JP4597785B2 - Heat pump air conditioner - Google Patents

Description

  The present invention relates to an outside air introduction type heat pump type air conditioner.

  In the heat pump type air conditioner of the outside air introduction type, the outside air introduced into the casing and the return air from the air-conditioned room are heat-exchanged by a total heat exchanger to recover waste heat in the return air, and further, the heat pump There is a configuration in which heat is recovered by a refrigerant circuit.

  In the total heat exchanger, since the outside air and the return air must be circulated in opposite directions, the supply side heat exchanger and the return air side heat exchanger in the heat pump refrigerant circuit are respectively connected to the supply passage and the return air. Generally, the heat exchanger is disposed so as to sandwich the total heat exchanger (see, for example, Patent Documents 1 to 3).

  By the way, when installing the air conditioner, the unit is designed and manufactured so that the unit is divided into a plurality of compact units based on the installation conditions such as the installation space and the carry-in route of the device. In many cases, it is necessary to assemble the equipment at the installation location. In particular, when the above-mentioned conditions for installation are severely restricted, such as renewal work of an existing building, unitization of the apparatus is an essential requirement.

However, in the conventional apparatus as described above, the supply air side heat exchanger and the return air side heat exchanger are provided at positions opposite to each other across the total heat exchanger. In a heat pump refrigerant circuit equipped with a heat exchanger, it is natural that the refrigerant circuit is divided into a plurality of units, and therefore installation work requires connection of refrigerant piping between the units. There is a problem that it takes time and it is difficult to maintain the construction accuracy and reliability of the refrigerant piping.
JP 61-197933 A (pages 1 to 3, FIGS. 1 to 3) JP-A-5-157282 (pages 1 to 3, FIG. 1) JP-A-7-310964 (pages 1 to 4, FIGS. 1 to 4)

  The present invention can be divided into a plurality of units, facilitates carrying-in work to the installation site, and does not require connection work of refrigerant pipes at the installation site. An object of the present invention is to provide a heat pump type air conditioner capable of improving reliability.

In order to solve the above-described problems, a heat pump air conditioner according to the present invention includes an air supply channel from an outside air inlet to an air inlet to an air-conditioned room, and a return air inlet from the air-conditioned room to an air outlet. Between the supply air flow path and the return air flow path, a total heat exchanger across the supply air flow path and the return air flow path, and the supply air side provided on the downstream side of the total heat exchanger in the supply air flow path and the return air flow path, respectively For the heat exchanger and the return air side heat exchanger, the refrigerant from the compressor is circulated in the order of the supply air side heat exchanger and the return air side heat exchanger or vice versa, thereby cooling and heating the air-conditioned room. In a heat pump type air conditioner having a refrigerant circuit that switches operation, a total heat exchanger unit in which the total heat exchanger is accommodated in one casing, constituent devices of the refrigerant circuit, and refrigerant piping between these devices Refrigerant circuit housed in one casing It has a knit, and disposing the total heat exchanger unit on the refrigerant circuit unit, configured to devices by connecting them units is completed, the total heat exchanger unit, the casing a partition plate for partitioning right and left, and perpendicular to the partition plate, is divided into four chambers of the left and right front and rear by the said total heat exchanger for partitioning back and forth in the casing, one of the left and right second chamber is a casing upper each lower provided the external air inlet port and the outside air outlet, constitutes the air intake passage upstream portion leading to the outside air outlet from the air introduction port into the refrigerant circuit unit via the total heat exchanger, also the left or right other return air two chambers respectively to the casing top and bottom provided return air outlet and the return air inlet port, leading to the return air outlet of the return air from the inlet to the refrigerant circuit unit through the total heat exchanger Configure the path upstream portion, and the supply of the external air inlet port to either one of the front and rear chambers in the air flow path side, and the outside air outlet provided on the other of the chambers same before and after, also the return air flow path of the return air inlet The position of the return air outlet is provided so that the position of the outside air inlet and the outside air outlet on the supply air flow channel side and the front and rear chambers are alternated, and the flow direction of the outside air and the flow direction of the return air with respect to the total heat exchanger are It is configured so as to be in the reverse direction.

