JPH01291025A - Air conditioner - Google Patents

Abstract

PURPOSE:To remarkably increase the load capacity of a secondary air conditioner by making it possible to feed air from a primary air conditioner through an opening and closing valve at the circulating air inlet port of the secondary air conditioner and by directly blowing the air fed by the primary air conditioner and by directly blowing the air fed by the primary air conditioner to an interior zone and a perimeter zone in a room through the secondary air conditioner. CONSTITUTION:When uniform cooling and heating is carried out in an indoor zone (perimeter zone) susceptible to influence from the outside and in an indoor zone (interior zone) hardly susceptible to influence from the outside, a valve 25 is closed, a valve 24 is, if necessary, opened and a valve 26 is opened to blow air into a room, so that uniformly air-conditioned air is supplied within the room 2. Then, in the case where the interior zone is cooled and the perimeter zone is heated at the same time, the valve 25 is opened and the valves 24 and 26 are closed to feed a primary feed air at a low temperature directly into the interior zone while feeding the indoor circuiting air and the hot air past a heat exchanger into the perimeter zone, whereby the cooling and heating are simultaneously carried out. When a secondary air conditioner 4 and an insufficient capacity, air fed by a primary air conditioner 5 is incorporated with the air from the secondary air conditioner 4 by the adjustment of opening and closing the valve 24 to increase the capacity that much, thereby enabling the secondary air conditioner 4 to be operated even at a high load.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to an air conditioner.

[Conventional technology]

Conventionally, as an air conditioning system, air conditioning is performed using a primary air conditioner that takes in outside air and performs air conditioning.
Various systems are known in which the air from the primary air conditioner is further conditioned by a secondary air conditioner to suit the conditions of each room, thereby maintaining the comfort of each room (for example, Tokyo Denki University Press Station series “Basics and practice of air conditioning (Part 1)” No. 17
0-171).

[Problems with conventional technology]

However, in the above system, air conditioning in each room is solely dependent on the air supply capacity of the secondary air conditioner, so if the cooling or heating load increases significantly, capacity may be insufficient and sufficient air conditioning may not be possible. There was a problem.

Furthermore, depending on the location of the room where air conditioning is performed, there are many cases in which the air conditioning or heating requirements for the air conditioning zone and the interior zone differ even within the same room.Especially in winter, the air conditioning zone requires heating and the interior zone requires cooling. It may be a request.

In such cases, in combination with the fact that conventional air conditioning systems rely exclusively on secondary air conditioners for indoor air conditioning, there is a problem in that they are unable to adequately respond to the air conditioning demands of each indoor zone. Ta.

However, this problem can be solved by increasing the capacity of the secondary air conditioner, but these air conditioning equipment must be made extremely large together with the primary air conditioner, resulting in various disadvantages such as space and operating costs. .

[Problems solved by the invention]

In view of the above-mentioned problems, the present invention aims to provide an air conditioner that can fully meet the demands of the perimeter zone and the interior zone, and that can significantly increase the load capacity even though it is the same device as before. It has been done.

[Technology for Solving Problem C] That is, the air conditioner of the present invention has a zone within the room that is easily influenced by the outside world (hereinafter referred to as the "perimeter zone") and a zone that is less influenced by the outside world (hereinafter referred to as the "interior zone"). ), a secondary air conditioner for each zone,
A circulating air path is formed with the air supply ducts arranged in each of the zones, and the interior zone air supply duct has a bypass that directly sends the air from the primary air conditioner having an outside air intake. On the other hand, the secondary air conditioner is provided with a mixing circuit for mixing the primary air of the primary air conditioner and return air from the room via a regulating valve, and the 2. In the above invention, the primary air conditioner is characterized in that the outside air intake port is connected to a return air supply path from the room via a switching valve.
At the circulating air inlet of the secondary air conditioner, air from the primary air conditioner can be supplied via an on-off valve, and from the primary air conditioner to the interior zone and perimeter zone via the secondary air conditioner. The air supply system is characterized in that the air can be sent directly.

