JPH0733918B2 - Outside air treatment device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an outside air treatment device provided in an air conditioner for introducing outside air, performing dust removal, heat treatment, heat recovery, humidification, and the like.

[Conventional technology]

A direct expansion multi-type air conditioner, which is known as a type of air conditioner, is for performing cooling and heating by connecting one outdoor unit and a plurality of indoor units with a refrigerant pipe. Is connected to a ceiling-embedded type outside air treatment device that performs introduction of outside air, dust removal, heat treatment, heat recovery, humidification, and the like.

FIG. 3 is a schematic configuration diagram of a conventional direct expansion multi-type air conditioner, and FIG. 4 is an external view of the same outside air treatment device.
In the figure, for example, an outdoor unit 2 having a compressor, a four-way valve, a condenser, a refrigerant control circuit, etc. is provided on the roof or tower of the building 1, and an evaporator and A plurality of indoor units 3 having a throttle device and the like are provided, and the outdoor unit 2 and each indoor unit 3 are connected by a refrigerant pipe 4. Further, an outdoor air processing device 5 which is shown in detail in FIG. 4 is also connected to the outdoor unit 2 by the refrigerant pipe 4 and is provided inside the ceiling of the room. The outdoor air treatment device 5 includes an outdoor air suction port 6 that opens to the outside of the room,
The outdoor air suction port 6 communicates with a high-performance filter 7 that removes dust and the like contained in the outdoor air. At a position adjacent to the total heat exchanger 8 provided following the filter 7,
A blower 9a that sucks in outdoor air and discharges it indoors is provided so as to be connected to the filter 7 by an intake passage A that passes through the total heat exchanger 8, and a throttle mechanism is provided on the downstream side of the blower 9a. As described above, an evaporator / condenser 10 having the refrigerant pipe 4 connected to the outdoor unit 2 by the refrigerant pipe 4 and a humidifier 11 for humidifying the air passing through the condenser 10 during heating are provided. 12 is an outdoor air outlet that discharges the treated air indoors,
Reference numeral 13 is an indoor air intake provided adjacent to the outdoor air outlet 12. A medium performance filter 14 provided adjacent to the blower 9a for removing dust and the like in the air sucked from the indoor air suction port 13, and a blower provided adjacent to the filter 7 for sucking indoor air and discharging the air to the outside 9b is connected to an exhaust passage B passing through the total heat exchanger 8, and an indoor air outlet 15 communicating with the blower 9b is opened adjacent to the outdoor air inlet 6. The total heat exchanger 8 is configured to exchange heat between the air flowing through the intake passage A and the air flowing through the exhaust passage B.

The outdoor air outlet of the outdoor air treatment device 5 configured as described above
A branch duct 16a is branched from an intake duct 16 connected to 12, and the branch duct 16a is connected to each indoor unit 3. Further, the return air duct 17 connected to the indoor air suction port 13 of the outdoor air treatment device 5 is connected to the indoor air suction box 18, and the outdoor air suction port 6 of the outdoor air treatment device 5 and the indoor air outlet port. 15 is communicated with the outside air by an intake duct 20 and an exhaust duct 21 that penetrate the outer wall 19. 22 is a ceiling plate.

With such a configuration, when the blowers 9a, 9b rotate, the outside air is sucked into the outside air treatment device 5 through the outdoor air suction port 6, removed by the high-performance filter 7, and flows into the total heat exchanger 8. . On the other hand, the indoor air is sucked from the indoor air suction box 18, passes through the return air duct 17, and is sucked from the indoor air suction port 13 to the outside air treatment device 5. The air is dedusted by the medium performance filter 14 and flows into the total heat exchanger 8, where the outdoor air and the indoor air are heat-exchanged, and the indoor air is blown by the blower 9b into the indoor air outlet 15 and the exhaust duct 20. It is discharged to the outside of the outer wall 21 through. Further, the outdoor air is cooled (heated in the case of heating) by the evaporator (condenser in the case of heating) 10 by the blower 9a, and the outdoor air outlet 12 and the air supply duct.
It is discharged to the primary side of the evaporator (condenser in the case of heating) of the indoor unit 3 through 16 and the branch duct 16a. During heating, air humidified by the humidifier 11 is released. on the other hand,
The indoor unit 3 also performs the dust removal operation of the indoor air by the built-in high-performance filter 7 at the same time as the cooling or heating operation, and the outside air treated by the outside air treatment device is also discharged into the room from the outlet of the indoor unit 3 at the same time. Total air conditioning.

