JP4684868B2 - Fan coil unit - Google Patents

Description

The present invention relates to a ceiling-embedded fan coil unit.

Conventionally known ceiling-embedded fan coil units include air guiders, cross flow fans, heat exchangers, and stabilizers that constitute the air blower circuit inside the box with the bottom open. A water receiving tray that receives drain water discharged from the heat exchanger is provided below the exchanger, and the lower portion of the box is covered with a decorative panel portion that includes a panel body, a suction portion, and a blow-out portion.
The suction portion is provided with a suction grille and an air filter inside thereof, and the blowout portion is provided with a plurality of left and right wind direction changing blades and outer vertical wind direction changing blades. Further, a driving motor for the up / down air direction changing blade is provided at one end of the up / down air direction changing blade, and an operation signal of the fan coil unit is provided inside the panel opening hole formed in the decorative panel at one end side of the blowing portion. A receiving device, a thermostat for detecting the room temperature, a sensor for adjusting the air volume, and the like are provided.

The fan coil unit configured as described above receives the operation signal from the wireless remote controller, the cross-flow fan rotates to generate a blowing action, and the indoor air passes through the suction grille and the air filter. The air is sucked into the heat exchanger to exchange heat, and further led to the air guider to be discharged again into the room through the blow-out part of the decorative panel, thereby air conditioning the room.
When the room temperature reaches the set temperature, the thermostat rotates the drive motor for the up / down air direction changing blades to reduce the amount of air blown into the room and keep the room temperature constant. The supply pressure of the flow fan increases, and the number of rotations of the cross flow fan decreases by the sensor (by performing constant pressure control), and the room temperature is kept constant. (For example, refer to Patent Document 1.)
That is, since the rotation speed of the cross flow fan is changed according to the fluctuation of the room temperature, when the rotation speed of the cross flow fan becomes low, condensation is likely to occur in the heat exchanger, and Due to the decrease in wind speed, a cold draft was generated, which made the residents uncomfortable, and the operating efficiency of the fans was also poor.

JP-A-10-238806 (FIGS. 3 and 4)

  The present invention has a simple structure, can be manufactured at low cost, and prevents the heat exchanger from condensing by keeping the rotational speed of the blower (fan) constant regardless of the set temperature. It is an object of the present invention to provide a ceiling-embedded fan coil unit that realizes a comfortable living environment because drafts are not generated and that improves the operating efficiency of the blower.

Therefore, in order to solve the above-mentioned problem, the present invention is configured as a first means, in which a blower, a heat exchanger, and a water receiving portion are arranged inside, and one side of the heat exchanger is arranged on the outlet side, and the other side. A body plate with a suction side as a side, and a partition plate that is disposed at a predetermined position in the vertical direction on the blow-out side, and that defines a blow-off passage at the upper portion of the blow-out port inside the fuselage and a ventilation passage that communicates with the lower portion of the blow-out port on the suction side The conditioned air that has passed through the heat exchanger passes through a part of the partition plate from the blowing passage and is blown downward to blow a predetermined amount to the indoor side, and bypass the surplus to the air passage. A blower outlet unit disposed at the lower end of the blowout side, a central panel connected to the suction side of the blower outlet unit, an openable / closable inspection panel provided on the suction side of the central panel, and a communication to the suction side fan coil unit consisting of a suction port for The partition plate has a downward duct projecting downward, and the outlet unit has an upward duct having a downward duct and a bypass gap, and the opening end surface of the upward duct has a surface area larger than the opening end face of the downward duct. The conditioned air blown from the downward duct is blown into the room corresponding to the opening of the damper provided in the outlet unit, and the excess is bypassed to the air passage, and the heat exchanger from the suction side It will be blown out to the blowout passage again

Next, the present invention is configured as the second means. In addition to the above configuration, the outlet unit is provided with outlet holes for blowing conditioned air on the indoor side in the left and right and front and rear directions, and the inlet is , farthest from the corner portion of the central panel side of the air outlet and the front and rear air outlet, a shall be provided on the front and rear end of the inspection panel.

According to the first aspect of the present invention, even if the amount of blown air is reduced by the damper, it is possible to operate without changing the number of rotations of the blower by bypassing the surplus to the air passage. In addition, it is possible to prevent the occurrence of a cold draft due to a decrease in the wind speed by maintaining the wind speed of the blown air flow constant, and to realize a comfortable living environment and to improve the operating efficiency of the blower.
Moreover, since it is a simple structure which only bypasses an excess part to an air path, it can manufacture at low cost.
Further, since the downward duct is formed in the partition plate and the upward duct is formed in the outlet unit, the air flow can be reliably guided in a predetermined direction, and the surface area of the opening end surface of the upward duct of the outlet unit is determined by the partition plate. It is formed with a larger surface area than the opening end face of the downward duct and has a simple structure with a bypass gap between the downward duct and the upward duct, and conditioned air blown from the downward duct is blown into the room through the outlet unit. At the same time, surplus conditioned air blown from the downward duct corresponding to the opening of the damper provided in the outlet unit is bypassed from the bypass gap to the ventilation path, and further mixed with room air from the suction side Then, it can pass through the heat exchanger and blow out again into the blowout passage, preventing condensation of the heat exchanger and maintaining the air velocity of the blown airflow constant. To prevent the occurrence of cold drafts due to a decrease in wind speed by things, when to realize a comfortable living environment co, it is possible to improve the operating efficiency of the blower.

