JP2003042480A - Ceiling installation type heat pump air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a ceiling installation type heat pump air conditioner which is compact and easy in maintenance. SOLUTION: The air conditioner is provided, in a casing, with an exhaust duct A having a condenser 2, a fresh air duct having an evaporator 3 and a frame 5 having a refrigerant circulation circuit C comprising the condenser 2, the evaporator 3, a compressor and the like. The frame 5 having the circuit C is freely detachably connected in a suspended state by an elastic damper 21 provided within the casing 1. An opening 6 for vertically inserting and removing the frame 5 having the circuit C is formed in the bottom face of the casing 1. The opening 6 is closed with a removable or openable exterior plate 7.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a ceiling-mounted heat pump type air conditioner.

[0002]

2. Description of the Related Art Conventionally, an air conditioner that uses cold / hot water requires a heat source for cold / hot water, a total heat exchanger, and the like.

[0003]

As a result, it is bulky and has a limited installation location. It is difficult to install indoors and the equipment cost is high. Therefore, it is an object of the present invention to provide a ceiling-mounted heat pump type air conditioner that solves these problems.

[0004]

In order to achieve the above object, a ceiling-mounted heat pump type air conditioner of the present invention is provided with an exhaust air passage having a condenser and an outside air blower having an evaporator in a casing. And a frame with a refrigerant circulation circuit composed of a condenser, an evaporator, a compressor, etc., and the frame with a refrigerant circulation circuit is attached and detached as a suspension by a telescopic damper provided inside the casing. Openings were formed on the bottom surface of the casing for freely connecting and disconnecting the frame with the refrigerant circulation circuit, and the openings were covered with a detachable or openable / closable exterior plate. Further, the exhaust air blowing passage and the outside air blowing passage are formed substantially straight and adjacent to each other in substantially parallel to each other, and the frame with the refrigerant circulation circuit is provided over the exhaust blowing passage and the outside air blowing passage. Furthermore, the fin tubes of the condenser and the evaporator are elliptical tubes.

[0005]

1 to 3 show an embodiment of a ceiling-mounted heat pump type air conditioner according to the present invention. This air conditioner has a casing 1 provided with a condenser 2 and an exhaust gas. Blower A, outside air B provided with evaporator 3, and condenser 2
And a frame 5 with a refrigerant circulation circuit C including an evaporator 3, a compressor 4, and the like. The refrigerant circulation circuit C also has a receiver (not shown), an expansion valve, a switching valve for the refrigerant circulation direction, and the like, and is configured to be able to switch between heat absorption and heat dissipation of the condenser 2 and the evaporator 3.

The frame 5 with the refrigerant circulation circuit C is detachably connected as a suspension by an expandable rod-shaped damper 21 provided inside the casing 1. An opening 6 is formed on the bottom surface of the casing 1 for vertically inserting and removing the frame 5 with the refrigerant circulation circuit C, and the opening 6 is covered with a detachable or openable / closable exterior plate 7. A drain pan 20 is detachably provided between the frame 5 and the exterior plate 7. The damper 21 includes a cylinder filled with gas or oil and a piston rod that is extendable and contractible. The damper 21 is
The frame 5 with the refrigerant circulation circuit C is configured to delay the descending speed, that is, the resistance force (damping force) works only in the descending direction (rod extending direction), and the resisting force is not applied in the ascending direction. Make it easy to take in and out.

The exhaust air blow passage A and the outside air blow passage B are formed in a substantially straight shape so as to be adjacent to each other substantially in parallel. 5 is provided so as to straddle the exhaust air passage A and the outside air air passage B. A blower 1 is provided for each of the exhaust air passage A and the outside air passage B.
4 and 15 are provided, and a humidifier 9 is provided in the outside air blowing passage B.
The exhaust air passage A and the outside air passage B may be partitioned by partition plates or the like, and the partition plate disposed between the refrigerant circulation circuits C may be provided on either side of the frame 5 and the casing 1. Condenser 2
The fin tube 8 of the evaporator 3 is preferably an elliptical tube (see FIG. 4), but may be a circular tube.

An outside air intake 10, an air supply port 11, a return air intake 12 and an exhaust port 13 are formed in the casing 1, and the outside air intake port 10 and the air supply port 11 are connected to each other through an outside air blow passage B. The return air intake 12 and the exhaust port 13 are connected to each other through the exhaust air flow path A. The return air intake 12 is connected to the inside of the room via a duct or a suction port, and the air supply port 11 is connected to the inside of the room via a duct or a blowout port. The solid and dotted outline arrows indicate the blowing direction.

