JP2002323232A - Ceiling-mounted heat pump type air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a compact ceiling mounted heat pump type air conditioner which is easily maintained. SOLUTION: An air supply opening 7 and an exhaust air intake 8 are made into one of opposite end faces of casing 1, and an outdoor air intake 6 and an exhaust opening 10 are made in the other of the opposite end faces. Casing 1 is provided with exhaust air duct B, communicating with the exhaust air intake 8 and the exhaust opening 10 and provided with a condenser 4 and a fan 5, an outdoor air duct C having one end part communicating with the windward side of the condenser 4 in the exhaust air duct B, a supply air duct A having one end part communicating with the air supply opening 7 and provided with an evaporator 2 and a fan 3, and a damper mechanism D which can freely regulate the volume of exhaust air in the exhaust air duct B, outdoor air in the outdoor air duct C and outdoor air in the supply air duct A. The outdoor air duct C is juxtaposed between the supply air duct A and the exhaust air duct B, and the outdoor air intake 6 makes the other end part of the outdoor air duct C and the other end part of the supply air duct A interconnected. A refrigerating circuit comprising the condenser 4, the evaporator 2 and a compressor 12 is arranged removably from the casing 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

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

[0002]

2. Description of the Related Art Conventionally, an air conditioner utilizing cold and hot water has required a heat source for cold and hot water, a total heat exchanger, and the like.

[0003]

Therefore, it is bulky and the installation place is limited, and it is difficult to install it on an indoor ceiling or the like.
Equipment costs were also high. Therefore, an object of the present invention is to provide a ceiling-mounted heat pump air conditioner that solves these problems.

[0004]

In order to achieve the above object, a ceiling-suspended heat pump type air conditioner according to the present invention is provided with a supply port and an exhaust port formed at one of the opposed end faces of a casing. The outside air inlet and the exhaust port are formed on the other side, and in the casing, an exhaust air passage provided with a condenser and a blower communicating with the exhaust air inlet and the exhaust port, and one end is located upstream of the condenser of the exhaust air passage. , An air supply path provided with an evaporator and a blower at one end communicating with an air supply port, an exhaust air supply path, an outside air supply path outside air, and an outside air supply path. And a damper mechanism capable of adjusting the amount of air flow, and the air supply air passage is sandwiched between the supply air supply passage and the exhaust air supply passage so as to be adjacent to each other in parallel and astride the other end of the external air supply passage and the other end of the supply air supply passage. A refrigeration circuit having a condenser, an evaporator, and a compressor that communicates with the outside air intake. It was constructed freely takeout-housing relative to the casing. Furthermore, the evaporator is divided into a windward split evaporator and a leeward split evaporator, and a first refrigerating circuit is configured by a windward split evaporator and a condenser shared with the first compressor, and a leeward split evaporator is formed. A second refrigeration circuit was constituted by the condenser, the second compressor, and the common condenser. Further, the capacity ratio of the two compressors was set to 4: 6. Further, the fin tubes of the evaporator and the condenser were made elliptical tubes.

[0005]

1 to 3 show an embodiment of a ceiling-suspended heat pump type air conditioner according to the present invention. This air conditioner supplies air to one of a pair of opposed end surfaces of a casing 1. Mouth 7
And an exhaust port 8 and an outside air inlet 6 and an exhaust port 10 are formed on the other of the opposed end surfaces, and a condenser which communicates with the exhaust port 8 and the exhaust port 10 in the casing 1 and is also used for exhaust heat recovery. An exhaust air passage B provided with an air blower 4 and an air blower 5; an outside air air passage C having one end communicating with windward of the condenser 4 of the exhaust air passage B;
One end communicates with the air supply port 7, the air supply air path A provided with the evaporator 2 and the air blower 3, the exhaust air of the exhaust air path B, the external air of the external air air path C, and the external air of the air supply air path A, respectively. An adjustable damper mechanism D; and a refrigeration circuit 11 including a compressor 12, a liquid receiver, an expansion valve, a switching valve, and the like, which can switch between heat absorption and heat radiation, and
The outside air passage C is sandwiched between the air supply passage A and the exhaust air passage B so as to be adjacent to each other in parallel, and the outside air intake port 6 is connected to the other end of the outside air passage C and the other end of the supply air passage A. The refrigeration circuit 11 having the condenser 4, the evaporator 2, and the compressor 12 is configured to be able to be taken out and stored in the casing 1.

