JP2002243201A - Low noise heat pump type outside air treating air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a low noise heat pump type outside air treating air conditioner which is compact and low in cost. SOLUTION: A casing 1 is provided with a supply air passage 20, an exhaust air supply passage 21, a chamber 24 on the inlet side, and a chamber 27 on the outlet side. The chamber 24 on the inlet side comprises an outdoor air intake 7 communicating with the supply air passage 20, and the exhaust air passage 21; a return exhaust intake 9 communicating with the supply air passage 20, and the exhaust air supply passage 21; an outside air damper 12 on the supply air side to regulate an outside air flow to an evaporator 2 of the supply air passage 20 through the outdoor air intake 7; an outside air damper 13 on the exhaust side to regulate an outside air flow to a condenser 3 of the exhaust air supply passage 21 through the outdoor air intake 7; a return air damper to regulate an air flow of return air to the evaporator 2 of the supply air passage 20 through the return exhaust intake 9; and an exhaust damper 15 to regulate an air flow of exhaust to the condenser 3 of the exhaust air supply passage 21 through the return exhaust intake 9.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a low noise 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 low-noise heat pump type outside air processing air conditioner that solves these problems.

[0004]

In order to achieve the above object, a low-noise heat pump type outside air processing air conditioner according to the present invention comprises a casing provided with an air supply passage provided with an evaporator and a condenser. An exhaust air passage, an inlet-side chamber connected and connected across the supply air inlet and the exhaust air passage inlet, and an outlet-side chamber connected and connected across the supply air outlet and the exhaust air outlet. In the inlet side chamber, an outside air inlet communicating with the air supply passage and the exhaust air passage, a return exhaust inlet communicating with the supply air passage and the exhaust air passage, and an evaporation of the supply air passage from the outside air intake. A supply-side outside air damper that regulates the amount of outside air to the exhaust device, an exhaust-side outside air damper that regulates the amount of outside air from the outside air intake to the condenser in the exhaust air passage, and an evaporator in the supply air passage from the return exhaust intake. Return air damper that adjusts the amount of return air to the An exhaust damper for adjusting the exhaust air flow from the mouth to the condenser of the exhaust air passage, was provided. Further, the casing, a blower block having a condenser blower and an evaporator blower, a refrigeration block having a condenser, an evaporator and a compressor, an inlet chamber, an outlet chamber,
It can be separated and connected freely. 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. 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. The refrigerant inlet / outlet is connected to the leeward split evaporator with the other refrigerant inlet / outlet to the leeward split evaporator, respectively, and the connecting pipe between the leeward split evaporator and the condenser and the connecting pipe between the leeward split evaporator and the condenser are connected. And are arranged in parallel so that the space between them is also used as a ventilation path. Further, the capacity ratio of the two compressors was set to 3: 7 or 4: 6. Furthermore, the surface wind speed of the condenser was set to 4.0 to 6.0 m / s. Further, the fin tubes of the evaporator and the condenser were made elliptical tubes.

[0005]

1 to 3 show an embodiment of a low-noise heat pump type outside air processing air conditioner according to the present invention. In this air conditioner, an evaporator 2 is provided in a casing 1. Air supply air passage 20 and exhaust air passage 21 provided with condenser 3
An inlet-side chamber 24 communicatively connected to the inlet and exhaust air passage inlets, an outlet-side chamber 27 communicatively connected to the air supply outlet outlet and the exhaust air outlet, and a compressor. 4. Two refrigerating circuits 11, each of which is capable of switching between cooling and heating, including a liquid receiver, an expansion valve, a switching valve, and the like. The casing 1 includes a blower block 17 having a blower 5 for the condenser and a blower 6 for the evaporator, a refrigeration block 18 having the condenser 3, the evaporator 2, and the compressor 4, an inlet side chamber 24, an outlet side chamber 27, And can be connected and disconnected freely.

[0006] The inlet side chamber 24 is provided with an air supply ventilation passage 20.
An outside air intake 7 communicating with the exhaust air passage 21 and a return exhaust intake 9 communicating with the supply air passage 20 and the exhaust air passage 21;
A supply-side outside air damper 12 for adjusting the amount of outside air from the outside air intake 7 to the evaporator 2 in the supply air passage 20, and an exhaust for adjusting the amount of outside air to the condenser 3 from the outside air intake 7 to the exhaust air passage 21. Side outside air damper 13 and a return air damper 14 for adjusting the amount of return air from the return exhaust inlet 9 to the evaporator 2 in the supply air passage 20.
And an exhaust damper 15 for adjusting the amount of exhaust air from the return exhaust inlet 9 to the condenser 3 in the exhaust air passage 21. Each of the dampers 12, 13, 14, 15 is configured so that the air volume can be adjusted between 0% and 100%.

The air supply air passage 20 and the exhaust air passage 21 are arranged in parallel, and the inlet side chamber 24 and the communication port 22 of the air supply air passage 20 are connected.
And the communication port 23 between the inlet side chamber 24 and the exhaust air passage 21
, The outside air inlet 7 and the return exhaust inlet 9 are staggered with respect to each other, and are arranged in a staggered manner. In the outlet side chamber 27, the air supply opening 8 communicating with the air supply air passage 20 and the exhaust air passage 21 are arranged. An exhaust port 10 communicating with the exhaust port 10 is provided, and an outlet chamber 27 and a communication port 25 of the air supply air passage 20 and an air supply port 8 are provided in a staggered manner so as to be shifted from each other.
The communication port 26 and the exhaust port 10 are staggered from each other. Thereby, the airflow path can be bent to reflect the noise and the airflow distance can be increased to greatly attenuate the noise energy. The exhaust port 9 is connected to the room through a duct or a suction port, and the air supply port 8 is connected to the room through a duct or an outlet.

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 3 shared with the windward split evaporator 2a and the first compressor 4. One refrigeration circuit 11 is configured, and the second refrigeration circuit 11 is configured by the downwind side split evaporator 2 b, the second compressor 4, and the common condenser 3. The refrigerant inlet / outlet 28 of the windward 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 4, 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.

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 4, 4 is set to 3: 7 or 4: 6. Usually cooled by the same evaporator (cooling)
When switching and heating (heating) are used, 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. The surface wind speed of the evaporator 2 is optimally set to 3.5 to 4.0 m / s, and the surface wind speed of the condenser 3 is optimally set to 4.0 to 6.0 m / s. It may be. The fin tubes 19 of the evaporator 2 and the condenser 3 are preferably elliptical tubes (see FIG. 4), but may be circular tubes.

In this low-noise heat pump type outside air processing air conditioner, the outside air taken in from the outside air intake 7 is appropriately heat-exchanged by the evaporator 2 and the humidifier is operated as required to process the outside air and supply air. Air is supplied indoors from the exhaust port 8, and at the same time, the circulating refrigerant in the condenser 3 is heat-exchanged by exhaust gas (return air) taken in from the exhaust gas inlet 9 to absorb heat or dissipate heat and exhausted to the outside from the exhaust port 10. In this manner, the heat exchange load of the condenser 3 can be reduced by using the exhaust heat, and the effect as if using the total heat exchanger can be obtained only by the condenser 3. At this time, if the air volume is insufficient with only the exhaust air, the air volume is supplemented by the exhaust-side external air damper 13. The evaporator 2 can perform an auxiliary operation of cooling and heating. For example, in a warm-up operation or a night-time cooling and warming operation, the return air damper 14 is opened to circulate the return air. And the exhaust air volume is appropriately adjusted from zero percent to a predetermined percent.

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 3 shares the two refrigeration circuits 11 and 11 with one fin group, the heat transfer area is increased and the heat exchange capacity is higher than the net evaporator split ratio. Get higher. Note that the compressors 4 and 4 may be stopped in the outdoor air cooling operation and the ventilation operation.

