JPH04208354A - Ceiling-mounting type air conditioner - Google Patents

Abstract

PURPOSE:To achieve the substantially same performance as in the case two fans are respectively provided on two air flow paths, by providing an axial-flow fan whose first and second impellers are arranged at different positions corresponding to main and ancillary air flow paths, and an influent controller which controls the influent air to the ancillary air flow path. CONSTITUTION:There are two air flow paths, a main air flow path 3A and an ancillary air flow path 3B, and an opening 22 is opened when necessary to communicate the main air flow path 3A to the ancillary air flow path 3B. A portion of conditioned air, that heat-exchanged at a heat exchanger 6, is controlled at a specified flow rate by an influent controller, introduced into the ancillary air flow path 3B, mixed with non-heat-exchanged air, and blown out form a second air outlet 8B. On the other hand, main conditioned air after heat-exchanged at the heat exchanger 6 is blown out from a first air outlet 8A by a first impeller 4A of an axial-flow fan 4. As a result, non-heat-exchanged air of the room temperature level, that is introduced from an ancillary suction port 2B to the ancillary air flow duct 3B, is added to the main conditioned air via the opening 22.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to the structure of a ceiling-mounted air conditioner that has a temperature control function for draft or cold air using room temperature air.

(Prior Art) For example, in an air conditioner that employs a warm air blowing method that controls the temperature of hot air using air at about room temperature, an independent blower is conventionally used, as shown in, for example, Japanese Patent Application Laid-Open No. 1-T 67539. Two (fans) are used, one on the blade side is installed in the main ventilation path with the heat exchanger, and one on the other side is installed in the open ventilation path that bypasses the main ventilation path. In some cases, air blowers are designed to adjust the volume of warm air during dehumidification by merging them at an appropriate position near the air outlet. Even in one unit, by partitioning the main flow path as described above with a partition plate from the middle, the main flow path and the sub flow path are made into two completely branched paths, and they are merged downstream of the outlet. Things exist.

(Problems to be Solved by the Invention) However, in the case where the above-mentioned two blowers are used and installed in separate passages, there is a problem that the size of the indoor unit becomes significantly large.

On the other hand, even if there is only one blower, if two sets of independent air channels are installed, it will still require a large amount of space, which goes against the demands for space saving. There is a problem that the presence of the partition plate increases the resistance inside the machine.

(Means for Solving the Problems) The inventions recited in claims 1 to 3 of the present application are each made for the purpose of solving the above-mentioned problems, and are each configured as follows.

(1) Structure of the invention as claimed in claim 1 The ceiling-mounted air conditioner of the invention as claimed in claim 1 is a ceiling-mounted air conditioner as shown in FIGS. 1 to 4, for example. A casing 1, two main and auxiliary air suction ports 2A and 2B that are vertically divided and provided on the outer circumference of the casing 1, and a main and sub-air inlet 2A and 2B that are provided on the outer periphery of the casing 1, and a lower surface of the air conditioner casing 1 that extends from the center toward the outer periphery. First and second air outlets 8A and 8B provided at different positions, and a main air flow path 3A formed from the downstream side of the main air intake port 2A to the first air outlet 8A. , a heat exchanger 6 disposed on the main air suction port 2A side of the main air passage 3A, and a heat exchanger 6 disposed on the main air suction port 2A side of the main air passage 3A, and a heat exchanger 6 disposed on the downstream side of the two main and sub air passages 3A and 3B, and the first and second Located upstream of the air outlets 8A and 8B,
An axial fan 4 in which first and second blades at different positions in the radial direction are arranged to correspond to the two main and sub air flow paths 3A and 3B, and an upstream part of the axial fan 4. The present invention is characterized by comprising an inflow control means for controlling the inflow of circulating air from the main air flow path 3A into the auxiliary air flow path 3B side.

(2) i1! Structure of the invention according to claim 2 The ceiling-mounted air conditioner according to the invention according to claim 2 has the following features: - For example, FIG.
As shown in FIG. 4, the structure of the ceiling-mounted air conditioner according to the invention set forth in claim 1 is used as a basic structure, and the inflow control means in the basic structure controls the main air flow path 3A to The opening 22 communicates with the flow path 3B side.
a first damper 21 whose opening degree can be arbitrarily adjusted;
It is characterized in that it is configured by providing.

(3) Structure of the invention recited in claim 3 The ceiling-mounted air conditioner of the invention recited in claim 3 has the structure of the invention recited in claim 1, as shown in FIGS.
The ceiling-mounted air conditioner of the invention described above has a basic configuration, and the main air inlet 2A and the sub air inlet 2B in the basic configuration.
A second damper 1o is provided between the upstream portions of the suction ports 2A and 2B to arbitrarily variably adjust the relative opening of the two suction ports 2A and 2B.