More specifically, a refrigeration circuit 11 having a condenser 4, an evaporator 2, and a compressor 12 is fixedly integrated with a frame 15 which is detachably mounted in the casing 1, and an opening is provided on one surface of the casing 1. A portion 16 is formed, and the opening 1
The frame 15 with the refrigeration circuit is configured to be freely taken out and stored in the frame 6. An opening 16 is provided with a detachable or openable / closable exterior plate 17, and a drain pan (not shown) is detachably attached to the frame 15 with a refrigeration circuit. In the illustrated example, the opening 16 is the bottom surface of the casing 1, but may be formed on a surface other than the bottom surface such as a side surface.

The casing 1 has an exhaust damper 13 for adjusting the amount of exhaust air from the exhaust inlet 8 to the condenser 4, and an air damper 13 for adjusting the amount of external air from the outside air inlet 6 to the condenser 4 to send the air to the condenser 4. An external air damper 14 for assisting the air flow and an air supply damper 9 for adjusting the external air flow from the external air inlet 6 to the evaporator 2 are provided to constitute a damper mechanism D. Each damper 13, 14,
No. 9 is configured so that the air volume can be freely adjusted between 0 and 100%.
The exhaust inlet 8 is connected to a room or the like via a duct or a suction port, and the air supply port 7 is connected to a room or the like via a duct or an outlet. When this air conditioner is installed on a ceiling such as an indoor corridor, the outside air intake 6 and the exhaust port 10 are connected to the outside through a duct or the like, but the duct may be omitted depending on the installation location such as a veranda. It is. Solid and dotted outline arrows indicate the direction of air flow.

The evaporator 2 is divided at a distance into a windward split evaporator 2a and a leeward split evaporator 2b, and is divided by a condenser 4 shared with the windward split evaporator 2a and the first compressor 12. One refrigeration circuit 11 is configured. The capacity ratio between the compressors 12 and 12 (one of the divided evaporators: the other of the divided evaporators) of the two refrigeration circuits 11 and 11 is optimally set to 4: 6, but may be other ratios. Usually, when the same evaporator is used by switching between cooling (cooling) and heating (heating), the capacity required for heating is about 60% of that for cooling. Therefore, by setting the split ratio as described above, energy saving can be achieved by using only the split evaporator 2a on the windward side, that is, only the compressor 12 of the one refrigeration circuit 11 at the time of heating. The surface wind speed of the evaporator 2 is set to 3.5 to 4.0 m / s, and a small air conditioner 4 can be used at a high wind speed and the air conditioner can be made compact. Although it is optimal to set it to 0.0 m / s, a range other than these may be used. The fin tubes 19 of the evaporator 2 and the condenser 4 are preferably elliptical tubes (see FIG. 4), but may be circular tubes.

In this ceiling-suspended heat pump type air conditioner, the outside air taken in from the outside air inlet 6 is heat-exchanged by the evaporator 2, and the humidifier is operated as required to supply air from the air supply port 7, and at the same time, supply air. The exhaust gas (return air) taken in from the exhaust gas inlet 8 uses the condenser 4
Exchanges heat with the circulating refrigerant to absorb or radiate heat and exhaust port 10
Exhaust from outside. In this manner, the heat exchange load of the condenser 4 can be reduced by using the exhaust heat, and the effect as if using the total heat exchanger can be obtained in the condenser 4. At this time, if the air volume is insufficient with only the exhaust, the external air is supplied to the condenser 4 by the external air damper 14 to supplement the air volume. That is, even if the amount of air required for the heat exchange of the condenser 4 becomes insufficient, the amount of air can be easily increased by the outside air damper 14, and it can widely correspond to various air conditioning conditions.