In this ceiling-mounted heat pump type air conditioner, the outside air taken in from the outside air intake 10 is heat-exchanged by the evaporator 3, and the humidifier 9 is operated to supply air from the air supply port 11 as necessary. At the same time, the return air (exhaust air from the inside) taken in from the return air inlet 12 exchanges heat with the circulating refrigerant in the condenser 2 to absorb or radiate heat, and exhaust the air from the exhaust port 13 to the outside. In this way, the exhaust heat can be used to reduce the heat exchange load of the condenser 2, and the effect of using the total heat exchanger can be obtained in the condenser 2. Note that the compressor 4 may be stopped when the outside air cooling operation or the ventilation operation is performed.

The air conditioner of each of the above embodiments can be used as an outside air processing air conditioner, and the installation location can be changed or the vertical type can be changed to the horizontal type and vice versa.

[0011]

According to the invention of claim 1, the air conditioner has a simple structure and is easy to manufacture. No separate heat source for hot and cold water is required. Since the condenser can be operated by utilizing the exhaust heat from the inside, the heat exchange capacity is high and the refrigerant circulation circuit can be miniaturized to save energy, and no extra parts such as a total heat exchanger are required.
The entire air conditioner can be made compact, the installation space is small, and equipment costs and running costs can be reduced. A single heat pump type air conditioner installed on the ceiling can perform outside air processing cooling / heating operation, outside air cooling operation, ventilation operation, and does not require a separate outside air processing air conditioner. Without removing the entire casing, only the refrigerant circulation circuit can be taken out from the casing for easy refrigerant recovery work and maintenance, and it is easy to install and store. Also, by replacing only the refrigerant circulation circuit, it is possible to reduce the cost at the time of renewal. Since the refrigerant circulation circuit is integrated with the frame,
Easy to take out and store and has good workability. With the damper, the frame with the refrigerant circulation circuit can be slowly and automatically lowered by its own weight (to be taken out) to reduce the labor, and it is possible to prevent a fall accident and it is also excellent in safety. In this way, the slide function of the frame with the refrigerant circulation circuit and the fall prevention function can be combined with only the damper, so that the number of parts can be reduced and the manufacturing becomes easy. According to the second aspect of the invention, since the exhaust air duct and the outside air duct are adjacent to each other and the refrigerant circulation circuit is provided so as to extend over them, the refrigerant circulation circuit becomes compact. According to the third aspect of the present invention, the pressure loss does not increase and the heat exchange capacity does not decrease even when used at a high wind speed, so that a small evaporator and condenser can be used, and the air conditioner can be made significantly compact. Further, since pressure loss is reduced at normal wind speed and heat exchange efficiency is improved, a small blower can be used and noise can be reduced.

[Brief description of drawings]

FIG. 1 is a plan view showing an embodiment of the present invention.

FIG. 2 is a side view of FIG.

FIG. 3 is a perspective view showing a state in which the frame is lowered with a part thereof omitted.

FIG. 4 is a cross-sectional view of a fin tube group.

[Explanation of symbols]

1 casing 2 condenser 3 evaporator 4 compressor 5 frames 6 openings 7 Exterior plate 8 fin tubes 21 damper A exhaust air duct B Outside air duct C Refrigerant circulation circuit

Claims (3)

[Claims] 1. A refrigerant circulation consisting of an exhaust air passage A having a condenser 2, an outside air air passage B having an evaporator 3, a condenser 2, an evaporator 3, a compressor 4 and the like in a casing 1. Circuit C
The frame 5 with a refrigerant circulation circuit C is detachably connected as a suspension by a retractable damper 21 provided inside the casing 1, and a refrigerant is attached to the bottom surface of the casing 1. A ceiling-mounted heat pump type air conditioner characterized in that an opening 6 for vertically inserting and removing the frame 5 with a circulation circuit C is formed, and the opening 6 is covered by a detachable or openable / closable exterior plate 7. Machine. 2. An exhaust air blow passage A and an outside air blow passage B are formed substantially straight and adjacent to each other substantially in parallel, and a frame 5 with a refrigerant circulation circuit C is provided on the exhaust blow air passage A and the outside air blow passage B, respectively. The ceiling-mounted heat pump type air conditioner according to claim 1, wherein the heat pump type air conditioner is provided straddlingly. 3. The ceiling-mounted heat pump type air conditioner according to claim 1, wherein the fin tubes 8 of the condenser 2 and the evaporator 3 are elliptical tubes.