(Function) As a result of each of the inventions recited in claims 1 to 3 of the present application being configured as described above, each invention exhibits the following effects based on the configuration.

(1) Effect of the invention claimed in claim 1 In the structure of the ceiling-mounted air conditioner according to the invention claimed in claim 1, as described above, the ceiling-mounted air conditioner casing 1
, two main and auxiliary air suction ports 2A and 2B that are vertically divided and provided on the outer circumference of the casing 1; First and second air outlets 8A and 8B provided differently; a main air flow path 3A formed from the downstream side of the main air intake port 2A to the first air outlet 8A; A heat exchanger 6 disposed on the main air suction port 2A side of the main air flow path 3A, and the two main and sub air flow paths 3.
The first and second blades, which are located downstream of A and 3B and upstream of the first and second air outlets 8A and 8B, and whose positions are different in the radial direction, are connected to the main and sub 2 blades. An axial fan 4 disposed corresponding to the two air flow paths 3A and 3B, and the auxiliary air flow path 3B for circulating air flowing through the main air flow path 3A at the upstream portion of the axial fan 4. and an inflow control means for controlling the inflow state to the side,
For example, from the second air outlet 8B, the main air that has been sucked in from the main air suction port 2A and heat-exchanged via the heat exchanger 6 is mixed with the air sucked from the auxiliary air suction port 2B. The air on the flow path 3A side is mixed, thereby blowing out temperature-controlled air.

That is, in this configuration, since the blower is a single axial fan 4, there are two main and sub air flow paths 3A.

The first and second two blades 4A corresponding to 3B.

4B, and the first and second air outlets 8A respectively correspond to the air of the two main and sub air flow paths 3A and 3B,
8 Can be blown into the room through B. Therefore,
Substantially the same effect as when two blowers are installed in each of the flow paths 3A and 3B can be achieved without any particular increase in internal resistance.

On the other hand, the two main and sub-air channels 3A and 3B are formed by dividing the air conditioner main body casing 1 into upper and lower parts, and can be formed sufficiently if the normal casing height is provided. be able to.

The main and sub-two air flow paths 3A and 3B are located at the upstream side of the first and second blades 4A and 4B of the axial flow fan 4, which is downstream of the heat exchanger 6, for example, as a main air flow path. Since an opening 22 communicating from 3A to the auxiliary air flow path 3B side is formed as necessary, by doing so, the heat exchanger 6 can exchange heat on the auxiliary air flow path 3B side. A predetermined amount of temperature-controlled air controlled by the inflow control means flows in, is mixed, and is blown out from the second air outlet 8B.

As a result, the conditioned air blown into the room is transferred to the heat exchanger 6.
The heat-exchanged main conditioned air blown out from the first air outlet 8A by the first blade 4A of the axial fan 4 is introduced into the sub air flow path 3B side through the opening 22. Temperature-controlled air is added with non-heat exchanged air at the room temperature level from the auxiliary air suction port 2B.

(2) Effect of illll Gyuhi 2--In the structure of the ceiling-mounted air conditioner of the invention as claimed in claim 2, the effect of the ceiling-mounted air conditioner as the basic structure of the invention as claimed in claim 1 is In addition, a first damper 21 that can arbitrarily variably adjust the opening degree of the opening 22 is provided at the opening 22 that communicates the main air flow path 3A with the auxiliary air flow path 3B side. Since the inflow control means is formed by 21, it is easy to control the opening and closing of the temperature control air blown out from the second air outlet 8B, that is, the main air to the sub air flow path 3B. The amount of heat exchange air introduced from the flow path 3A can be arbitrarily and easily adjusted, and the final temperature of the air blown into the room can be adjusted accurately.

(3) Effect of the invention according to claim 3 In the structure of the ceiling-mounted air conditioner according to the invention according to claim 3, the effect of the ceiling-mounted air conditioner according to the invention according to claim 1 as a basic structure is In addition, between the upstream portions of the main air suction port 2A and the auxiliary air suction port 2B, there is a second air suction port that arbitrarily and variably adjusts the relative opening of the two suction ports 2A and 2B.
Because of the configuration in which the damper 10 is provided, the temperature control of the temperature control air blown out from the second air outlet 8B, that is, the non-heat exchange with respect to the amount of heat exchange air introduced from the main air flow path 3A. The amount of air can be adjusted arbitrarily, and the final temperature of the conditioned air blown into the room can be adjusted as desired.