[Problems to be Solved by the Invention]

As described above, the direct expansion multi-type air conditioner is capable of total air conditioning by the combination of the outside air treatment device 5 and the indoor unit 3, but in the conventional outside air treatment device, the humidifier 11 is an ultrasonic type, There is a problem at the present when shifting to the natural evaporation type where there is no generation of chlorine. That is, the humidification amount of the natural evaporation type humidifier is highly dependent on the air temperature at the humidifier inlet, the outlet temperature of the heat exchanger rises as the outside air temperature rises, and in particular, the direct expansion type humidifier In this case, the capacity of the condenser also increases in proportion to the increase in the outside air temperature, and the air temperature at the condenser outlet, that is, the air temperature at the humidifier inlet rises. As a result, there is a problem that the humidification amount is increased and the inside of the air-conditioned room is excessively humidified, so that the humidification control cannot be performed.

The present invention has been made in view of the above points, and it is an object of the present invention to provide an outside air treatment device capable of controlling the amount of humidification of a natural evaporation type humidifier.

[Means for Solving the Problems]

In order to solve such a problem, in the present invention, the rotation of the blower blows the air from the outdoor air suction port, and the outdoor air is sucked from the outdoor air outlet through the total heat exchanger, the evaporator / condenser, and the humidifier. In the outdoor air processing device, the indoor air suction port is rotated so as to exchange heat with the indoor air which is sucked from the indoor air suction port through the total heat exchanger and is sucked from the indoor air outlet port by the total heat exchanger. A humidity detecting element near the mouth for detecting indoor humidity, a valve connected to the evaporator / condenser to control the flow rate of the heat medium, and an operation electrically connected to the valve to determine the opening degree of the valve. A humidification amount control device including an element was provided.

[Action]

When the blower rotates, the outdoor air is sucked into the outdoor air treatment device through the outdoor air suction port, is discharged from the outdoor air outlet through the total heat exchanger, the evaporator / condenser, and the humidifier. on the other hand,
When another blower rotates, the indoor air sucked from the indoor air suction port is discharged from the indoor air outlet through the total heat exchanger. In this case, the outdoor air and the indoor air exchange heat with each other when passing through the total heat exchanger.

During heating operation, the outside air is humidified as it passes through the natural evaporation type humidifier.If the temperature of the outside air rises at this time, the outlet temperature of the total heat exchanger also rises and the heating capacity of the condenser also increases. Since it rises, the temperature of the air supplied to the humidifier also rises. Due to this temperature rise, when the humidity exceeds the indoor set humidity, the humidity detecting element detects it and determines the opening degree of the refrigerant amount control valve by the arithmetic element and throttles it. Also, when the temperature of the air supplied to the humidifier is less than the indoor set humidity, the opening of the refrigerant amount control valve increases, increasing the refrigerant flow rate and increasing the capacity of the condenser. Raise the temperature to increase the amount of humidification. That is, even if the outside air temperature changes, insufficient humidification or excessive humidification does not occur.

〔Example〕

1 and 2 are symbols (a), (b) and (c) showing an embodiment of the outside air treatment apparatus according to the present invention. Fig. 1 is an external view thereof, and Fig. 2 (a) is outside air. Fig. 2 (b) shows the relationship between the dry-bulb temperature and the heating capacity of the heat exchanger, Fig. 2 (b) shows the relationship between the dry-bulb temperature of outdoor air and the amount of humidification, and Fig. 2 (c) shows the dryness of outdoor air. It is a relational diagram of a sphere temperature and indoor relative temperature. The configuration of the entire air conditioner is the same as that of the conventional one shown in FIG. 3, and therefore the description will be given using this figure. For example, an outdoor unit 2 having a compressor, a four-way valve, a condenser, a refrigerant control circuit, and the like is provided outside the building 1, and an evaporator, a throttle device, and the like are provided inside the indoor ceiling of the building 1. A plurality of indoor units 3 are provided,
The outdoor unit 2 and each indoor unit 3 are connected by a refrigerant pipe 4. Furthermore, the outside air treatment device 5 shown in detail in FIG.
Is also connected to the outdoor unit 2 by the refrigerant pipe 4 and is provided behind the ceiling in the room. The outdoor air treatment device 5 includes an outdoor air suction port 6 that opens to the outside of the room, and the outdoor air suction port 6 is connected to a high-performance filter 7 that removes dust and the like contained in the outdoor air. At a position adjacent to the total heat exchanger 8 provided subsequent to the filter 7, a blower 9a that sucks outdoor air and discharges it into the room is provided between the filter 7 and the intake passage A passing through the total heat exchanger 8. The evaporator / condenser 10 is connected and provided on the downstream side of the blower 9a and has the throttle mechanism 10a connected to the outdoor unit 2 through the refrigerant pipe 4 as described above, and the condenser 10 during heating. A natural evaporation type humidifier 11 for humidifying the air heated by is provided. 12
Is an outdoor air outlet for discharging the treated air into the room, and 13 is an indoor air inlet provided adjacent to the outdoor air outlet 12.

