JP2002267202A - Air-cooling heat pump type air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an air cooling heat pump type air conditioner which is compact and low cost. SOLUTION: A casing 1 is provided with a return/exhaust air distribution passage A for making indoor return/exhaust air to pass therethrough, a supply air distribution passage B which is provided with an evaporator 2, for permitting outside air and the return/exhaust air from the passage A to individually pass therethrough, with the air volume being controlled freely, and an exhaust air distribution passage C which is provided with a condenser 3, for permitting outside air and the return/exhaust air from the passage A to individually pass therethrough with the air volume being controlled freely. By setting the passage A to be sandwiched between the passage B and the passage C, they are juxtaposed to each other to form the casing 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an air-cooled heat pump air conditioner.

[0002]

2. Description of the Related Art In a conventional heat pump type air conditioner, when air supply / exhaust, outside air cooling, and outside air processing are performed, an outside air processing air conditioner and the like are separately required.

[0003]

Therefore, there has been a problem that it is bulky and there is a limit in an installation place, and equipment and running costs are high. Then, it aims at providing the air-cooled heat pump type air conditioner which solves these problems.

[0004]

In order to achieve the above object, an air-cooled heat pump type air conditioner according to the present invention comprises: a casing; Exhaust air supply path provided with an evaporator through which return air from the path is freely adjustable in air volume, and exhaust air provided with a condenser through which return air from outside air and return exhaust air flow path are respectively adjustable in air flow And a ventilation path, and a casing is formed by adjoining the return exhaust ventilation path in parallel so as to be sandwiched between the supply air ventilation path and the exhaust ventilation path. Further, a blower is provided in each of the supply air supply passage and the exhaust air supply passage, and the casing is configured to be capable of being separated and connected to a blower block having a blower and a refrigeration block having a condenser, an evaporator, and a compressor. Further, one or both of the air supply blower and the exhaust blower were arranged outside the casing, and were connected to the casing via a duct. 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 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 4: 6. Further, the fin tubes of the evaporator and the condenser were made elliptical tubes.

[0005]

1 to 3 show one embodiment of a heat pump type air conditioner according to the present invention.
A supply air supply passage provided with a casing 1 provided with a return exhaust air passage A through which return exhaust from the room is ventilated, and an evaporator 2 through which return air from the outside air and the return exhaust air from the return exhaust air passage A are freely adjustable. B, an exhaust air passage C provided with a condenser 3 through which the outside air and the return exhaust air from the return exhaust air passage A are respectively flown so that the air volume can be freely adjusted;
The condenser 3 includes a condenser 3, an evaporator 2, a compressor 7, a liquid receiver, an expansion valve, a switching valve, and the like, and includes a condenser 3 and a refrigeration circuit 12 capable of switching between heat absorption and heat radiation of the evaporator 2. Solid and dotted outline arrows indicate the direction of air flow.

[0006] The casing 1 has a return exhaust inlet 13 for both return air intake and exhaust intake communicating with the inlet of the return exhaust air passage A.
And an air supply port 14 and an air supply side outside air inlet 16 communicating with an inlet and outlet of the air supply air passage B, and an exhaust port 15 and an exhaust side outside air intake 17 communicating with the air inlet and outlet of the exhaust air path C, respectively. The blowers 4 and 5 are provided in the supply air passage B and the exhaust air passage C, respectively, and the casing 1 includes the blower block 6 having both the blowers 4 and 5, the condenser 3, the evaporator 2, and the compressor 7. The refrigeration block 8 and the refrigeration block 8 can be separated and connected freely.

The casing 1 is formed by adjoining the return exhaust air passage A in parallel with the supply air passage B and the exhaust air passage C so as to be sandwiched between the return exhaust air passage A and the supply exhaust air passage B and the exhaust air passage. The passages C are communicated with each other such that the air blowing directions of the passages C are opposite to each other, and the return exhaust inlet 13 is provided at each end of the return exhaust air passage A, the air supply air passage B, and the exhaust air passage C on the opposite side of the communication portion. ,
The air supply port 14 and the exhaust port 15 are communicated with each other, and the ducts communicating with the return exhaust air passage A and the air supply air passage B are concentrated on one side of the casing 1 to facilitate construction. The exhaust inlet 13 is connected to the indoor through a duct, a suction port, and the like,
The air supply port 14 is connected to the indoor through a duct, an outlet, or the like, and is air-conditioned.

The evaporator 2 is provided downstream of a communication portion between the return exhaust air passage A and the air supply air passage B and the air inlet 16 on the air supply side.
A humidifier is provided downstream of the evaporator 2. The condenser 3 is provided downstream of the communicating portion between the return exhaust air passage A and the exhaust air passage C and the exhaust-side outside air inlet 17.
An exhaust damper 18 for adjusting the amount of return exhaust air to the condenser, an exhaust-side outside air damper 20 for adjusting the amount of external air from the exhaust-side outside air intake 17 to the condenser 3, and a return exhaust from the return-exhaust intake 13 to the evaporator 2. A return air damper 21 for adjusting the air flow, and a supply-side external air damper 22 for adjusting the external air flow from the supply-side outside air intake 16 to the evaporator 2 are provided. Each of these dampers 18,
20, 21 and 22 are configured such that the air volume can be freely adjusted between 0 and 100%.

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 3 shared with the windward split evaporator 2a and the first compressor 7. One refrigeration circuit 12 is constituted, and the second refrigeration circuit 12 is constituted by the leeward split evaporator 2b, the second compressor 7, and the common condenser 3 described above. 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 opposite to each other and connected to another compressor 7 respectively. Two refrigerant inlets / outlets 30 are connected to the leeward side evaporator 2a, and the other refrigerant inlet / outlet 31 is connected to the leeward side evaporator 2b, respectively, and a connection pipe 32 between the leeward side evaporator 2a and the condenser 3 is provided. And the leeward side split evaporator 2b and the connection pipe 33 of the condenser 3 are arranged in parallel so that the space between them serves also as an air passage.

[0010] The compressors 7, 7 of the two refrigeration circuits 12, 12
(Downward split evaporator 2b: Upwind split evaporator 2a)
Is optimally set to 4: 6, but other ratios may be used. Usually, when the same evaporator is used by switching between cooling and heating, the capacity required for heating is about 60% of that during cooling. Therefore, by setting the division ratio as described above, energy saving can be achieved only by using only the divided evaporator 2a on the windward side, that is, only the compressor 7 of the one refrigeration circuit 12 during heating. The surface wind speed of the evaporator 2 is 3.5 to
It was set to 4.0 m / s, and the surface wind speed of the condenser 3 was 4.0 to 4.0.
Although it is optimal to set it to 6.0 m / s, it may be other range. The fin tubes 19 of the evaporator 2 and the condenser 3 are preferably elliptical tubes (see FIG. 4), but may be circular tubes.

An operation example using the heat pump type air conditioner will be described. Cooling / heating operation Exhaust damper 18, Exhaust side outside air damper 20, Return air damper 2
1. Opening the supply-side outside air damper 22, the return exhaust gas is diverted from the return exhaust inlet 13 to the supply air passage B and the exhaust air passage C by the return air damper 21 and the exhaust damper 18, and the divided exhaust gas is returned. One of them is mixed with outside air from a supply side outside air intake 16 at a predetermined ratio in a supply air blowing path B, and the mixture is heat-exchanged with the circulating refrigerant of the evaporator 2 to cool air or warm air to supply air to the air supply port 14. From the outside air intake 17 at a predetermined ratio in the exhaust air passage C, and the outside air temperature is reduced during cooling and increased during heating, and condensed. The circulating refrigerant in the heat exchanger 3 exchanges heat to absorb or radiate heat, and the exhaust port 1
Exhaust from 5 to the outside. In this way, the heat exchange load of the condenser 3 can be reduced by utilizing the exhaust heat, and the effect as if using the total heat exchanger can be obtained in the condenser 3. In addition, the temperature can be adjusted by appropriately switching only one or both of the two split evaporators 2a and 2b (refrigeration circuits 12 and 12) according to the indoor heat load. At this time, the divided evaporators 2a and 2b (refrigeration circuit 1)
Even in the operation of only one of the two evaporators, the condenser 3 shares the two refrigeration circuits 12 and 12 with one fin group, so that the heat transfer area is large and the heat exchange capacity is net. Higher than. When humidifying during heating, the humidifier is also operated to supply humidified warm air into the room and perform heating.
In the warm-up operation and the cold / warming operation at night, the return air damper 21 is opened to circulate the return exhaust, and the external air flow and the return exhaust air flow are appropriately reduced from zero to a predetermined percentage by the supply-side external air damper 22 and the exhaust damper 18. adjust.