A heat pump type air conditioner according to claim 2 of the present invention includes an air supply fan in a casing in addition to the total heat exchanger unit and the refrigerant circuit unit, and supplies air from an air supply passage in the refrigerant circuit unit. And an air supply fan unit that sends air to the air-conditioned room from the air supply port, and an exhaust fan in a casing separate from the air supply fan unit, and returns the return air from the return air flow path in the refrigerant circuit unit. An exhaust fan unit that is introduced and discharged from the exhaust port to the outside of the apparatus is configured.

  According to the present invention, at least the entire apparatus can be divided into a unit including a total heat exchanger and a unit including a refrigerant circuit, which can be manufactured, stored and transported, and can be easily carried into an installation site. Moreover, since the refrigerant circuit is housed in one unit, the refrigerant pipe connection work is unnecessary at the installation site, and the installation work can be simplified and speeded up and the reliability of the apparatus can be improved.

Embodiments of a heat pump air conditioner according to the present invention will be described below in detail based on specific examples shown in the accompanying drawings.
In the figure, reference numeral 1 denotes a total heat exchanger unit, 2 denotes a refrigerant circuit unit, 3 denotes an air supply fan unit, 4 denotes an exhaust fan unit, 5 denotes an air supply side connection unit, and 6 denotes an exhaust side connection unit. An external air inlet 7 and a return air inlet 8 are provided on the upper surface of the heat exchanger unit 1, an air inlet 9 is provided on the upper surface of the air supply fan unit 3, and an exhaust port 10 is provided on the upper surface of the exhaust fan unit 4. is doing.

  2 and 3, the total heat exchanger unit 1 includes a partition plate 12 that divides the inside of the casing 11 into left and right sides, and a partition plate 12 that is orthogonal to the partition plate and that has an air flow direction in the front-rear direction. The heat exchanger 13 is divided into four chambers, and one half (the left half in FIG. 2) of the total heat exchanger is interposed between two chambers in the left-right direction (left side in FIGS. 2 and 3). An upstream portion of the supply air flow path that constitutes the intervening return air flow path upstream portion 14 and in which the other half (right side in FIGS. 2 and 3) is interposed between the other two chambers (right side in FIG. 2) 15 is constituted.

  The return air inlet 8 is formed on the upper surface of the casing 11 of one chamber 14A (the rear chamber in FIGS. 2 and 3) in the upstream portion 14 of the return air flow path, and the other chamber 14B (the front chamber in FIGS. 2 and 3). Return air outlets 16 are respectively provided on the lower surface of the casing, and the outside air inlet 7 is provided on the upper surface of the casing 11 of one chamber 15A (the front chamber in FIGS. 2 and 3) in the upstream portion 15 of the supply air flow path. An outside air outlet 17 is provided on the lower surface of the casing of the chamber 15B (the rear chamber in FIGS. 2 and 3).

Here, the flow direction of the air in the upstream portion 14 of the return air flow channel and the upstream portion 15 of the supply air flow channel is configured so that the front-rear direction is reversed with respect to the total heat exchanger 13. The air flowing in the portion 14 and the air flowing in the air supply flow path upstream portion 15 are configured to face each other in the total heat exchanger 13.
Reference numerals 18a and 18b in FIGS. 2 and 3 respectively indicate external air and return air filters, and the external air filter has, for example, a two-stage configuration of a pre-filter and a medium performance filter.

  The refrigerant circuit unit 2 houses all the components of the heat pump refrigerant circuit and the refrigerant pipes between these devices.

  Specifically, as shown in FIG. 4, the inside of the casing 19 of the refrigerant circuit unit 2 is divided into left and right by a vertical partition plate 20, and one chamber (the left side in FIG. 4) has the return air flow channel midstream portion 21 and the other chamber. The chambers (on the right side in FIG. 4) constitute the supply air flow channel midstream portion 22, respectively, and the return air flow channel midstream portion 21 and the supply airflow flow channel midstream portion 22 have their return from the total heat exchanger unit 1 above each casing. An air inlet 23 and an outside air inlet 24 are provided, and a casing outer plate portion of each midstream portion is connected to a return air outlet 25 connected to the exhaust side connection unit 6 and an air supply side connection unit 5. The outside air outlet 26 is provided.

A return air side heat exchanger 27 and a supply air side heat exchanger 28, which are components of the heat pump refrigerant circuit, are provided inside the return air outlet 25 and the outside air outlet 26, respectively. A compressor 29 for supplying the refrigerant is provided in the return air flow path midstream portion 21.
In addition, the code | symbol 30 in FIG. 4 has shown the humidifier.