A medium performance filter 14 which is provided adjacent to the blower 9a and removes dust and the like in the air sucked from the indoor air suction port 13,
The blower 9b that is provided adjacent to the filter 7 and that sucks indoor air and discharges the air to the outside is connected by the exhaust passage B that passes through the total heat exchanger 8, and the indoor air outlet 15 that communicates with the blower 9b is An opening is formed adjacent to the outdoor air blowing port 6. The total heat exchanger 8 is configured to exchange heat between the air flowing through the intake passage A and the air flowing through the exhaust passage B.

The outdoor air outlet of the outdoor air treatment device 5 configured as described above
A branch duct 16a is branched from an intake duct 16 connected to 12, and the branch duct 16a is connected to each indoor unit 3. Further, the return air duct 17 connected to the indoor air suction port 13 of the outdoor air treatment device 5 is connected to the indoor air suction box 18, and the outdoor air suction port 6 of the outdoor air treatment device 5 and the indoor air outlet port. 15 is communicated with the outside air by an intake duct 20 and an exhaust duct 21 that penetrate the outer wall 19. 22 is a ceiling plate.

In the vicinity of the indoor air suction port 13, a humidity detecting element 23 for detecting the humidity of the indoor air sucked from the indoor air suction port 13
However, in close proximity thereto, it is provided by being electrically connected to the arithmetic element 24 fixed to the outer wall of the outside air processing device 5. Further, the refrigerant pipe connected to the evaporator / condenser 10 is provided with a refrigerant flow control valve 25 whose opening is determined by a signal from the arithmetic element 24.

The operation of the outside air treatment device configured as described above will be described. When the blowers 9a and 9b rotate during the cooling operation, the outside air is sucked into the outside air treatment device 5 through the outdoor air suction port 6, removed by the high performance filter 7, and flows into the total heat exchanger 8. On the other hand, indoor air is sucked in from the indoor air suction box 18,
It is sucked into the outside air treatment device 5 through the return air duct 17 and the indoor air suction port 13. The air is dedusted by the medium performance filter 14 and flows into the total heat exchanger 8, where the outdoor air and the indoor air are heat-exchanged, and the indoor air is blown by the blower 9b into the indoor air outlet 15 and the exhaust duct 20. It is discharged to the outside of the outer wall 21 through. The outdoor air is cooled in the evaporator 10 by the blower 9a and is discharged to the primary side of the evaporator of the indoor unit 3 through the outdoor air outlet 12, the intake duct 16 and the branch duct 16a.

Next, during the heating operation, the air flow inside and outside the room is the same as during the above-mentioned cooling, but by switching the four-way valve (not shown), the evaporator / condenser 10 acts as a condenser, and the warm air is of the natural evaporation type. The air in the outside air is humidified by passing through the humidifier. At this time, when the outdoor temperature rises, the outlet temperature of the total heat exchanger 8 rises and the heating capacity of the condenser 10 also rises, so the temperature of the air supplied to the humidifier 11 also rises. At this time, in the conventional device, the amount of humidification increases and the indoor relative humidity rises, resulting in excessive humidification. However, in the present invention, the humidity detecting element 23 is provided in the vicinity of the indoor air suction port 13 of the outside air processing device 5. Therefore, when the temperature of the air passing through the condenser 10 becomes equal to or lower than the indoor set humidity, the opening degree of the refrigerant amount control valve 25 provided at the refrigerant pipe inlet of the condenser 10 is determined by the arithmetic element 24. The opening is narrowed. Further, when the humidity of the air passing through the condenser 10 becomes equal to or lower than the indoor set humidity, the opening degree of the refrigerant amount control valve 25 increases to the opening degree determined by the arithmetic element 24, so that the flow rate of the refrigerant is As the number increases, the capacity of the condenser 10 increases, the inlet temperature of the humidifier 11 increases, and the amount of humidification increases. In this way, the indoor relative temperature can be kept constant regardless of the temperature change of the outside air.