Outside air cooling operation When the outside air cooling operation is performed, the compressors 7 and 7 (refrigeration circuit 12 and
12) is stopped, and the exhaust damper 18 and the external air damper 2 on the air supply side are stopped.
2. The return air damper 21 is opened, return air is diverted from the return exhaust inlet 13 to the supply air passage B and the exhaust air passage C by the return air damper 21 and the exhaust damper 18, and one of the divided return exhaust is discharged. In the air supply air passage B, the air is mixed with the outside air from the air supply side outside air intake 16 at a predetermined ratio, supplied to the room through the air supply opening 14 and cooled, and the other of the diversion return air is discharged from the exhaust opening 15 to the outside. Exhaust to In addition, the return air damper 21 is closed, only the air supply side outside air damper 22 and the exhaust damper 18 are opened, and the outside air from the air supply side outside air intake 16 is supplied into the room from the air supply port 14 to cool the room, and the return air is exhausted. The return exhaust gas from the intake 13 can be exhausted from the exhaust port 15.

Ventilation operation When performing ventilation operation, the compressors 7, 7 (refrigeration circuits 12, 1
2) is stopped, and the supply side outside air damper 22 and the exhaust damper 18 are stopped.
Only, the outside air from the supply side outside air intake 16 is supplied to the room through the supply port 14, and the return exhaust gas from the return exhaust intake 13 is exhausted from the exhaust port 15.

Dehumidification / Reheating Operation When the dehumidification / reheating operation is performed, the exhaust damper 18, the exhaust side outside air damper 20, the return air damper 21, and the supply side outside air damper 22 are opened, and the outside air from the supply side outside air intake 16 is opened. The return exhaust gas from the return exhaust inlet 13 is cooled and dehumidified by the circulating refrigerant of the leeward split evaporator 2a, and the dehumidified air is heated by the circulating refrigerant of the leeward split evaporator 2b to supply air. Air is supplied into the room through the port 14, and the refrigerant circulating in the condenser 3 is heat-exchanged by the outside air from the exhaust side outside air inlet 17 and the diverted exhaust gas from the return exhaust gas inlet 13, and is exhausted from the exhaust port 15. At this time, since the fin group of the condenser 3 is shared by the two refrigeration circuits 12, 12, 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 can also be performed, and the heat exchange capacity is increased.

FIG. 5 shows another embodiment. In the above-described embodiment, one or both of the air supply fan 4 and the exhaust fan 5 are arranged outside the casing 1 and are connected to the casing 1 via a duct. In the illustrated example, the air blower 4 in the air supply air passage B is omitted, and an air supply unit including the air supply air blower 4 is disposed outside the casing 1 to supply air through a duct. It is communicatively connected to the air passage B. Furthermore, the exhaust blower 5 of the exhaust blower C may be omitted, and an exhaust unit including the exhaust blower 5 may be disposed outside the casing 1 and connected to the exhaust blower C through a duct. (Not shown).

Although not shown in the drawings, in the above-described embodiment, the air conditioner may be configured with one evaporator 2 without being divided and one refrigeration circuit 12 and one compressor 7. Also, any of the dampers 18, 20, 21, 22 may be omitted. Further, the air conditioner may be configured not only in a vertical (vertical direction) installation type but also in a horizontal (horizontal direction) installation type. Further, the present air conditioner can be freely used as an outside air processing air conditioner.