In addition, the temperature (heat load) of fresh air before heat exchange
According to the two divided evaporators 2a and 2b (refrigeration circuit 1
It is possible to easily adjust the indoor air supply temperature by appropriately switching so as to drive only one or both of 1, 1).
Moreover, the divided evaporators 2a, 2b (refrigeration circuits 11, 11)
In the operation of only one of the two refrigeration circuits 1
Since 1 and 11 are shared by one fin group, the heat transfer area becomes large and the heat exchange capacity becomes higher than the net evaporator split ratio. In the outside air cooling operation and the ventilation operation, the compressor 1
What is necessary is just to stop 2,12.

Further, this heat pump type air conditioner can perform a dehumidifying / reheating operation, and after the outside air is cooled and dehumidified by the circulating refrigerant of the windward split evaporator 2a, the dehumidified air is discharged to the leeward split evaporator 2b. The refrigerant is heated by the circulating refrigerant and supplied into the room through the air supply port 7, heat exchanges the circulating refrigerant in the condenser 4 with exhaust gas, and is exhausted from the exhaust port 10. At this time, since the fin group of the condenser 4 is shared by the two refrigeration circuits 11 and 11, not only heat exchange between the refrigerant and the outside air but also refrigerants having a larger temperature difference (heating refrigerant temperature-cooling refrigerant temperature). Heat exchange at the temperature of the refrigerant), thereby increasing the heat exchange capacity.

Although not shown in the drawings, in the above-described embodiment, the evaporator 2 is divided into one and the refrigeration circuit 11 is also divided into one.
Alternatively, an air conditioner may be configured. In addition, this air conditioner can be freely used as an outside air processing air conditioner.

[0013]

According to the first aspect of the present invention, a separate heat source for cold and hot water is not required. Since the condenser can be operated using exhaust heat from indoors, it has a high heat exchange capacity and the size of the refrigeration circuit can be reduced, saving energy. Installation space can be reduced, and equipment costs and running costs can be reduced. A single heat pump type air conditioner can perform an outside air treatment cooling / heating operation, an outside air cooling operation, and a ventilation operation, and does not require a separate air treatment air conditioner or the like. The external air intake to the air supply air passage and the external air intake to the external air air passage can be shared by one external air intake, and one duct can be used for both the external air intake duct for air supply and the external air intake duct for exhaust. In addition, the number of parts is reduced, the size and cost are reduced, and the work such as duct work is facilitated. In addition, since the duct from the indoor side can be connected to one of the opposing end surfaces of the casing and the duct from the outdoor side can be connected to the other, the duct construction is further facilitated, and it is most suitable for ceiling installation. Since the outside air passage is sandwiched between the supply air passage and the exhaust air passage, when maintaining the evaporator and condenser of the supply air passage and the exhaust air passage, the outside air ventilation passage is easy to work without disturbing. In addition, the casing can be made flat and thin, making it ideal for ceiling installation. Only the refrigeration circuit is taken out of the casing without removing the entire casing, so that the refrigerant recovery operation and maintenance can be easily performed, and installation and storage are not troublesome. Also, by replacing only the refrigeration circuit, the cost at the time of renewal can be reduced. According to the invention of claim 2, dehumidification / reheating operation can be further performed by one heat pump type air conditioner. Capability can be adjusted simply by starting and stopping an arbitrary compressor, control is easy, the control mechanism can be simplified, and energy saving operation with less failure and less waste can be performed. One refrigeration circuit can be used as a backup in the event of a failure, for example. According to the third aspect of the invention, it is possible to adjust the capacity of the evaporator while operating the compressor without waste according to the heat load of the outside air, thereby achieving energy saving. According to the fourth aspect of the present invention, even when used at a high wind speed, the pressure loss does not increase and the heat exchange capacity does not decrease, so that a small evaporator and a condenser can be used, and the external controller can be made much more compact. At normal wind speeds, pressure loss is reduced and heat exchange efficiency is improved, so that a small blower can be used and noise can be reduced.

[Brief description of the 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 simplified explanatory diagram of a refrigeration circuit.