According to the invention of claim 2, in addition to the above effects, since the blowout holes for blowing conditioned air on the indoor side are provided across the left and right front and rear four directions, the entire indoor area can be air-conditioned evenly, Since the suction port is provided on the front and rear end side of the inspection panel, which is farthest from the corners of the central panel side outlet and the front and rear outlets, in addition to the effect of the invention according to claim 1, The short circuit in which the air current of the conditioned air blown inward is immediately sucked from the suction port can be suppressed to a minimum, and therefore the indoor air conditioning can be performed in a short time .

An air blower, a heat exchanger, and a water receiving portion are arranged inside, and a heat exchanger having one side of the heat exchanger as a blowing side and the other side as a suction side, and a predetermined position in the vertical direction on the blowing side. The upper part on the inner outlet side is used as the outlet passage, the lower part on the outlet side is divided into a ventilation passage communicating with the suction side, and the conditioned air passing through the heat exchanger passes through a part of the partition plate from the outlet passage. The air outlet is blown downward and a predetermined amount is blown to the indoor side, and the surplus is bypassed to the air passage, and the air outlet unit disposed at the lower end portion on the air outlet side of the fuselage and the air inlet side of the air outlet unit Consisting of a central panel provided continuously, an openable / closable inspection panel provided on the suction side of the central panel, and a suction port communicating with the suction side, the partition plate has a downward duct protruding downward, and a blowout unit With a downward duct and a bypass gap The opening end face of the upward duct has a larger surface area than the opening end face of the downward duct, and the conditioned air blown out from the downward duct is received according to the opening degree of the damper provided in the outlet unit. While blowing into the room, the surplus is bypassed to the air passage, passes through the heat exchanger from the suction side, is blown out again into the blow-out passage, and the blowout unit has blowout holes for blowing conditioned air into the left and right sides 4 The suction port is provided on the front and rear end side of the inspection panel, which is farthest from the corner of the central panel side outlet and the front and rear outlets.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
In FIG. 1, reference numeral 1 indicates a substantially rectangular body having an open bottom surface, reference numeral 2 indicates a heat exchanger disposed inside the airframe 1, and reference numeral 21 indicates a lower part of the heat exchanger 2. The arranged water receiver is shown.
In FIG. 1, two blowers 22 and 22 (shown in FIG. 2) are arranged on the left side of the heat exchanger 2 with a predetermined interval in the front-rear direction, and the interior of the body 1 is divided into two in the vertical direction. The partition plate 3 is disposed from the lower surface of the water receiving portion 21 to the right side, and the outlet unit 5 is disposed below the partition plate 3 so that the lower surface faces the indoor side and closes the lower right side of the airframe 1. The central panel 6 is continuously provided on the left side of the lower surface of the outlet unit 5, and the inspection panel 61 that can be opened and closed is provided on the left side of the central panel 6. The blower is located before and after the inspection panel 61 in the closed state. Suction ports 62 and 62 communicating with the 22 and 22 sides are formed. Reference numeral 220 denotes a motor of the blowers 22 and 22.

The airframe 1 is composed of an upper wall 11, left and right walls 12, 12, and front and rear walls 13, 13. The airframe 1 is attached to the ceiling 17 with a hanging metal fitting or the like.
In FIG. 1, the heat exchanger 2 is provided in the front-rear direction at a substantially central portion in the left-right direction of the body 1, and the water receiving portion 21 extends in the front-rear direction of the body 1 below the heat exchanger 2. The heat exchanger 2 and the water receiver 21 partition the upper part of the machine body 1 in the left-right direction. The heat exchanger 2 has a blower 22, 22 side on the suction side 20 and a blowout unit 5 side on the blowout side 10. It is said.

The partition plate 3 is disposed from the lower surface of the water receiving portion 21 to the front and rear walls 13, 13 and the right wall 12 of the blowing side 10, and divides the blowing side 10 in the vertical direction. A blowing passage 100 is formed between the walls 11.
A cylindrical downward duct 31 that protrudes downward from the partition plate 3 is formed in the partition plate 3 at a location located in the horizontal center of the blowout passage 100.
That is, the conditioned air that has passed through the heat exchanger 2 and is blown into the blowing passage 100 is blown downward from the downward duct 31 because the passage 100 is formed in a substantially sealed space. At this time, since the downward duct 31 protrudes downward, the blown airflow can be reliably guided in a predetermined direction.
In the embodiment, the downward duct 31 is formed in a cylindrical shape, but it goes without saying that it may be a square tube.