[0017]

According to the first aspect of the present invention, the return air blowing to the supply air blowing path and the exhaust air blowing to the exhaust air blowing path are shared by the return air blowing path, so that the casing can be made thin and compact.
In addition, the ventilation distance is long, the noise energy is greatly attenuated, the noise is low, and the device can be easily installed near houses. Return air intake and exhaust intake can be shared by one return exhaust intake, and one duct can be used for both return air intake duct and exhaust intake duct, reducing the number of parts and achieving compactness and cost reduction. Construction such as duct construction becomes easy. The return exhaust air path is sandwiched between the supply air path and the exhaust air path, so when maintaining the evaporator and condenser of the supply air path and the exhaust air path, the return exhaust air path is Cheap. 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. Exhaust heat can be efficiently exchanged using the exhaust heat in the condenser, eliminating the need for extra components such as a total heat exchanger, making the air conditioner more compact, requiring less installation space, and reducing equipment and running costs. Can be reduced. 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 third aspect of the present invention, the casing can be made more compact and the noise can be reduced. According to the invention of claim 4, the dehumidification / reheating operation can be further performed by one air-cooled heat pump 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. Claim 5
According to the invention, the piping work of the evaporator, the condenser and the compressor is easy to perform, and the piping distance is short, so that the heat loss is small and the heat exchange efficiency is good, and the pressure passes because the wind passes between the piping. Without this, it is possible to reduce the size of the blower and further downsize the entire air conditioner. According to the sixth 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, thereby achieving energy saving. 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. 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.

FIG. 5 is a simplified configuration diagram showing another embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Casing 2 Evaporator 2a Split evaporator 2b Split evaporator 3 Condenser 4 Blower 5 Blower 6 Blow block 7 Compressor 8 Freezing block 12 Refrigeration circuit 19 Fin tube 28 Refrigerant port 29 Refrigerant port 30 Refrigerant port 31 Refrigerant port 32 Connection pipe 33 Connection piping A Return exhaust air path B Air supply air path C Exhaust air path

Claims (7)

[Claims] 1. A casing 1 is provided with a return-exhaust air passage A through which return-exhaust air from inside is ventilated, and an evaporator 2 through which return air from the outside air and the return-exhaust air from the return-exhaust air passage A are respectively adjustable in air volume. And an exhaust air passage C provided with a condenser 3 through which the outside air and the return exhaust air from the return exhaust air passage A are passed in such a manner that the air flow can be freely adjusted. Pneumatic airway B
An air-cooled heat pump type air conditioner characterized in that a casing 1 is formed adjacently in parallel so as to be sandwiched by an exhaust air passage C and a casing 1. 2. A blower 4, 5 is provided in each of a supply air blow path B and an exhaust blow path C, and a casing 1 includes a blower block 6 having both blowers 4, 5, a condenser 3, an evaporator 2, and a compressor. The air-cooled heat pump type air conditioner according to claim 1, wherein the air-cooled heat pump type air conditioner is configured to be freely connected to and separated from a refrigeration block (8). 3. An air-cooled heat pump air conditioner according to claim 1, wherein one or both of the air supply blower 4 and the exhaust blower 5 are arranged outside the casing 1 and connected to the casing 1 via a duct. . 4. 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 3 shared with the windward split evaporator 2a and the first compressor 7. 4. The air-cooled heat pump air conditioner according to claim 1, wherein the second refrigeration circuit is constituted by a circuit 12 and a leeward split evaporator 2b, the second compressor 7, and the common condenser 3. . 5. 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 a different compressor 7 by piping. In the common condenser 3, two refrigerant inlet / outlet ports are provided in the opposite direction, and one refrigerant inlet / outlet 30 The other refrigerant inlet / outlet 31 is connected to the leeward split evaporator 2a by piping to the leeward split evaporator 2b, respectively, and the connecting pipe 3 of the leeward split evaporator 2a and the condenser 3 is connected.
2, the connecting pipe 33 between the downwind side split evaporator 2b and the condenser 3
The air-cooled heat pump type air conditioner according to claim 4, wherein the air cooling heat pump type air conditioner is configured so that the air flow path is also used as an air passage. 6. The air-cooled heat pump air conditioner according to claim 4, wherein the capacity ratio of the two compressors is set to 4: 6. 7. The air-cooled heat pump air conditioner according to claim 1, wherein the fin tubes 19 of the evaporator 2 and the condenser 3 are elliptical tubes.