(Effect of the invention) Therefore, according to the inventions described in each claim of the present application, in any of the above, it is possible to make the size of the indoor unit as small and compact as possible, and the final It becomes possible to arbitrarily adjust the temperature and control the air volume of the indoor blown air flow, and it becomes possible to effectively equalize the temperature distribution of the indoor air without causing an increase in internal resistance.

(Example) FIGS. 1 to 4 show the configuration and operation of a ceiling-mounted air conditioner (cassette type) according to an example of the present invention.

First, FIG. 1 shows the mechanical structure of the air conditioner main body 100, and reference numeral 1 in the figure is an external casing of the air conditioner main body for ceiling mounting.

The external casing 1 has a box-shaped cassette structure as a whole, and has two main and sub air suction ports 2A and 2B on its side (outer peripheral surface), and first and second air inlets in the center of the lower surface.
While the air outlet ports 8A and 8B are respectively formed inside, for example, an axial flow with a double blade structure having two first and second blades 4A and 4B located at different positions in the radial direction is provided. A fan (centripetal fan) 4 is provided (described later).

The above two sets of main and sub air suction ports 2A, 2B are connected to the partition wall 5.9.
・The upper main air flow path is thick (and the lower side secondary air flow path is divided into two small main and sub upper and lower air flow paths 3A and 3B.The upper main air flow path is large in diameter. A heat exchanger 6.6 for heating and cooling is installed in the middle of the air conditioner 3A, and the air sucked in from the upper main air suction port 2A undergoes heat exchange through the heat exchanger 6.6, and then passes through the heat exchanger 6.6. It is designed to be introduced into each of the first and second blades 4A and 4B of the axial fan 4.

Further, the lower side air flow path 3B is introduced directly into the second blade 4B portion of the axial fan 4 without passing through the heat exchanger 6 as described above.

Further, first and second air outlets 8A and 8B, which are located at the downstream ends of the main air flow path 3A and the sub air flow path 3B and open near the center of the lower surface of the external casing 1, each have a First and second wind direction changing plates (straightening plates) 9A and 9B are provided to arbitrarily change and adjust the blowing direction of the airflow.

And, reference numeral 10 in the figure. lO is the tip portion 5a of the corner walls 5, 5 of the two sets of main and sub air suction ports 2A, 2B.

A split tamper (corresponding to the second damper in the claims) provided on the base end side 10a.
, 10a through the shafts 11, 11 to the tip 5 of the partition wall 5°5.
a, 5a so that it can move up and down. The vertical rotation angle θ1 of the distal end sides 10b, 10b is arbitrarily driven and controlled by, for example, 1fil stepping motors M, , M, and according to the rotation angle θ, The relative amount of air supplied to the main air flow path 3A on the heat exchanger 6.6 side and the amount of air supplied to the auxiliary air flow path 3B side is arbitrarily variably controlled. There is.

On the other hand, the axial fan 4 is fixed to a fan motor 12 attached to the lower surface of the external casing 1 on the side of the ceiling wall 30, and a rotating shaft 13 extending downward of the fan motor 12' and tilted slightly in the centripetal direction. It is composed of an axial flow impeller 4 and a fan casing 15 attached to the upper part of the axial flow impeller 14, and is rotated by the drive of the fan motor 12 to connect the two main and sub air suction ports 2A, 2
B. Indoor air is sucked in slightly centripetally through the two main and sub air channels 3A and 3B, and is blown out into the room at a predetermined angle from the first and second air outlets 8A and 8B.

The axial blades 14 of the axial fan 4, which are tilted in the centripetal direction, have a disk-shaped hub 16 whose center portion is fixed to the lower end of the rotating shaft 13 of the fan motor 12, and a radially outer circumference of the hub 16. The first blade 4A and the second blade formed at different positions
blade 4B, each of those blades 4A, 4B
The guide surface on which the guide surface is implanted forms an arcuate surface. The outer peripheral surface of the fan casing 15 is also formed into a circular arc surface that follows the circular arc surface. These arcuate surfaces form part of the air flow path wall.

Further, reference numeral 17 denotes a fan guide which is disposed so as to surround the outer periphery of the axial flow vane 14 and also serves as a guide for expanding the flow of the air outlet ports 8A and 8B. It is formed with an arcuate surface along the guide surface on the fourth side.

Further, the wind direction changing plates 9A, 9B disposed at the first and second air outlets 8A, 8B are connected to the second and third stepping motors M!, respectively. 1M! , M s ,
It is rotatably driven by M s, and its wind direction can be arbitrarily changed and controlled.