Fig. 2 (a) is a relationship diagram between outdoor air dry bulb temperature and heat exchanger heating capacity, Fig. 2 (b) is a relationship diagram between outdoor air dry bulb temperature and humidification amount, and Fig. 2 (c). ) Is a relationship diagram between the outdoor air dry bulb temperature and the indoor relative temperature. In these figures, the dotted line shows the relationship diagram in the conventional outside air treatment device, and the solid line shows the relationship diagram in the outside air treatment device according to the present invention. As is apparent from the figure, conventionally, the heating capacity, the humidification amount, and the indoor relative temperature of the heat exchanger change according to the change of the outdoor air temperature, whereas the outdoor air treatment device according to the present invention maintains these constant values. It shows that you do.

In addition, in the present embodiment, an example in which the present invention is applied to the direct expansion type air conditioner is shown, but the present invention can be applied to a water type air conditioner as well, and the same operational effect is obtained. In this case, a water amount control valve may be provided at the inlet of the heat exchanger.

〔The invention's effect〕

As is clear from the above description, according to the present invention, the rotation of the blower sucks the air from the outdoor air suction port to evaporate the total heat exchanger. The outdoor air that is sucked from the outdoor air outlet via the condenser and the humidifier, and the indoor air that is sucked from the indoor air inlet by the rotation of the blower and is sucked from the indoor air outlet through the total heat exchanger are the total heat. In an outside air treatment device configured to exchange heat with an exchanger, a humidity detecting element for detecting indoor humidity in the vicinity of the indoor air suction port, and a heat medium flow rate connected to the outside air heat exchanger. Even if the temperature of the outside air changes, the data of the indoor humidity detection element can be obtained by providing a humidification amount control device consisting of a valve that controls the temperature and a calculation element that is electrically connected to this valve and determines the opening degree of this valve. The calculation element determines the opening of the refrigerant flow control valve based on the above, and the flow rate of the refrigerant is controlled to control the humidity of the air flowing into the natural evaporative humidifier so that it becomes the indoor set humidity. It is possible to control the amount of humidification, not the conventional humidification shortage or humidification excessive as, greater the effect obtained comfortable humidification.

[Brief description of drawings]

1 and 2 (a), (b), (c) show an embodiment of an outside air treatment apparatus according to the present invention, and FIG. 1 is its outline drawing, FIG.
(a) is a relationship diagram between the dry-bulb temperature of the outdoor air and the heating capacity of the heat exchanger, FIG. 2 (b) is a relationship diagram between the dry-bulb temperature of the outdoor air and the humidification amount, and FIG. 2 (c). ) Is a relational diagram between the dry-bulb temperature of the outdoor air and the indoor relative temperature, FIG. 3 is a schematic configuration diagram of a conventional air conditioner, and FIG. 4 is an external view of the outdoor air treatment device. 5 ... Outdoor air treatment device, 6 ... Outdoor air suction port, 8 ... Total heat exchanger, 9a, 9b ... Blower, 10 ... Evaporation / condenser, 11
…… Humidifier, 12 …… Outdoor air outlet, 13 …… Indoor air inlet, 15 …… Indoor air outlet, 23 …… Humidity detection element, 24
...... Calculation element, 25 …… Refrigerant flow control valve.

Claims (1)

[Claims] 1. The outdoor air sucked from the outdoor air suction port by the rotation of the blower, the outdoor air blown from the outdoor air blower via the total heat exchanger, the evaporator / condenser and the humidifier, and the indoor air suction port by the rotation of the blower. The indoor air blown from the indoor air outlet via the total heat exchanger, in the outside air processing device configured to exchange heat with the total heat exchanger, the indoor humidity in the vicinity of the indoor air suction port A humidification amount control device comprising a humidity detecting element for detecting the temperature, a valve connected to the evaporator / condenser to control the flow rate of the heat medium, and an arithmetic element electrically connected to the valve to determine the opening of the valve. An outside air treatment device comprising: