JP2002250540A - Thin heat pump type fresh air processing air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a compact thin heat pump fresh air processing air condi tioner with the low cost. SOLUTION: A casing 1 includes a supply air passage A provided on a vaporizer 2 to which fresh air is ventilated, and an exhaust air passage B on which a condenser 4 is provided to which exhaust air and fresh air are ventilated freely to adjust air amounts therefor. The supply air passage A and the exhaust air passage B are disposed, adjoining in parallel such that fan air directions are positively opposite, and that they are reduced in diameters in respective airflow directions. A fan air side fresh air intake port 6 is communicated with a diameter expansion section of the supply air passage A, and simultaneously an exhaust air intake port 8 and an exhaust side fresh air intake port 9 are communicated to a diameter expansion section of the exhaust air passage B.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a thin heat pump type outside air processing air conditioner.

[0002]

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

[0003]

[0005] Therefore, it is bulky, and the installation place is limited, and the equipment cost is high. Therefore, an object of the present invention is to provide a thin heat pump type outside air processing air conditioner which solves these problems.

[0004]

In order to achieve the above object, a thin heat pump type outside air processing air conditioner according to the present invention comprises a casing having an evaporator through which outside air is passed and an air supply / air supply passage provided with a blower. An exhaust air passage provided with a condenser and a blower through which the exhaust air and the outside air can be freely adjusted in air volume. The air supply air passage and the exhaust air passage are arranged adjacent to each other in parallel, and the air blowing directions are opposite to each other. The air supply air passage and the exhaust air passage are formed so as to decrease in diameter in each air blowing direction, and the air supply side outside air intake is communicated with the enlarged diameter portion of the air supply air passage and the exhaust air passage is formed. It made to communicate exhaust inlet and the exhaust-side outside air inlet to the expanded diameter section. Further, the casing is configured to be freely separated and connectable to a blow block having both blowers and a refrigeration block having a condenser, an evaporator and a compressor. further,
The evaporator is divided into a leeward split evaporator and a leeward split evaporator, and a first refrigeration circuit is configured with a leeward split evaporator, a first compressor and a common condenser, and a leeward split evaporator. A second refrigeration circuit was constituted by the second compressor and the common condenser.
Further, the refrigerant inlet / outlet of the leeward split evaporator and the refrigerant inlet / outlet of the leeward split evaporator are provided opposite to each other and connected to different compressors, respectively, and two common refrigerant inlets and outlets are provided in a common condenser. One refrigerant inlet / outlet is connected to the leeward split evaporator by piping, and the other refrigerant inlet / outlet is connected to the leeward split evaporator by pipes, and the connecting pipe of the leeward split evaporator and the condenser, and the leeward split evaporator and the condenser The connection pipe and the connection pipe were arranged in parallel so that the space between them was also used as an air passage. Further, the capacity ratio of the two compressors was set to 3: 7 or 4: 6. Further, the surface wind speed of the condenser 4 is set to 4.0 to 6.0 m / s.
Set to. Further, the fin tubes of the evaporator and the condenser were made elliptical tubes.

[0005]

1 to 3 show an embodiment of a thin heat pump type outside air processing air conditioner according to the present invention. This outside air conditioner includes an evaporator in which outside air is passed through a casing 1. An air supply passage A provided with a condenser 2 and an evaporator blower 3, and an exhaust fan provided with an exhaust heat recovery / condenser 4 and a condenser blower 5 through which the outside air and the exhaust from the room are respectively blown so that the air volume can be freely adjusted. The system includes a path B, and two refrigeration circuits 11 including a compressor 12, a liquid receiver, an expansion valve, a switching valve, and the like, which can be switched between cooling and heating. The casing 1 is formed with a supply-side outside air intake 6, an intake port 7, an exhaust intake 8, an exhaust-side outside air intake 9, and an exhaust port 10. The casing 1 is provided with a blower block 15 having both blowers, The condenser 4, the evaporator 2, and the refrigeration block 16 having the compressor 12 are configured to be separable and connectable. Solid and dotted outline arrows indicate the direction of air flow.

The air supply air passage A and the exhaust air passage B are arranged adjacent to each other in parallel so that the air blowing directions thereof are opposite to each other, and the air supply air passage A and the exhaust air passage B are contracted in each air blowing direction. It is formed to have a diameter. The enlarged portion of the supply air passage A is connected to the outside air intake 6 on the supply side, and the enlarged portion of the exhaust passage B is connected to the outside intake 8 and the outside air intake 9 of the exhaust side. An air supply port 7 communicates with the reduced diameter portion of the path A, and an exhaust air path B
The exhaust port 10 communicates with the reduced diameter portion. The exhaust port 8 is connected to the indoor space through a duct, a suction port, or the like, and is connected to the air supply port 7.
Is connected to the indoor space through a duct, an outlet or the like.

[0007] In the enlarged diameter portion of the exhaust air passage B, an exhaust inlet 8 is provided.
Exhaust Damper 13 for Adjusting Exhaust Air Volume from Air to Condenser 4
And an outside air damper 14 that adjusts the amount of outside air from the exhaust side outside air intake 9 to the condenser 4 to assist the amount of air blown to the condenser 4.
And are provided. Each of the dampers 13 and 14 has an air volume of 0 to 10
It is configured to be freely adjustable between 0%. A condenser 4 is provided at the reduced diameter portion of the exhaust air passage B, and a condenser blower 5 is provided at an intermediate portion of the exhaust air passage B. An evaporator 2 is provided at the enlarged diameter portion of the air supply air passage A.
Is provided, and an air blower 3 for an evaporator is provided in an intermediate portion of the air supply air passage A.

The evaporator 2 is divided into a windward split evaporator 2a and a leeward split evaporator 2b at a distance, and is divided by a condenser 4 shared with the windward split evaporator 2a and the first compressor 12. One refrigeration circuit 11 is constituted, and the second refrigeration circuit 11 is constituted by the leeward split evaporator 2b, the second compressor 12, and the common condenser 4. The refrigerant inlet / outlet 28 of the leeward split evaporator 2a and the refrigerant inlet / outlet 29 of the leeward split evaporator 2b are provided directly opposite to each other and connected to another compressor 12, and the refrigerant inlet / outlet of the common condenser 4 is made opposite. Two refrigerant inlets / outlets 30 are connected to the leeward side evaporator 2a by piping, and the other refrigerant inlet / outlet 31 is connected to the leeward side evaporator 2b by piping.
And a connection pipe 32 between the windward split evaporator 2a and the condenser 4
If, leeward side split evaporator 2b and the condenser 4 of the connection pipe 33
And are arranged in parallel so that the space between them is also used as a ventilation path.

The division ratio between the leeward side evaporator 2b and the leeward side evaporator 2a (the leeward side: the leeward side) is set, for example, such that the capacity ratio is 3: 7 or 4: 6. Is good. That is, the capacity ratio of the two compressors 12, 12 is set to 3: 7 or 4: 6. Normally, when cooling (cooling) and heating (heating) are switched and used by the same evaporator, the capacity required for heating is about 60 to 70% of that for cooling. Therefore, by setting the division ratio as described above, energy saving can be achieved by using only the divided evaporator 2a on the windward side, that is, only one refrigeration circuit 11 during heating. It is optimal to set the surface wind speed of the evaporator 2 to 3.5 to 4.0 m / s, and to set the surface wind speed of the condenser 4 to 4.0 to 6.0 m / s. It may be. 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 heat pump type outside air processing air conditioner,
The outside air taken in from the air supply side outside air inlet 6 is appropriately heat-exchanged in the evaporator 2 and the humidifier is operated as required, and the outside air is treated to supply the air from the air supply port 7 to the indoor, and at the same time the exhaust air intake The circulating refrigerant in the condenser 4 is heat-exchanged with the exhaust gas (return air) taken in from the exhaust gas 8 to absorb heat or dissipate heat and is exhausted from the exhaust port 10 to the 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 air volume is supplemented by the outside air damper 14. That is, even if the air volume required for heat exchange of the condenser 4 becomes insufficient, the air volume can be easily increased by the outside air damper 14, and
A wide range of external tone conditions can be accommodated.

Further, 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 outside air temperature of the indoor air supply by appropriately switching so as to operate only one of or both of the items (1) and (11). Moreover, the divided evaporators 2a and 2b (refrigeration circuit 11,
Even in the operation of only one of 11), since the condenser 4 shares the two refrigeration circuits 11 and 11 with one fin group, the heat transfer area is large and the heat exchange capacity is higher than the net evaporator split ratio. Get higher. Note that the compressors 12 and 12 may be stopped in the outdoor air cooling operation and the ventilation operation.

Further, the heat pump type outside air processing air conditioner can perform a dehumidification / reheating operation. After the outside air is cooled by the circulating refrigerant of the windward split evaporator 2a and dehumidified, the dehumidified air is separated from the leeward split evaporator. The refrigerant is heated by the circulating refrigerant 2b and supplied indoors from the air supply port 7 to exchange heat with the circulating refrigerant in the condenser 4 by the exhaust gas and 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.
One of them may be an external controller. In addition, this external controller can be installed not only vertically (vertically) but also horizontally (horizontally).
It can be freely configured as an installation type.