The specific configuration of the heat pump refrigerant circuit will be described with reference to FIG. 5. The refrigerant from the compressor 29 changes the supply side heat exchanger 28 and the return air side heat exchanger 27 in this order or vice versa. Thus, the four-way valve 31 is switched to be supplied and returned to the compressor via the accumulator 32, and the cooling operation and the heating operation are switched by switching the four-way valve.
The compressor 29, the four-way valve 31, and the accumulator 32 may be provided not in the return air flow path midstream portion 21 but in the supply air flow path midstream portion 22.

  Specifically, during the cooling operation, as indicated by a solid arrow in FIG. 5, the refrigerant from the compressor 29 is sent to the return air side heat exchanger 27 via the four-way valve 31, and the return air flow path midstream portion 21. The air is condensed by heat exchange with the air flowing through the air and sent to the supply air side heat exchanger 28, where it is evaporated and cooled in the air supply flow passage midstream portion 22. Then, it is sent to the accumulator 32 where it is gas-liquid separated and returned to the compressor 29.

Further, during the heating operation, as indicated by broken line arrows in FIG. 5, the refrigerant from the compressor 29 is sent to the supply air side heat exchanger 28 via the four-way valve 31, and flows through the supply flow passage midstream portion 22. The air in the air supply flow path is condensed by heat exchange with the air to be heated, and the condensed refrigerant is sent to the return air side heat exchanger 27 and evaporated to flow through the return air flow path middle section 21. The heat of the air is taken away, and then the gas and liquid are separated by the accumulator 32 and returned to the compressor 29.
In FIG. 5, reference numerals 33 and 34 denote return air side heat exchangers and expansion valves for the supply side exchanger, respectively, and 35 and 36 denote return air side heat exchangers and check valves for the supply side heat exchanger, respectively. Shows the valve.

  6 and 7 show the structures of the exhaust side connection unit 6 and the exhaust fan unit 4, and the supply side connection unit 5 and the supply fan unit 3, respectively.

  Therefore, an exhaust inlet 38 connected to the return air outlet 25 in the refrigerant circuit unit is provided on one side surface (right side in FIG. 6) of the casing 37 of the exhaust side connection unit 6 connected to the refrigerant circuit unit. The exhaust fan unit 4 is connected to the casing 39 of the exhaust fan unit 4 connected to the upper portion of the connection unit 6 and has a communication part 40 to form a return air flow path downstream part 48. Thus, the exhaust gas from the return air outlet 25 of the refrigerant circuit unit is discharged from the exhaust port 10 to the outside through the communication port 40, the exhaust fan 41 and the exhaust cylinder portion 42.

Note that a motor (not shown) for driving the exhaust fan 41 is preferably provided in the exhaust fan unit 4, and thus the exhaust fan driving power transmission mechanism can be accommodated in the exhaust fan unit.
In the present embodiment, the exhaust fan unit 4 and the exhaust side connection unit 6 are provided in independent casings, respectively, but these units may be provided in one casing.

  The air supply side connection unit 5 and the air supply fan unit 3 are also connected to the refrigerant circuit unit in the casing 43 of the air supply side connection unit 5 on the side surface (on the left side in FIG. 7) in the same manner as the exhaust side. The air supply inlet 44 connected to the outside air outlet 26 in the refrigerant circuit unit is provided, and the communication portion 45 is connected to the casing 50 of the air supply fan unit 3 connected to the upper part of the connection unit 5. The air supply flow path downstream portion 49 is configured to supply air from the outside air outlet 26 of the refrigerant circuit unit through the air supply inlet 44 to the communication portion 45, the air supply fan 46, and the The air is supplied from the air supply port 9 via the air supply cylinder portion 47, and is supplied to a required air-conditioned room by a duct connected to the air supply port.

The motor (not shown) for driving the air supply fan 46 is preferably provided in the air supply fan unit 3 in the same manner as the motor (not shown) for driving the exhaust fan 41, and thus for driving the air supply fan. The power transmission mechanism can be accommodated entirely in the air supply fan unit.
In the present embodiment, the air supply fan unit 3 and the air supply side connection unit 5 are provided in independent casings. However, in the same manner as in the exhaust side, these units are also provided in one casing. There is.

