JP2008202889A - Engine-driven heat pump - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve reliability against freezing of a drain pan and a drain passage for collecting condensate water and discharging the same to the outside of a machine in an engine-driven heat pump. <P>SOLUTION: In this engine-driven heat pump 1 where a machine chamber 20 in which an engine 22 and a compressor are disposed, and a heat exchange chamber 10 in which an outdoor heat exchanger 11 is disposed, are vertically partitioned by a partitioning wall, and a condensate water pan 16 exclusively used for the outdoor heat exchanger 11, is disposed, the drain passages 17, 18 passing through the machine chamber 20 are formed downward from the condensate water pan 16. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an engine-driven heat pump drainage structure in which an equipment room in which an engine and a compressor are arranged and a heat exchange room in which an outdoor heat exchanger is arranged are vertically divided by a partition wall and a condensate pan dedicated to the outdoor heat exchanger is provided. Regarding technology.

2. Description of the Related Art Conventionally, an engine-driven heat pump that is one of air conditioners and has a configuration in which a compressor is driven by an engine is known.
In addition, in an air conditioner, it is known to provide an outdoor heat exchanger drain pan in a heat exchange chamber in which an outdoor heat exchanger is installed. When the outdoor heat exchanger acts as an evaporator, the temperature becomes low, so moisture in the air is condensed on the surface of the heat exchanger. The condensed water droplets flow out as water from the heat exchanger. The drain pan has a dish shape that receives the generated water.
A drainage passage provided in the drain pan is also known for draining the condensed water collected by the drain pan to the outside of the apparatus.
For example, Patent Document 1 discloses a drain pan for an outdoor heat exchanger and a drainage passage for discharging condensed water collected by the drain pan in an outdoor unit of an air conditioner.
JP 2002-31378 A

However, when the air conditioner is used in a cold region, the outdoor air temperature may become below freezing in the winter, and the drainage passage installed in the outdoor heat exchanger may be frozen. In this case, since the condensed water is prevented from draining from the drainage passage, it overflows into the drain pan and causes rust.
Therefore, the problem to be solved is to improve the reliability against freezing in the drain pan and the drainage passage.

  The problem to be solved by the present invention is as described above. Next, means for solving the problem will be described.

  That is, in claim 1, an engine-driven type in which an equipment room in which an engine and a compressor are arranged and a heat exchange room in which an outdoor heat exchanger is arranged are divided vertically by a partition wall, and a condensate pan dedicated to the outdoor heat exchanger is provided. In the heat pump, a drainage passage passing through the device room is provided downward from the condensed water pan.

  In claim 2, the engine-driven heat pump according to claim 1, wherein both ends of the outdoor heat exchanger in the width direction are configured such that bottom surfaces thereof are in contact with the condensed water pan, and between the both ends, A space is provided between the bottom surface and the condensed water pan.

  According to a third aspect of the present invention, in the engine-driven heat pump of the second aspect, an elastic member for supporting the outdoor heat exchanger is intermittently installed in a gap between the bottom surface of the outdoor heat exchanger and the condensed water pan. is there.

  According to a fourth aspect of the present invention, in the engine-driven heat pump of the third aspect, the elastic member is a rubber material.

  According to a fifth aspect of the present invention, in the engine-driven heat pump of the fourth aspect, a gap is provided between the elastic member and the wall surface of the condensed water pan.

  According to claim 6, in the engine-driven heat pump according to claim 5, the elastic member is configured in an L shape in a side view, and the outer surface of the elastic member is brought into contact with the inner wall surface on one side of the condensed water pan, The bottom surface and the front surface or the back surface of the outdoor heat exchanger are brought into contact with the inner contact portion of the elastic member.

  As effects of the present invention, the following effects can be obtained.

  According to the first aspect, it is possible to prevent the condensed water from freezing in the drainage passage by the heat radiation from the engine. Even if the engine is frozen while the engine is stopped, it can be thawed if the engine operation is resumed. In addition, by providing a condensate pan dedicated to outdoor heat exchange, the entire partition wall (conventional drain pan) can be made as a rust preventive member such as stainless steel, and a more effective rust preventive coating can be avoided. It is possible to prevent the generation of rust due to condensed water by improving the function of

  In claim 2, in addition to the effect of claim 1, by providing a gap between the bottom surface of the outdoor heat exchanger and the condensed water pan, drainage from the condensed water pan is improved.