[0014]

According to the first aspect of the present invention, a separate heat source for cold and hot water is not required for treating outside air. Since the condenser can be operated using exhaust heat from indoors, it has a high heat exchange capacity and can reduce the size of the refrigeration circuit to save energy, eliminating the need for extra components such as a total heat exchanger, and It can be made compact, requires less installation space, and can reduce equipment costs and running costs. One heat pump type outside air treatment air conditioner can perform outside air treatment operation, outside air cooling operation, and ventilation operation. Air can be taken in from the enlarged portion of the air supply and exhaust air passages to reduce the wind speed and reduce the pressure loss and suction noise of the blower, resulting in low noise and easy installation near houses and the like. In addition, since the large and small diameters of the air supply passage and the exhaust air passage are alternately combined, the casing does not protrude in the adjacent direction, resulting in a thin and compact. According to the second aspect of the present invention, by separating the blocks, it is easy to carry out the manufacture and transfer to the installation location, thereby improving the workability. Refrigerant recovery work and maintenance can be easily performed, and by replacing only a single block, cost reduction during renewal can be achieved. According to the invention of claim 3, the dehumidification / reheating operation can be further performed by one heat pump type outside air processing 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 fourth aspect of the present invention, piping work for the evaporator, the condenser and the compressor is easy, and the piping distance is short, so that heat loss is small and heat exchange efficiency is good. Loss does not occur, and the blower can be downsized, and the overall external controller can be further downsized. According to the fifth 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. Claim 6
According to the invention, a small condenser can be used at a high wind speed, and the external conditioner can be made compact. According to the seventh 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 speed, 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 front view showing one 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 Split evaporator 2b Split evaporator 3 Blower 4 Condenser 5 Blower 6 Supply side outside air intake 8 Exhaust intake 9 Exhaust side outside air intake 11 Refrigeration circuit 12 Compressor 15 Blow block 16 Refrigeration block 19 Fin tube 28 Refrigerant inlet / outlet 29 Refrigerant inlet / outlet 30 Refrigerant inlet / outlet 31 Refrigerant inlet / outlet 32 Connection pipe 33 Connection pipe A

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[Procedure amendment]

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

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Claim 6

[Correction method] Change

[Correction contents]

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Katsuhiro Urano 4-2-15, Hakuro-cho, Chuo-ku, Osaka-shi, Osaka Pref.

Claims (7)

[Claims] 1. A casing 1 is provided with an air supply / air supply path A provided with an evaporator 2 and a blower 3 through which outside air is ventilated, a condenser 4 and a blower 5 through which the exhaust air and outside air are each freely adjustable. And an exhaust air passage B, and the air supply air passage A and the exhaust air passage B are arranged adjacent to each other in parallel so that the air blowing directions are opposite to each other. It is formed so as to be reduced in diameter in each air blowing direction. The expanded diameter portion of the air supply air flow path A communicates with the air supply side outside air intake 6, and the expanded diameter portion of the exhaust air flow path B communicates with the exhaust air inlet 8 and the exhaust air. A thin heat pump type outside air treatment air conditioner characterized by communicating the side outside air intake 9. 2. A casing 1 comprising: a blower block 15 having both blowers 3 and 5; a condenser 4; an evaporator 2;
2. A thin heat pump type outside air processing air conditioner according to claim 1, wherein the air conditioner is configured so as to be able to be separated and connected to a refrigeration block 16 having a cooling heat pump. 3. The evaporator 2 is divided into a windward split evaporator 2a and a leeward split evaporator 2b, and the first refrigeration is performed by the condenser 4 shared with the windward split evaporator 2a and the first compressor 12. Circuit 11
The thin heat pump type outside air treatment air conditioner according to claim 1 or 2, wherein a second refrigeration circuit (11) is constituted by a leeward split evaporator (2b), a second compressor (12) and the common condenser (4). 4. A refrigerant port 28 of the windward split evaporator 2a.
And the refrigerant inlet / outlet 29 of the leeward side split evaporator 2b is provided in the opposite direction and connected to another compressor 12 by piping. In the common condenser 4, two refrigerant inlets / outlets are provided in the opposite direction, and one of the refrigerant inlets / outlets 30 is connected. The other refrigerant inlet / outlet 31 is connected to the windward split evaporator 2a by piping to the leeward split evaporator 2b, respectively, and the connection pipe 3 between the windward split evaporator 2a and the condenser 4 is connected.
2, the connection pipe 33 between the downwind side split evaporator 2b and the condenser 4
4. The thin heat pump type outside air treatment air conditioner according to claim 3, wherein the air conditioner and the air conditioner are arranged in parallel so that the space between them is also used as an air passage. 5. The capacity ratio of the two compressors 12, 12 is 3:
The thin heat pump type outside air treatment air conditioner according to claim 3 or 4, wherein the air conditioner is set to 7 or 4: 6. 6. The surface wind speed of the condenser 4 is 4.0 to 6.0 m /
The low-noise heat pump type outside air processing air conditioner according to claim 1, wherein the air conditioner is set to s. 7. A thin heat pump type outside air treatment air conditioner according to claim 1, wherein the fin tubes 19 of the evaporator 2 and the condenser 4 are elliptical tubes.