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

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Casing 2 Evaporator 2a Divided evaporator 2b Divided evaporator 3 Blower 4 Condenser 5 Blower 6 Outside air intake 7 Supply port 8 Exhaust intake 10 Exhaust port 11 Refrigeration circuit 12 Compressor 19 Fin tube A Supply air supply path B Exhaust air path C External air path D Damper mechanism

[Procedure amendment]

[Submission date] November 19, 2001 (2001.11.
19)

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0008

[Correction method] Change

[Correction contents]

The evaporator 2 is divided at a distance into a windward split evaporator 2a and a leeward split evaporator 2b, and is divided by a condenser 4 shared with the windward split evaporator 2a and the first compressor 12. One refrigeration circuit 11 is configured, and the leeward split evaporator 2b and the second pressure
The second refrigeration circuit 11 is formed by the compressor 12 and the common condenser 4 described above.
Configure . The compressors 12, 1 of the two refrigeration circuits 11, 11
Although the capacity ratio of 2 (one of the divided evaporators: the other of the divided evaporators) is optimally set to 4: 6, other ratios may be used. Usually, when the same evaporator is used by switching between cooling (cooling) and heating (heating), the capacity required for heating is about 60% of that for cooling. Therefore, by setting the split ratio as described above, the split evaporator 2 on the windward side during heating is used.
Energy saving can be achieved simply by using only a, that is, only the compressor 12 of the one refrigeration circuit 11. The surface wind speed of the evaporator 2 is set to 3.5 to 4.0 m / s, and a small condenser 4 can be used at a high wind speed and the air conditioner can be made compact.
Is optimally set to 4.0 to 6.0 m / s, but may be in a range other than these. The fin tubes 19 of the evaporator 2 and the condenser 4 are preferably elliptical tubes (see FIG. 4), but may be circular tubes.

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) F24F 13/20 F25B 39/02 C 13/22 39/04 C 13/24 F24F 1/02 401A 13/30 401B 13/32 436 F25B 1/00 361 13/00 30/02 39/02 39/04 (72) Inventor Katsuhiro Urano 4-2-1-15, Hakuro-cho, Chuo-ku, Osaka-shi, Osaka 5th floor of Yodokou second building 5F Kimura Koki Co., Ltd. F-term (reference) 3L050 BA01 BA04 BA05 BA10 3L051 BE04 BE06 BF10

Claims (4)

[Claims] 1. An air supply port 7 and an exhaust port 8 are formed on one of the opposed end faces of the casing 1, and an outside air port 6 and an exhaust port 10 are formed on the other of the opposed end faces.
The condenser 4 and the blower 5 communicate with the exhaust inlet 8 and the exhaust port 10.
, An outside air passage C having one end communicating with the windward of the condenser 4 of the exhaust air passage B, and an evaporator 2 and a blower 3 having one end communicating with the air supply port 7. Supply air duct A
And a damper mechanism D capable of adjusting the flow rate of each of the exhaust air from the exhaust air passage B, the outside air from the outside air passage C, and the outside air from the air supply passage A. The outside air air passage C is connected to the air supply passage A and the exhaust air passage. The outside air inlet 6 extends across the other end of the outside air blowing path C and the other end of the supply air blowing path A while being adjacent in parallel so as to be sandwiched by the path B.
And a refrigeration circuit 11 having a condenser 4, an evaporator 2, and a compressor 12 is configured to be able to be taken out and stored in the casing 1. 2. An evaporator 2 is divided into a windward split evaporator 2a and a leeward split evaporator 2b, and a first refrigeration is performed by a condenser 4 shared with the windward split evaporator 2a and the first compressor 12. Circuit 11
The ceiling-mounted heat pump air conditioner according to claim 1, wherein a second refrigeration circuit (11) is constituted by a leeward split evaporator (2b), a second compressor (12) and the common condenser (4). 3. The capacity ratio of the two compressors 12, 12 is 4:
The ceiling-mounted heat pump air conditioner according to claim 2, wherein the air conditioner is set to 6. 4. A ceiling-mounted heat pump type air conditioner according to claim 1, wherein the fin tubes 19 of the evaporator 2 and the condenser 4 are elliptical tubes.