〔Example〕

Next, the present invention will be explained with reference to examples.

FIG. 1 is a system diagram of an embodiment of this invention, and FIGS. 2 and 3 are conceptual diagrams of a secondary air conditioner used in an embodiment of this invention.

The air conditioner l of the present invention has air supply ducts 3 connected to a perimeter zone 2A and an interior zone 2B in a room 2, respectively.
A, 3B are arranged, and a circulating air path is formed by these air supply ducts 3A, 3B and a secondary air conditioner 4 for the perimeter zone and interior zone, and an outside air intake 5.
The primary air conditioner 5 having A is configured to be able to supply air to the secondary air conditioner 814, and the secondary air conditioner 4 sends air directly from the primary air conditioner to the interior zone air supply duct 3B. A mixing circuit 20 for mixing primary air from the primary air conditioner 5 and circulating air from inside the room 2 is provided via a regulating valve 24 (see FIG. 2). 3), and a return air supply path 7 from inside the room 2 is connected to the outside air intake port 5A of the primary air conditioner 5 via a switching valve 51.

FIGS. 2 and 3 show an example of the secondary air conditioner 4 used in the above embodiment, with FIG. 2 showing a floor-standing type and FIG. 3 showing a ceiling-suspended type.

In FIGS. 2 and 3, the secondary air conditioner 4 includes a primary air supply port A, an indoor circulation air port B, an interior zone air supply hole C, and a perimeter zone air supply port from the primary air conditioner 5. A bypass 6 is provided between the primary air supply port A and the interior zone air supply port C via a valve 25, and a bypass 6 is provided between the primary air supply port A and the circulating air port B via a valve 24. The mixing path 20 passes through an air filter 23, a heat exchanger 22, a supply air fan 21, a perimeter zone air inlet and a valve 26, and then connects to an interior zone air inlet C. is connected and configured.

In addition, 27 in the figure is a heat medium pipe provided in the heat exchanger 22.

In the above embodiment, an opening/closing mechanism is provided at the circulating air inlet of the secondary air conditioner 4 as shown in FIG. 4 so that the circulating air from the room 2 can be mixed or replaced with the primary air from the primary air conditioner 5. A configuration in which a valve 28 is provided is also possible. (Second
(Indicated by chain lines in FIG. 3) [Function] Next, the present invention will be explained in detail.

To uniformly cool or heat the room in both the interior and perimeter zones, close the valve 25, open the valve 24 as necessary, and open the valve 26 to supply air into the room. Uniform conditioned air is supplied to both the interior and perimeter zones within the room 2.

Next, when cooling the interior zone and heating the perimeter zone, open the valve 25, close the valves 24 and 26,
Low-temperature primary supply air is directly supplied to the interior zone, and heating air is supplied to the perimeter zone via indoor circulating air and a heat exchanger 22.

This allows the interior zone to be cooled and the perimeter zone to be heated.

In addition, if the cooling or heating load is high and the capacity of the secondary air conditioner is insufficient, the air supply from the primary air conditioner is
By adjusting the opening and closing of the air conditioner and mixing the supply air from both harmonizers, the capacity will increase accordingly, making it possible to operate satisfactorily even under high loads.

In addition, in the case of the embodiment shown in FIG. 4, if the on-off valve 28 is opened, the effect is exactly the same as described above, but if the valve 28 is closed, even if the operation of the secondary air conditioner is stopped, the primary air Air conditioning is possible using only the conditioner 5.

Incidentally, Table 1 shows the air flow rate as 111 per hour when operating under the following conditions (1) to (2). Note that Φ to ■ represent the embodiment shown in FIG. 1, and ■ to ■ represent the embodiment shown in FIG. 4 with the valve 28 closed.

Conditions■ The minimum amount of outside air during normal cooling (heating) is processed by the primary air conditioner 5, and the secondary air conditioner 4 processes this primary air together with the circulating air from inside the room 2. A predetermined amount of air is sent to the zone, and the minimum amount of air is sent to the perimeter zone.