  According to the third aspect, in addition to the effect of the second aspect, the deflection of the outdoor heat exchanger can be prevented. Moreover, since it is elastic support, generation | occurrence | production of the excessive stress by reaction force can be prevented with respect to the outdoor heat exchanger by a support member.

  In addition to the effect of Claim 3, since it supports with an insulating member, it can prevent that an outdoor heat exchanger is eroded.

  According to the fifth aspect, in addition to the effect of the fourth aspect, since the elastic member does not hinder the water flow of the condensed water pan, it is possible to prevent the drainage of the condensed water pan from being lowered due to the elastic member installation.

  In the sixth aspect, in addition to the effect of the fifth aspect, the elastic member is brought into contact with one side wall surface of the condensed water pan, so that the elastic member can be easily positioned. Furthermore, by providing the contact portion of the outdoor heat exchanger configuration on the contact surface side with the pan wall surface, it is easy to place and position the outdoor heat exchanger on the elastic member.

Next, embodiments of the invention will be described.
FIG. 1 is a side view showing an overall configuration of an engine-driven heat pump according to an embodiment of the present invention, FIG. 2 is a perspective view showing a drain pan for an outdoor heat exchanger, and FIG. 3 is a perspective view showing a drain passage. .
4 is a perspective view showing another drainage passage, FIG. 5 is a cross-sectional view showing the AA ′ cross-section in FIG. 4, and FIG. 6 is a side view showing the support structure of the outdoor heat exchanger.
7 is a perspective view, FIG. 8 is a perspective view showing the shape of the elastic member, and FIG. 9 is a partial cross-sectional view showing the arrangement of the elastic member.

First, an engine-driven heat pump 1 that is an embodiment of the present invention will be briefly described with reference to FIG.
As shown in FIG. 1, the engine-driven pump heat pump 1 is composed of two device chambers 10 and 20 that are divided vertically. The upper device chamber is a heat exchange chamber 10, and the lower device chamber is an equipment chamber 20.
The heat exchange chamber 10 is a chamber configured to allow outside air to flow for heat exchange of the outdoor heat exchanger 11. In the heat exchange chamber 10, an outdoor heat exchanger 11, a radiator (not shown), an outdoor fan 12, and an outdoor fan motor 13 are arranged. The outdoor heat exchanger 11 is disposed on the front surface and the back surface of the heat exchange chamber 10. The outdoor fan 12 sucks outside air from the front and the back, exchanges heat with the outdoor heat exchanger 11, and blows it out to the top. With this ventilation structure, the radiator (not shown) is also heat-exchanged. In addition, this ventilation structure is a structure of the format called the top blowing type | mold often used for a large sized air conditioning apparatus.

  On the other hand, the equipment room 20 is a substantially hermetically sealed device room that communicates with the outside only through a ventilation port (not shown), an engine intake pipe (not shown), and an exhaust pipe (not shown). The equipment room 20 is configured to be covered with an outer plate 25 around the side surface. Furthermore, main devices of the engine-driven heat pump 1 such as an engine system device, a refrigerant circuit device, and an electrical component box (not shown) are arranged inside the device room 20. As the engine system equipment, the engine 22 and its peripheral components are arranged. As the refrigerant circuit device, a compressor (not shown), a receiver (not shown), and the like are arranged.