As shown in FIGS. 3 and 4, the air outlet unit 5 includes an outer frame 52 in which a cylindrical upward duct 51 having a surface area larger than the opening end face of the downward duct 31 is protruded upward at the center of the upper end, A square-shaped support substrate 53 having a larger surface area than the opening end surface of the upward duct 51 and disposed at a predetermined interval downward from the lower end of the upward duct 51 on the inner surface upper side of the outer frame 52, and 4 of the support substrate 53 A damper 54... Rotatably attached to the edge, a room temperature adjusting mechanism 7 disposed below the support substrate 53 for adjusting the opening degree of the damper 54. It comprises a decorative panel 55 that is rotatably attached to one edge portion via a mounting bracket and closes the room temperature adjusting mechanism 7, the damper 54,...

The air outlet unit 5 is configured as described above, and when the decorative panel 55 is closed, the upward duct 51 is provided below the downward duct 31 so that the lower surface of the body 1, the decorative panel 55, and the ceiling 17 are substantially flush with each other. The downward duct 31 and the upward duct 51 are connected to each other by a strip-shaped connecting metal 50... With a gap (bypass gap 500) and the center position being vertically aligned so as to have the same vertical line shape.
Further, the lower end of the outer frame 52 is connected to the lower ends of the front and rear walls 13 and 13 and the right wall 12, and the central panel 6 is connected to the lower end of the outer frame 52 and the lower ends of the front and rear walls 13 and 13 of the body 1. The ventilation path 200 is formed between the partition plate 3, the outlet unit 5, and the central panel 6 by being connected.

The conditioned air that has passed through the blowout passage 100 and blown out from the downward duct 31 into the upward duct 51 has an opening degree of the four dampers 54 of 100 percent (four inclined guide walls 521..., 4 When the air outlet 40 formed between the two dampers 54 is in the most open state), the air is blown into the room as it is, but the opening degree of the damper 54 is reduced corresponding to the indoor set temperature. (When the damper 54 rotates upward with the upper end as the center and the blower outlet 40 is closed), the conditioned air blown into the upward duct 51 is partially blown out of the blower outlet 40. At the same time as the air is blown into the room, a part (the conditioned air that has not been blown out from the air outlet 40... Because the opening degree of the damper 54 is reduced) flows into the ventilation path 200 from the bypass gap 500, and the air inlet It flows from the suction side 20 to the heat exchanger 2 with the sucked indoor air from 2,62.
In the embodiment, the bypass gap 500 has a vertical gap formed by providing a predetermined gap between the lower end of the downward duct 31 and the upper end of the upward duct 51, and the surface area of the opening end surface of the upward duct 51 downward. The gap is formed by a horizontal gap formed by making it larger than the surface area of the opening end face of the duct 31, but the size of each gap is appropriately selected.

The room temperature adjustment mechanism 7 has a square-shaped control plate 71 that is rotatably held via a rotation support shaft 531 with respect to the support substrate 53 below a predetermined dimension of the support substrate 53, and the control plate 71 is brought to room temperature. Correspondingly, a cooling thermostat (not shown) and a heating thermostat 72 that rotate at a predetermined angle, and an operating rod 73 that connects the four corners of the control plate 71 and the longitudinal intermediate portion of the damper 54. And a change over thermostat 74 that switches between the cooling mode and the heating mode in accordance with the temperature of the conditioned air supplied into the upward duct 51 (hereinafter referred to as supply air temperature).

A cooling thermostat (not shown) and a heating thermostat 72 are filled with a wax-like substance in a cylinder. The wax expands when heated, pushes the piston shaft, and contracts when cooled by a spring. The shaft is pulled back, the control plate 71 is rotated by the movement of the piston shaft, and the damper 54... Is rotated by the rotation of the control plate 71 through the operating rod 73.
The room temperature is set manually within a range of 23 degrees Celsius to 27 degrees Celsius with a cooling thermostat (not shown) and 20 degrees Celsius to 24 degrees Celsius with a heating thermostat 72 with the decorative panel 55 opened. It can be set with.

That is, when the supply air temperature becomes 26.5 degrees Celsius or more when used in the cooling mode, the heating mode is automatically set by the action of the change over thermostat 74, and the heating thermostat 72 is turned into a cooling thermostat (not shown). ) To control the dampers 54. The resident can adjust the temperature within the range of 20 degrees Celsius to 24 degrees Celsius by adjusting the thermostat 72 for heating.
When the supply air temperature falls below 20 degrees Celsius, the cooling over thermostat 74 automatically enters the cooling mode, and the cooling thermostat (not shown) controls the dampers 54. As in the heating mode, the occupant can set the temperature within a range of 23 degrees Celsius to 27 degrees Celsius by adjusting a cooling thermostat (not shown).