The perspective view which shows the whole structure of the Example of the apparatus which concerns on this invention. The perspective view which shows an internal structure except the casing of a total heat exchanger unit. The cross-sectional top view of a total heat exchanger unit. The longitudinal cross-sectional view which shows the internal structure of a refrigerant circuit unit. The block diagram of a heat pump refrigerant circuit. The longitudinal cross-sectional view which shows the internal structure of an exhaust fan unit and an exhaust side connection unit. The longitudinal cross-sectional view which shows the internal structure of an air supply fan unit and an air supply side connection unit.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Total heat exchanger unit 2 Refrigerant circuit unit 3 Supply air fan unit 4 Exhaust fan unit 5 Supply air side connection unit 6 Exhaust side connection unit 7 Outside air introduction port 8 Return air introduction port 9 Supply air port 10 Exhaust port 11 Casing 12 Partition Plate 13 Total heat exchanger 14 Return air flow path upstream part 15 Supply air flow path upstream part 16 Return air outlet 17 Outside air outlets 18a and 18b Filter 19 Casing 20 Vertical partition plate 21 Return air flow path midstream part 22 Supply air flow path midstream part 23 Return air Inlet 24 Outside air inlet 25 Return air outlet 26 Outside air outlet 27 Return air side heat exchanger 28 Supply air side heat exchanger 29 Compressor 30 Humidifier 31 Four-way valve 32 Accumulator 33, 34 Expansion valve 35, 36 Check valve 37 Casing 38 Exhaust inlet 39 Casing 40 Communication part 41 Exhaust fan 42 Exhaust cylinder part 43 Casing 44 Air supply inlet 45 Communication part 46 Air supply fan 7 feed cylinder section 48 instead of the air flow path downstream portion 49 air supply channel downstream portion 50 casing

Claims (2)

These supply and return air flow paths are arranged between the supply air flow path from the outside air inlet to the supply air inlet to the air-conditioned room and the return air flow path from the return air introduction to the exhaust air outlet from the air-conditioned room. A refrigerant from the compressor is supplied to the supply-side heat exchanger and the return-side heat exchanger respectively provided on the downstream side of the total heat exchanger in the supply air passage and the return air passage. In a heat pump air conditioner comprising a refrigerant circuit that switches between cooling operation and heating operation for an air-conditioned room by circulating in the order of the air supply side heat exchanger and the return air side heat exchanger or vice versa,
The has a total heat exchanger unit all the heat exchanger accommodated in a single casing, a refrigerant circuit unit the refrigerant pipe has been accommodated in a single casing between component devices and these devices of the refrigerant circuit, the total A heat exchanger unit is disposed on the refrigerant circuit unit, and the apparatus is completed by connecting these units,
The total heat exchanger unit is divided into four chambers, front, rear, left, and right, by a partition plate that partitions the inside of the casing left and right, and the total heat exchanger that is orthogonal to the partition plate and partitions the inside of the casing back and forth, one of the left and right two chambers are provided with each of the external air inlet port and the outside air outlet at the casing top and bottom, air supply path upstream extending through the total heat exchanger from the outside air introduction port to the outside air outlet to the refrigerant circuit unit The left and right two chambers are respectively provided with the return air inlet and the return air outlet at the upper and lower parts of the casing , respectively, and from the return air inlet to the refrigerant circuit unit through a total heat exchanger. the return air constitutes a return air flow path upstream portion leading to the outlet, the external air inlet port to either one of the front and rear of the chamber in the air-supply flow path side, and provided with the outside air outlet at the other of the front and rear chambers and said the Return air flow path Of the position of the return air outlet and return air inlet provided to the position and the front and rear chambers of the external air inlet port and the outside air outlet of each of the supply flow path side becomes staggered, instead of the flow direction of the outside air to the total heat exchanger A heat pump type air conditioner configured so that the flow direction of air is opposite to the front-rear direction.
In addition to the total heat exchanger unit and the refrigerant circuit unit, an air supply fan is provided in the casing, and air supply from an air supply passage in the refrigerant circuit unit is introduced and supplied to the air-conditioned room from the air supply port. An exhaust fan unit that includes an air fan unit and an exhaust fan in a casing different from the air supply fan unit, introduces return air from the return air flow path in the refrigerant circuit unit, and discharges the air from the exhaust port to the outside of the apparatus The heat pump type air conditioner according to claim 1 , comprising:

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