Further, the low-noise heat pump type outside air processing air conditioner can perform a dehumidifying / reheating operation. The refrigerant is heated by the circulating refrigerant of the divided evaporator 2b and supplied indoors through the air supply port 8, heat exchanges the circulating refrigerant of the condenser 3 with exhaust gas, and exhausted from the exhaust port 10. At this time, since the fin group of the condenser 3 is shared by the two refrigeration circuits 11 and 11, not only the heat exchange between the refrigerant and the outside air, but also the 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.

[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 low-noise heat pump type outside air treatment air conditioner can perform outside air treatment operation, outside air cooling operation, ventilation operation, warm-up operation by return air circulation, indoor cooling and warming at night, and auxiliary heating and cooling operation at peak temperature. Since the chamber is provided so as to close the noise outlet of the air supply / exhaust air passage, the noise is low, and it can be easily installed near the residence. According to the second aspect of the present invention, manufacturing and carrying into the installation location are facilitated, and workability can be improved. Separation into each block facilitates refrigerant recovery work and maintenance, and replacement of only a single block can reduce costs during renewal. In the invention of claim 3, the dehumidification / reheating operation can be further performed by one low-noise 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. 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 Divided evaporator 2b Divided evaporator 3 Condenser 4 Compressor 5 Blower 6 Blower 7 Outside air intake 9 Return exhaust intake 12 Supply air outside damper 13 Exhaust outside air damper 14 Return air damper 15 Exhaust damper 17 Blast block 18 Refrigeration block 19 Fin tube 20 Supply air supply path 21 Exhaust air supply path 24 Inlet side chamber 27 Outlet side chamber 28 Refrigerant port 29 Refrigerant port 30 Refrigerant port 31 Refrigerant port 32 Connection pipe 33 Connection pipe

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

Claims (7)

[Claims] An air supply passage provided with an evaporator in the casing, an exhaust air passage provided with a condenser, an inlet of an air supply passage and an inlet of an exhaust air passage are connected to the casing. The inlet side chamber 24 and an outlet side chamber 27 communicatively connected across the air supply air outlet and the exhaust air outlet.
An outside air inlet 7 communicating with the inlet air passage 20 and the exhaust air passage 21, a return exhaust inlet 9 communicating with the inlet air passage 20 and the exhaust air passage 21, A supply-side outside air damper 12 for adjusting the amount of outside air from the outside air intake 7 to the evaporator 2 in the supply air passage 20, and an exhaust for adjusting the amount of outside air to the condenser 3 from the outside air intake 7 to the exhaust air passage 21. Side outside air damper 13 and return air intake 9
Return air damper 14 for adjusting the amount of return air to evaporator 2
A low-noise heat pump type outside air processing air conditioner, comprising: a return exhaust inlet 9 and an exhaust damper 15 for adjusting an exhaust air volume from the return exhaust inlet 9 to the condenser 3 in the exhaust air passage 21. 2. A casing 1 comprising: a blower block 17 having a condenser blower 5 and an evaporator blower 6; a refrigeration block 18 having a condenser 3, an evaporator 2 and a compressor 4;
2. The low-noise heat pump type outside air processing air conditioner according to claim 1, wherein the air chamber is configured to be freely connected to and separated from the inlet chamber 24 and the outlet chamber 27. 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 3 shared with the windward split evaporator 2a and the first compressor 4. 3. The low-noise heat pump type outside air treatment according to claim 1 or 2, wherein the second refrigeration circuit (11) comprises a circuit (11), the leeward split evaporator (2b), the second compressor (4) and the common condenser (3). air conditioner. 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 a different compressor 4 by a pipe. 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
4. The low-noise heat pump type outside air processing 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 a ventilation path. 5. The low-noise heat pump type outside air processing air conditioner according to claim 3, wherein the capacity ratio of the two compressors is set to 3: 7 or 4: 6. 6. The surface wind speed of the condenser 3 is 4.0-6.0 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. The low-noise heat pump type outside air treatment air conditioner according to claim 1, wherein the fin tubes 19 of the evaporator 2 and the condenser 3 are elliptical tubes.