The drain pan 15 will be described in detail with reference to FIG.
In FIG. 2, the internal devices of the heat exchange chamber 10 and the device chamber 20 and the outer plate 25 are omitted for easy understanding. Moreover, the outdoor heat exchanger 11 is illustrated by a broken line.
As shown in FIG. 2, the drain pan 15 is formed as a partition wall between the heat exchange chamber 10 and the equipment chamber 20 on the bottom surface of the heat exchange chamber 10. The drain pan 15 plays a role of collecting rainwater that has entered the heat exchange chamber 10 and discharging it to the outside. The drainage configuration of the drain pan 15 will not be described in this embodiment.
On the other hand, the condensed water pan 16 is installed on the drain pan 15 on the bottom surface of the heat exchange chamber 10 separately from the drain pan 15, and the outdoor heat exchanger 11 is installed on the condensed water pan 16. The condensed water pan 16 is formed in a box shape having side walls around it. The condensed water pan 16 is formed of an elongated body having substantially the same length as the longitudinal direction of the equipment chamber 20. Furthermore, the area of the bottom surface of the condensate pan 16 (the bottom surface of the tray) is formed so as to leave a margin around the area of the bottom surface of the outdoor heat exchanger 11. That is, the opening bottom area of the condensed water pan 16 is slightly larger than the area of the bottom surface of the outdoor heat exchanger 11. The condensed water pan 16 is formed of a rust preventive member or a member that has been sufficiently subjected to rust preventive coating.

By adopting such a configuration, the following effects can be obtained.
Conventionally, it is necessary to drain condensed water which is condensed water when the outdoor heat exchanger 11 acts as an evaporator and rainwater which has entered from the outside from the heat exchange chamber 10. Therefore, by providing the condensed water pan 16 and the drain pan 15 in the heat exchange chamber 10, the condensed water is collected in the condensed water pan 16 and the rain water is collected in the drain pan 15.
In this manner, the condensed water of the outdoor heat exchanger 11 that frequently occurs in the winter in the heat exchange chamber 10 regardless of the weather can be drained by the dedicated drain pan (condensate water pan 16). Therefore, the drainage efficiency of the heat exchange chamber 10 as a whole can be improved.
Further, by providing the condensate water pan 16 separately from the drain pan 15, the drain pan 15 can prevent the occurrence of rust due to the condensate water with the minimum necessary rust preventive coating only for rainwater. Since the drain pan 15 has substantially the entire area of the bottom of the heat exchange chamber 10, the cost of parts can be greatly reduced as compared with the case where the drain pan 15 is formed of a rust preventive member or when a sufficient rust preventive coating is applied.

Here, the drainage passage 17 will be described in detail with reference to FIG. In FIG. 3, for the sake of easy understanding, the internal devices in the device room 20 are not shown except for the engine 22. Further, it is shown with the outer plate 25 removed.
As shown in FIG. 3, for example, two drain passages 17 are arranged in one condensed water pan 16, that is, four in one engine-driven heat pump 1. The drainage passage 17 is a passage for draining the condensed water collected by the condensed water pan 16 to the outside of the engine-driven heat pump 1. The drainage passage 17 constitutes a passage that passes through the equipment room 20 from the bottom surface of the condensed water pan 16, passes through the bottom surface of the equipment room 20, that is, the bottom surface of the engine-driven heat pump 1, and reaches the outside of the machine. The drainage passage 17 is formed of a rust preventive member like the condensed water pan 16.

With such a configuration, the condensed water collected by the condensed water pan 16 quickly passes through the drainage passage 17 and is discharged out of the engine-driven heat pump 1.
The effect will be described in detail below.
In the engine-driven heat pump 1, condensed water frequently adheres to the outdoor heat exchanger 11 during heating operation in which the outdoor heat exchanger acts as an evaporator. That is, in the heat exchange chamber 10, there is a great need for draining condensed water in order to compare rainwater and condensed water. The drainage configuration including the condensate pan 16 and the drainage passage 17 for the outdoor heat exchanger 11 of the present embodiment can drain the condensate through a dedicated path, and thus can efficiently drain the engine-driven pump 1 as a whole.
Moreover, since the drainage passage 17 receives engine heat radiation from the equipment room 20 on the way, it can prevent the condensed water passing through the inside from being frozen. Even if the condensed water freezes while the engine is stopped, if the engine operation is resumed, it is quickly thawed by engine heat dissipation.
For this reason, even if it is used in winter, it is possible to prevent the drainage passage 17 from freezing and the condensed water collected from the condensed water pan 16 from overflowing to the drain pan 15.