In the cooling mode, the conditioned air blown from the air outlets 40... Is blown along the ceiling surface in order to efficiently cool the entire room. Then, the conditioned air is blown out along the ceiling surface, so that the indoor air below the outlet unit 5 is attracted upward. A part of the attracted room air flows in a direction opposite to the air conditioning / heating thermostat 72 from the induction holes 530 and 530 formed in the support substrate 53 between the support substrate 53 and the control plate 71. The airflow is further attracted to the airflow) and passes around the cooling thermostat (not shown).
Accordingly, the cooling thermostat (not shown) senses the room temperature, and when the room temperature is higher than the set temperature, the control plate 71 is rotated in the direction in which the dampers 54. Is low, the control plate 71 is rotated in the direction in which the dampers 54.

At this time, only a part of the conditioned air is blown indoors by reducing the opening degree of the dampers 54..., But surplus conditioned air that has not been blown into the room is from the bypass gap 500. Since it is bypassed by the ventilation path 200, the air pressure in the blowout passage 100 is kept constant, the supply pressure of the blower does not increase, and therefore the rotational speed of the blower is also constant.
And since the rotation speed of an air blower is constant, the condensation of a heat exchanger and generation | occurrence | production of a cold draft are prevented, A comfortable living environment is implement | achieved and the operating efficiency of an air blower can also be improved.

On the other hand, in the heating mode in which the supply air temperature is 26.5 degrees Celsius or higher, contrary to the cooling mode, when the room temperature is lower than the set temperature, the dampers 54 ... are opened by the heating thermostat 72 and are higher than the set temperature. And the opening degree of the dampers 54.
In the heating mode, there is no risk of condensation on the heat exchanger, but even if the opening of the damper 54 is reduced, the rotation speed of the blower is kept constant, thereby preventing drafting and improving the operational efficiency of the blower. The effect of the present invention that it can be used is exhibited.

The inspection panel 61 is connected at its left end edge to the lower end of the left wall 12 of the machine body 1 through a hinge or the like so as to be freely opened and closed.
The dimension in the front-rear direction is set to be smaller than the dimension in the front-rear direction of the body 1, and a gap formed between the front and rear end surfaces of the inspection panel 61 and the front and rear walls 13, 13 in the closed state is a suction port 62. 62, and with the inspection panel 61 open, it is attached to and removed from filter support bases 63, 63 provided at predetermined intervals in the left-right direction between the lower ends of the front and rear walls 13, 13 of the machine body 1. The filter 64 that can be freely attached can be cleaned.

Cross section of the present invention Plan view of the present invention Sectional view of the main part of the present invention in a state where the opening of the damper is reduced Cross-sectional view of the main part of the present invention in a state where the opening of the damper is opened

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Airframe 10 Outlet side 100 Outlet passage 2 Heat exchanger 20 Suction side 21 Water receiving part 22 Blower 200 Ventilation path 3 Partition plate 31 Downward duct 40 Outlet 5 Outlet unit 51 Upward duct 500 Bypass gap 6 Central panel 61 Inspection panel 62 Suction port

Claims (2)

An air blower, a heat exchanger, and a water receiving portion are arranged inside, and a heat exchanger having one side of the heat exchanger as a blowing side and the other side as a suction side, and a predetermined position in the vertical direction on the blowing side. The upper part on the inner outlet side is used as the outlet passage, the lower part on the outlet side is divided into a ventilation passage communicating with the suction side, and the conditioned air passing through the heat exchanger passes through a part of the partition plate from the outlet passage. The air outlet is blown downward and a predetermined amount is blown to the indoor side, and the surplus is bypassed to the air passage, and the air outlet unit disposed at the lower end portion on the air outlet side of the fuselage and the air inlet side of the air outlet unit In a fan coil unit comprising a central panel provided continuously, an openable / closable inspection panel provided on the suction side of the central panel, and a suction port communicating with the suction side , the partition plate has a downward duct projecting downward. The outlet unit is below The duct has an upward duct with a bypass gap, and the opening end face of the upward duct has a larger surface area than the opening end face of the downward duct, and corresponds to the opening degree of the damper provided in the outlet unit. A fan coil unit characterized in that the conditioned air blown from the duct is blown into the room, the surplus is bypassed to the air passage, passes through the heat exchanger from the suction side, and is blown again into the blow passage . The blowout unit has blowout holes for blowing conditioned air on the indoor side in four directions, left and right, front and rear, and the suction port is farthest from the central panel side blowout and the corners of the front and rear blowout. fan coil unit according to claim 1, characterized that you have provided in the longitudinal end of the.