connected in parallel.
The timer switch (TM-S) is closed when the timer relay (M) is energized when the timer (TM) is ON, and is open when the timer relay (M) is de-energized when the timer is OFF. Becomes For example, switch the timer (TM) to the ON state during the day (6 am to 6 pm) and to turn the timer (TM) off during the night (6 pm to 6 am). (TM-S) open / close switching can be set arbitrarily. In other words, the timer (TM) constitutes a switching means capable of switching between the drying suppression mode in which the air supply amount from the indoor fan is L taps and the stop mode in which the air supply amount is zero when the thermostat is turned off.

Further, the indoor fan relay switch (RY-
The fan circuit (c) equipped with the indoor fan relay coil (RY-FC) that switches FS) is the compressor circuit (a) and the interlocking circuit.
It is connected in parallel to (b). This fan circuit (c) is equipped with a fan interlock relay switch (RY-US) that can be switched by the fan interlock 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) that connects the indoor fan relay coil (RY-FC) to the power line (L). While switching the US), the fan interlock relay coil (R
In the de-energized state of (Y-UC), the indoor fan relay coil (RY-
Switch the fan interlocking relay switch (RY-US) to the second connection line (d2) side that has a compressor relay switch (RY-CS) that consists of a contact (FC), and then press 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 of.

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

Next, the operation for adjusting the internal environment of the house (H) constructed as described above will be described. In summer, the air conditioner (2) operates the boilers in winter, and in the middle of spring and autumn, the air conditioner (2) operates during the day and the boiler operates at night. House
The temperature in (H) is maintained in a temperature environment (for example, 15 ° C) suitable for the growth of shiitake mushroom (A). At the same time, by adjusting the operating conditions of the sprayer and the ventilation fan, the humidity inside the house (H) is suitable for the growth of shiitake mushrooms (A) (for example, a relative humidity of 80%).
%). In addition, opening and closing the blinds adjusts the sun rays introduced into the house (H).

The operation of each air conditioning unit (2a) of the air conditioner (2) will be described in detail. When the temperature inside the house (H) becomes higher than the set temperature, the thermostat is turned on and the compressor is driven. At the same time, the indoor fan is driven by the H tap having a relatively large air volume, so that 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 whose air volume is about half that of the H tap. The tap switching operation of this indoor fan will be described below with reference to the electric circuit of FIG.

The tap change operation of the indoor fan is performed when the interlock switch (SS) is closed and the timer (TM) is turned on. In other words, operate the interlock switch (SS) in the closed state, set the timer (TM) to ON, and switch the timer switch (TM-S) to the closed state when the timer relay (M) is excited. Be seen. In this state, the fan interlocking relay coil (RY-UC) is excited, and accordingly, the fan interlocking relay switch (RY-US) is connected to the first connection line (d1).

When the temperature inside the room rises above 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 is within a predetermined range, the temperature switch (TS) is opened and the compressor relay coil (R
Y-CC) and tap change relay coil (RY-TC) are both de-energized, the compressor relay switch (RY-TC)
(CS) is open and tap change relay switch
(RY-TS) connects to L tap line (LL). Therefore, 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 suction port is blown out as it is, and the duct (3
b, 3b,…) will blow into the house (H) with a relatively small amount of air.

In addition, the interlock switch (SS) is closed and the timer (TM) is off, and the interlock switch (S)
S) is open and the timer (TM) is ON,
Or the interlocking switch (SS) is opened and the timer (TM)
Is OFF, the fan interlock relay switch (RY-UC) is not energized and the fan interlock relay switch
(RY-US) is always connected to the second connecting line (d2). Therefore, the temperature switch accompanying the change in the temperature inside the house
Compressor relay switch (RY-CS) according to the opening / closing operation of (TS)
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 on the H tap line.
It is connected to (LH). Therefore, the conditioned air is supplied by the H tap when the thermo is turned on, while the air supply is stopped when the thermo is turned off.

As described above, in this embodiment, the indoor unit (4) blows out a relatively large amount of conditioned air when the thermostat is turned on, and blows out a small amount of air when the thermostat is turned off. Will function as a circulator that circulates the air in the house (H), and avoids the uneven temperature distribution in the house (H). Therefore, each shelf (1a, 1a,…)
The ambient temperature of the surroundings can be made approximately equal, and each shelf (1a,
The growth condition of shiitake mushrooms (A, A,…) cultivated in 1a,…) can be made uniform. In addition, since the air volume at the time of this thermo-off is relatively small, the water flow on the surface of the shiitake mushroom (A) deprives the water of the surface and the shiitake mushroom (A) dries, which adversely affects growth. Nor. Therefore, it is possible to stably secure the required growth condition and harvest amount.

In this embodiment, the house (H) for plant cultivation is used.
Although described as an example of those for shiitake cultivation, the present invention is not limited to this, it is also possible to apply to strawberries, cultivation house such as fresh flowers, or a warehouse for food storage or a food processing room. is there.

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

Further, in the present embodiment, the air conditioner (2) is a cooling-only machine, but it may be a heating-only machine or may be used for both heating and cooling. It may be set to.

[0040]

As described above, according to the present invention, the following effects can be obtained. According to the first aspect of the present invention, the temperature of the entire room when the temperature control operation is stopped for the air conditioner installed in the room in which the object that is required to be placed in the environment of high humidity and medium temperature is placed. Since the air volume 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 to suppress the drying of the object, even if the temperature control operation is stopped The air can be circulated and the temperature distribution in the room can be made uniform. Further, since the amount of circulating air at this time is small, the surface of the target object will not be dried. For this reason, when a plant or the like is applied as the object, the growth state can be made uniform and good throughout the room, and the required growth state and yield can be stably secured.

According to the second aspect of the present invention, the drying suppression amount is about half of the supply amount of the conditioned air during the temperature control operation, which is necessary for making the temperature distribution in the room uniform and It is possible to obtain an air supply amount that can suppress the drying of the surface of the object.

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

According to the invention described in claim 4, since the drying suppression mode and the stop mode can be switched depending on the time zone, the configuration for obtaining the effect according to the invention described in claim 3 is concretely described. Therefore, the practicality of the air conditioner can be further improved.

[Brief description of drawings]

FIG. 1 is a view showing the inside of a shiitake cultivation house.

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

FIG. 3 is a view 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)

[Claims] 1. A room is installed in a room (H) in which an object (A) that is required to be placed in a high humidity and medium temperature range is placed, and when the room temperature is outside a predetermined range, temperature control operation is performed In the air conditioner that stops the temperature control operation when the temperature is within the range, the air supply means in which the air supply amount to the room (H) is variable, and the conditioned air from the air supply means during the temperature control operation The amount of air supplied from the air supply means is set so that the temperature distribution in the entire room (H) is made uniform and the drying of the object (A) is suppressed when the temperature control operation is stopped, while the supply amount is set to a predetermined amount. Air volume control means (10) for changing to a drying suppression amount smaller than the above predetermined amount
An air conditioner characterized by being provided with. 2. The supply amount of the conditioned air during the temperature control operation is always constant, while the drying suppression amount is about half the supply amount of the conditioned air during the temperature control operation.
The air conditioner according to any one of the preceding claims. 3. The air supply amount from the air supply device set by the air flow control device (10) when the temperature control operation is stopped is switched between a drying suppression mode in which a drying suppression amount is set and a stop mode in which the air supply amount is set to zero. An air conditioner according to claim 1, characterized in that it is provided with a possible switching means (TM). 4. The air conditioner according to claim 3, wherein the switching means (TM) is capable of switching between the drying suppression mode and the stop mode depending on a time period.