Furthermore, the drainage passage 18 of another form is demonstrated in detail using FIG.4 and FIG.5. In FIG. 4, the internal devices in the device room 20 are omitted from the illustration except for the engine 22 for easy understanding. The outer plate 25 is indicated by a broken line. Furthermore, FIG. 5 shows an AA ′ cross section in FIG.
As shown in FIG. 4, the drainage passage 18 is a passage formed along the four corner frames 21 of the engine-driven heat pump 1.
As shown in FIG. 5, the drainage passage 18 is a passage configured through a packing 26 in a gap between the four corner frame 21 and the outer plate 25. Here, the packing 26 uses, for example, urethane having elasticity.
That is, the drainage passage 18 is a space formed by an L-shaped four-corner frame 21 in plan view, an outer plate 25 attached to the outside thereof, and a packing 26 disposed between the two, and a conventional four-corner frame. It is configured only by laying packings 26 having the same height as the four corner frames 21 at a position between the outer plate 25 and the outer plate 25 at a predetermined distance from the corners. Usually, since the four corner frames 21 and the outer plate 25 are assembled by a fixing tool such as a bolt, the packing 26 is interposed between the four corner frames 21 and the outer plate 25 in a compressed state. Therefore, when the outer plate 25 is assembled, the drainage passage 18 whose periphery is simply closed is formed as a result. Further, the condensed water pan 16 is provided with a hole communicating with the upper end of the drainage passage 18, and the lower end of the drainage passage 18 is opened so as to be discharged out of the apparatus.

With such a configuration, the condensed water collected by the condensed water pan 16 quickly passes through the drainage passage 18 and is discharged out of the engine-driven heat pump 1.
In this way, the drainage passage 18 can be realized with a simple configuration in which the packing 26 is laid on the conventional four-corner frame 21 and the outer plate 25. In the equipment room 20, the engine corner can receive heat from the four corner frames 21 sufficiently. Therefore, the drainage passage 18 can obtain the same effect as the drainage passage 17.

  In another embodiment, the condensate pan 16 may be provided with a drain passage 17 and a drain passage 18. In the present embodiment, the drainage performance of the condensed water pan 16 can be further improved.

Here, the support structure of the outdoor heat exchanger 11 will be described in detail with reference to FIGS. 6 and 7. In FIG. 6, the condensate pan 16 is indicated by a broken line for easy understanding.
As shown in FIGS. 6 and 7, the outdoor heat exchanger 11 has a configuration in which only support members 11 a arranged at both ends in the width direction protrude at the lower end in order to support a cooling rod (not shown). Yes. That is, the outdoor heat exchanger 11 is placed on the condensed water pan 16 only by the support member 11a.
A large number of cooling fins 11 b are arranged between the support members 11 a of the outdoor heat exchanger 11. The cooling fins 11b are not in contact with the condensed water pan 16 on the bottom surface. That is, it is set as the structure by which the space | gap part 14 is provided between the bottom face of the outdoor heat exchanger 11 and the condensed water pan 16 except the support member 11a of both ends.
Further, an elastic member 30 is intermittently installed in the gap 14 between the bottom surface of the outdoor heat exchanger 11 and the condensed water pan 16 in the width direction of the outdoor heat exchanger 11. In the present embodiment, two elastic members 30 are arranged, but the number of arrangement is not particularly limited. The elastic member 30 is provided in the condensed water pan 16 and supports the outdoor heat exchanger 11 on the bottom surface at the place where the elastic member 30 is installed.
Here, the elastic member 30 is a member having elasticity and insulation. In this embodiment, the elastic member 30 is made of rubber.

By adopting such a configuration, the following effects can be obtained.
That is, since the condensate 14 is provided with the gap 14 in the condensate pan 16 and the outdoor heat exchanger 11, the condensate can quickly flow toward the drainage passages 17 and 18 in the condensate pan 16. Further, the bottom surface of the outdoor heat exchanger 11 is not immersed in the condensed water collected in the condensed water pan 16 by the gap portion 14.
Here, the outdoor heat exchanger 11 is supported by the arrangement of the elastic member 30 without causing deflection. In addition, the elasticity of the elastic member 30 can prevent the generation of excessive stress due to the reaction force of the outdoor heat exchanger 11. Furthermore, the bottom surface of the outdoor heat exchanger 11 can prevent electrolytic corrosion due to condensed water due to the insulating property of the elastic member 30.