Furthermore, the reference numeral 21.21 indicates the rear ends 5b, 5 of the partition walls 5, 5.
b and the outer edge 15a of the fan caning 15.

A linear damper (patented patent (corresponds to the first dan, f- in the claims).

The linear damper 21. '21, the rotation angle θ4. θ4 is arbitrarily variably controlled, thereby adjusting the amount of air introduced into the second blade 4B side after heat exchange through the heat exchangers 6, 6. There is.

and each of the first to fourth stepping motors, ~M
4 are driven and controlled by corresponding first to fourth stepping motor drive circuits 31 to 34, respectively.

On the other hand, reference numeral 40 denotes a hot air control unit, into which detection signals from a wind speed sensor 41 and a temperature sensor 42 are input, and based on these detection values, a second The rotation angles of the stepping motors M and M4 described above are controlled by performing calculations as shown in the flowchart in the figure, thereby controlling the appropriate hot air blowing state and room temperature distribution state.

Next, the details of the stepping motor drive control will be explained in detail with reference to the flowchart shown in FIG.

That is, first, in step S, the wind speed sensor 4 is
The detected value ■1 of temperature sensor 42 and the detected value ■1 of temperature sensor 42 are read respectively.

Next, in step S, an actual wind speed value sp is calculated from the detected value (1) of the wind speed sensor 41. Also, in step S, the detected value of the temperature sensor 42 is V! Actual temperature Tp based on
Calculate.

Next, the process proceeds to steps S , , S , where each of the above-mentioned wind speed calculation value Sp and temperature calculation value Tp is set to a predetermined set value Sp+
.

Compared with Tp+, the deviation values ΔSp and ΔTp between them
seek.

Then, proceeding further to step S, each of the above deviation values △Sp
, ΔTp, the opening degrees θ1. θ2. θ1
．． θ6 is read from a predetermined control map, a control amount for each stepping motor M, , M, , M, , M4 is set, and each of the above-mentioned stepping motors M, -M is controlled in a feed pattern based on the control amount. Therefore, control signals VO, -D6 are supplied to each step and the ping motor drive circuits 31 to 34.

As a result, the temperature in the room where the air conditioner main body 100 is installed is set to a desired room temperature.

Now, for example, from the start of heating operation of the ceiling-mounted air conditioner having the above configuration to the room temperature fine adjustment stage after the temperature has shifted to a predetermined temperature, the split tamper 10°lO1 butterfly linear par 2
1.21. Wind direction change plate 9A.

A specific control method of 9B will be explained, for example, as shown in FIGS. 3(a) to 3(c).

That is, when starting the heating operation, it is necessary to raise the room temperature as quickly as possible, so as shown in Figure 3(a), the split tamper 10°10 for temperature control is set to the minimum opening state θ, -0°. By controlling the auxiliary air intake ports 2B, 2B completely, the linear damper 21.21 is controlled to open to the maximum opening degree θ, = MAX degree, so that a large amount of room air is sucked into the main air intake. The heated air is sucked in through the ports 2A, 2A and supplied to the heat exchanger 6.6, and the heated air after heat exchange is passed from the main air passage 3A to the first blade 4A and second blade 4B of the axial fan 4. The above-mentioned first and second air outlet 8A make full use of both of the blowing force.

Efficiently blows air into the room from both 8B. Therefore, at this time, each of the wind direction changing plates 9A and 9B is controlled to be in a state parallel to the air flow indicated by the arrow, and functions as a rectifying plate.

As a result, efficient rapid heating becomes possible.

Note that the actual temperature Tp of the indoor air at the start of heating operation (C@when the chamber switch is ON) is, for example, Tp = 5°C, and the set wind speed SP+ set during operation is SP+ = 0.5.
It is assumed that m1sec and the desired set temperature T are T=20°C.