(Valve 25 closes, valve 24 opens halfway, valve 26 opens) ■ When cooling with outside air When cooling is required inside the room and the outside air temperature (enthalpy, to be exact) is low, and when cooling with outside air, the maximum amount of outside air is set in the primary air conditioner 5. A predetermined amount of air is sent directly to the interior zone via bypass 6,
The primary air and the circulating air from inside the room 2 are processed together in the perimeter zone, and the maximum air volume is sent to the perimeter zone.

(Valve 25 midway, valve 24 open, valve 26 closed) ■ During normal cooling under high load, increase the return air from inside room 2, and adjust the minimum amount of outside air and the amount of return air from room 2 to the primary air conditioner. Treat and blow air through the same route as in ■.

(midway of valve 25, halfway close to valve 24 closed, valve 26 closed)■
When the interior zone requires cooling and the perimeter zone requires heating, an intermediate amount of outside air is processed by the primary air conditioner and blown through the same route as in ■.

(Valve 25 opens, valve 24 closes halfway, valve 26 closes) ■During warming-up When heating and cooling starts, the primary air conditioner sends air as total return air through the same route as in ■.

■Outdoor air cooling or ventilation The maximum amount of outside air is processed by the primary air conditioner and sent to the interior zone and perimeter zone.

(Valve 25 open, valve 24 closed, valve 26 open, valve 28 closed) ■ The minimum amount of outside air and the amount of return air from room 2 are processed by primary air conditioning, and the air is blown through the same route as in ■.

(continued on next page) Table 1 Unit: m/hr * Indicates the air volume processed by the primary air conditioner.

** Indicates the amount of return air from room 2.

〔effect〕

As explained above, this invention makes it possible to cool the interior zone with outside air even if the load conditions in the same room are different, such as when the interior zone requires cooling and the perimeter zone requires heating, allowing for more detailed air conditioning. Moreover, energy saving can be realized.

In addition, the primary air can be supplied to the secondary air conditioner by bypassing or mixing it, so as shown in Table 1,
As shown in (1) and (2), the air flow rate of only the secondary air conditioner is 3600113/hr, which makes it possible to blow a large amount of air.

In addition, the primary air conditioner and secondary air conditioner can be separated by valve operation, making it possible to continue air conditioning even if one of the air conditioners is stopped due to a malfunction or failure, etc. have an effect.

Furthermore, since the secondary air conditioners for the interior zone and perimeter zone can be made compact as shown in FIGS. 2 and 3, various effects such as the ability to downsize the device are achieved.

[Brief explanation of the drawing]

Fig. 1 is a system diagram of an embodiment of this invention, Figs. 2 and 3 are conceptual diagrams of a secondary air conditioner used in an embodiment of this invention, and Fig. 4 is a system diagram of another embodiment. It is a diagram. γ2x

Claims (2)

[Claims] (1) Zones within the room that are susceptible to external influences (hereinafter referred to as “
Circulation is carried out between the "perimeter zone") and the zone with little influence from the outside world (hereinafter "interior zone"), the secondary air conditioners for each zone, and the air supply ducts installed in each zone. An air path is formed, and the interior zone air supply duct further has an outside air intake port.
A bypass is provided via an on-off valve to directly send air from the secondary air conditioner, and on the other hand, the secondary air conditioner mixes the primary air of the primary air conditioner with return air from the room. An air conditioner characterized in that a mixing circuit is provided via a regulating valve, and further, a return air supply path from the room is connected to an outside air intake port of the primary air conditioner via a switching valve. Device. (2) Air from the primary air conditioner can be supplied to the circulating air inlet of the secondary air conditioner via an on-off valve;
2. The air conditioner according to claim 1, wherein air from the primary air conditioner can be directly sent to the interior zone and the perimeter zone via the secondary air conditioner.