Furthermore, the structure of the elastic member 30 is demonstrated in detail using FIG.8 and FIG.9.
FIG. 9 shows a drainage configuration using the drainage passage 17 described above.
As shown in FIG. 8, the elastic member 30 has a simple L shape in which one side of the member is bent upward and the upper surface and the inner surface of the vertical portion are formed as contact portions 31. The depth of the elastic member 30 is shorter than the opening width of the condensed water pan 16. Similarly, the height of the elastic member 30 is set to be lower than the opening height of the condensed water pan 16.

As shown in FIG. 9, the elastic member 30 and the condensed water pan 16 are disposed in contact with the outer side wall 30 a (the side opposite to the contact portion 31) of the elastic member 30 and the opening inner wall 16 a of the condensed water pan 16. ing.
On the other hand, the elastic member 30 and the outdoor heat exchanger 11 are disposed in contact with the contact portion inner wall 31b of the elastic member 30 and the back surface 11c of the outdoor heat exchanger 11. Here, the matter to be noted is that the gap 19 is formed between the elastic member 30 and the opening inner wall 16b.

By adopting such a configuration, the following effects can be obtained.
That is, at the time of assembling the engine-driven heat pump 1, when the elastic member 30 is disposed on the condensed water pan 16, the elastic member 30 is brought into contact with the side wall outer side 30 a and the opening inner wall 16 a of the condensed water pan 16. It is easily positioned with respect to the condensed water pan 16.
Similarly, when the outdoor heat exchanger 11 is disposed on the elastic member 30, the outdoor heat exchanger 11 is brought into contact with the back surface 11 c of the outdoor heat exchanger 11 and the contact portion inner wall 31 b of the elastic member 30. 30 is easily positioned.
Even if the elastic member 30 is disposed in the condensed water pan 16, the drainage in the condensed water pan 16 is hindered by the elastic member 30 due to the gap 19 formed between the elastic member 30 and the inner wall 16 b of the opening. Will never be.

The side view which shows the whole structure of the engine drive type heat pump which concerns on the Example of this invention. The perspective view which similarly shows the drain pan for outdoor heat exchangers. The perspective view which similarly shows a drainage channel. The perspective view which similarly shows another drainage channel. Sectional drawing which similarly shows the AA 'cross section in FIG. The side view which similarly shows the support structure of an outdoor heat exchanger. Similarly perspective view. The perspective view which similarly shows the shape of an elastic member. The fragmentary sectional view which similarly shows the arrangement configuration of an elastic member.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Engine drive type heat pump 10 Heat exchange chamber 11 Outdoor heat exchanger 15 Drain pan 16 Condensate water pan 17 Drain passage 18 Drain passage 20 Equipment chamber 26 Packing 30 Elastic member 31 Contact part

Claims (6)

In an engine-driven heat pump in which an equipment room in which an engine and a compressor are arranged and a heat exchange room in which an outdoor heat exchanger is arranged are divided vertically by a partition wall and a condensate pan dedicated to the outdoor heat exchanger is provided.
An engine-driven heat pump characterized in that a drainage passage that passes through the equipment room is provided downward from the condensed water pan. The engine-driven heat pump according to claim 1,
The both ends of the outdoor heat exchanger in the width direction are configured such that the bottom surfaces thereof are in contact with the condensed water pan, and between the both ends, a gap is provided between the bottom surface and the condensed water pan. An engine-driven heat pump characterized by The engine-driven heat pump according to claim 2,
An engine-driven heat pump, wherein an elastic member for supporting an outdoor heat exchanger is intermittently installed in a gap between a bottom surface of the outdoor heat exchanger and the condensed water pan. The engine-driven heat pump according to claim 3,
An engine-driven heat pump characterized in that the elastic member is a rubber material. The engine-driven heat pump according to claim 4,
An engine-driven heat pump, wherein a gap is provided between the elastic member and a wall surface of the condensed water pan. The engine-driven heat pump according to claim 5,
The elastic member is configured in an L shape in a side view, the outer surface of the elastic member is brought into contact with one inner wall surface of the condensed water pan, and the bottom surface and the front or back surface of the outdoor heat exchanger are arranged on the elastic member. An engine-driven heat pump, wherein the engine-driven heat pump is brought into contact with inner contact portions.

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