Next, when the rapid heating operation in the state shown in FIG.
Reach 0℃. Then, the actual room temperature Tp is the set temperature T
, = 20°C (Tp = T, = 20°C),
When detected by the temperature sensor 42, the hot air control unit 40 determines this fact, and from now on, as shown in FIG. 3(b), the linear damper 21, 21
is closed to the minimum opening degree θ4 = 0 degree to open the main air flow path 3A.
While preventing the side heat exchange air from flowing into the second air outlet sB, ss side, the split dampers 10, 10 are opened by a predetermined opening degree θ1=on degree to open the auxiliary air intake ports 2B, 2.
B, the air at room temperature without passing through the heat exchanger 6.6 is sucked in, and the second blades 4B, 4B of the axial fan 4 blow the air from the second air outlet 8B, 8B to the first air blower. Outlet 8A, 8 Blows out in a state substantially parallel to the A side heat exchange air (warm air). In this state, the set wind speed Sp
= 0.3s/see, set temperature T p+ = 18℃
By controlling the air conditioner to a certain degree, it is possible to maintain a substantially desired steady state air conditioning condition, but for example, in the state shown in FIG.
See, assuming that the indoor temperature Tp is 20°C, the actual indoor temperature Tp = 20°C is the set temperature TI)+=
TpT'Pl=ΔTpMo2O-18= for 18℃
2 ("C) temperature deviation, and indoor wind speed S p = 0.
5s/see is the set wind speed Sp, = 0.3s/se
5p-3p for e, =ΔP = 0.3-0.5=
This means that there is a wind speed deviation (deficiency) of -0.2 (m/5ee).

Therefore, in this case, as shown in FIG. 3(c), for example, the opening degree θ of the split damper 10.
The heat exchanger 6.6 is opened slightly wider than the state shown in Figure (b).
The high flow rate and low temperature air that does not pass through the second air outlet 8
While aiming to increase the wind speed by blowing out a little more than B and 8B, the opening angles θ, θ, of the wind direction changing plates 9B and 9B on the second air outlet 8B and 8B side are rotated slightly outward and upright. By controlling, the air blown from the second air outlet 8B, 8B side on the room temperature side where the temperature is relatively low is blown into the breeze blown from the first air outlet 8A, 8A side. This improves the mixing degree of both air, makes the temperature distribution uniform, effectively lowers the room temperature, and converges to the set temperature TI)+=18°C.

Furthermore, the ceiling-mounted air conditioner is further controlled as shown in FIG. 4, for example, during cooling operation.

- That is, during the cooling operation, it is better to effectively send cold air to the upper layer of indoor air near the ceiling, so first, the split damper 1'0.10 is
B, close 2B and move the linear damper 21.21 to θ
, = MAX degree state to efficiently supply the cooled air to the first and second air outlets 8A, 8B via the heat exchanger 6.6.
The wind direction changing plates 9A and 9B of B are controlled to be nearly horizontal so that the cold air blown out is blown out horizontally so as to spread as far as possible to the upper part of the entire room.

As a result, an effective cooling state with uniform temperature distribution can be achieved.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing the structure of a ceiling-mounted air conditioner according to an embodiment of the present invention, FIG. 2 is a flowchart showing the control operation of the hot air control unit of the air conditioner body, and FIG. (a) to (c) are diagrams showing how the air conditioner blows hot air during heating operation, and FIG. 4 is a diagram showing how the air conditioner blows out air during cooling operation. 1...External caning 2A...Main air suction port 2B...Sub air suction port 3A...Main air flow path 3B...Sub air flow path 4... Axial fan 4A...First blade 4B...Second blade 5...Partition wall 6...Heat exchanger 8A...First air outlet 8B. ...Second air outlet 9^, 9B...Wind direction change plate 10...Suburi, damper bar 12...Fan motor 21...Linear damper 22...Opening 40. ... Warm air control unit 41 ... Wind speed sensor 42 ... Temperature sensor

Claims (3)

[Claims] 1. A ceiling-mounted air conditioner casing (1), two main and sub air inlets (2A) and (2B) provided vertically on the outer periphery of the casing (1), and the air conditioner casing (1). The first and second holes are provided at the center of the lower surface of the machine casing (1) at different positions from the center toward the outer circumference.
air outlet (8A), (8B); a main air flow path (3A) formed from the downstream side of the main air intake port (2A) to the first air outlet (8A); A heat exchanger (6) disposed on the main air suction port (2A) side of the air flow path (3A), and the two main and sub air flow paths (3A), (
3B) and the first and second air outlets (
8A), (8B), the first and second vanes located at different positions in the radial direction are made to correspond to the two main and secondary air flow paths (3A), (3B). The axial flow fan (4) is disposed, and the auxiliary air flow path (3B) of the circulating air of the main air flow path (3A) is provided at the upstream portion of the axial flow fan (4).
) side. 2. The inflow control means connects the opening (22) that connects the main air flow path (3A) to the sub air flow path (3B) side.
the first damper (22) whose opening degree can be arbitrarily variably adjusted;
21). The ceiling-mounted air conditioner according to claim 1. 3. Between the upstream parts of the main air suction port (2A) and the auxiliary air suction port (2B), there is a second damper ( 10)
A ceiling-mounted air conditioner characterized by being provided with.