JP2012163290A - Outdoor unit for air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an outdoor unit for an air conditioner capable of suppressing growing of ice blocks at a gap between a peripheral section of an air inlet and an end of a heat exchanger in a casing, by suppressing generation of bypass airflow bypassing the heat exchanger from the gap.SOLUTION: The cross fin coil type heat exchanger 30 is disposed in opposition to the air inlet 12 for sucking outside air. A seal member 50 obtained by stacking a first seal material 51 and a second seal material 52 is disposed in the gap between the peripheral section of the air inlet 12 and the heat exchanger 30 in the casing 10. The first seal material 51 has a smaller degree of eroding a heat transfer tube 33 of the heat exchanger 30 than that of the second seal material 52, and the second seal material 52 has flexibility higher than that of the first seal material 51. The first seal material 51 is closely kept into contact with the heat transfer tube 33 projecting from a heat exchange fin 34, and the second seal material 52 is closely kept into contact with the peripheral section of the air inlet 12 of the casing 10.

Description

  The present invention relates to an outdoor unit for an air conditioner, and more particularly to a structure around an end portion of a cross fin coil heat exchanger in an outdoor unit of a heat pump type separate air conditioner.

  Generally, an outdoor unit for an air conditioner includes a casing in which an air suction port for sucking outside air is formed, and a heat exchanger provided so as to close the air suction port from the inside. Moreover, as a heat exchanger, a cross fin coil type heat exchange provided with a heat transfer tube through which a refrigerant flows, a number of flat plate heat exchange fins through which the heat transfer tubes are inserted, and a tube plate through which the heat transfer tubes are inserted. A vessel is commonly used. As such an outdoor unit for an air conditioner, for example, the one described in Patent Document 1 is known.

  Next, such an outdoor unit for an air conditioner will be further described with reference to FIG. In FIG. 7, an arrow F1 indicates an air flow of outside air for heat exchange sucked into the machine, and an arrow F2 indicates an air flow of outside air discharged after heat exchange in the machine. In the outdoor unit, air suction ports 111 and 112 are formed on the rear surface and the left side surface of the casing 110. Further, inside the casing 110, a cross fin coil type heat exchanger 130 for exchanging heat with the outside air is disposed so as to oppose the air suction ports 111 and 112. In particular, the heat exchanger 130 has the air inlets 111 and 112 so that the outside air sucked from the air inlets 111 and 112 passes through the heat exchanger 130, that is, the outside air does not bypass the heat exchanger 130. Close to the defining casing 110. The outside air heat-exchanged in the heat exchanger 130 is configured to be discharged from the air outlet 113 by the axial blower 140.

JP 2008-1111569 A

  By the way, when such an outdoor unit is operated for heating in winter, the evaporation temperature of the refrigerant in the heat exchanger 130 becomes 0 degrees or less, and frost is generated in the heat exchanger 130. In particular, when such an air conditioner is operated for heating in a cold region where the average daily outside air temperature is 5 ° C. or less, for example, the generation of frost in the heat exchanger 130 is significant. It becomes.

  In addition, a normal gap exists between the peripheral portion of the air inlets 111 and 112 in the casing 110 and the end plate of the heat exchanger 130. In the case of a gap formed between the peripheral portion of the air suction port 112 on the left side of the figure and the end plate of the heat exchanger 130, this gap flows axially through the outside of the end portion of the heat exchanger 130. It leads to the suction side of the blower 140. Accordingly, as shown in FIG. 7B, a bypass air flow F3 of the outside air passing through the outside of the end portion of the heat exchanger 130 is generated from this gap. By generating such a bypass air flow F <b> 3, frost is generated in a gap between the peripheral portion of the air inlet 112 in the casing 110 and the end plate of the heat exchanger 130. In this specification, the end plate of the heat exchanger refers to the outermost plate member in the cross fin coil heat exchanger. In the example of FIG. 7, this end plate is the tube plate 132, but if the tube plate 132 is abolished or there is a portion that is partially omitted and does not exist, the outermost fin Is called an end plate.

  And the frost which generate | occur | produced in the clearance gap or its vicinity may remain in the protrusion part in which the fin 134 of the heat exchanger tube 133 is not provided without melt | dissolving at the time of a defrost operation, and frost grows into an ice block. There is. Further, in this case, there is a possibility that a problem that a large force acts on the end portions of the casing 110 and the heat exchanger 130 due to the growth of ice blocks.

  Note that the above-described problem does not exist with respect to the gap that exists between the peripheral portion of the rear air inlet 111 shown in FIG. 7 and the tube plate 131 of the heat exchanger 130. The reason is that the tube plate 131 provided at the right end of the heat exchanger 130 partitions the compressor chamber 122 that houses the compressor 121 and the like together with the partition plate 120. Accordingly, the gap between the peripheral portion of the air inlet 111 in the casing 110 and the tube plate 131 of the heat exchanger 130 is not in communication with the suction side of the axial flow fan 140. For this reason, the amount of bypass air that bypasses the heat exchanger 130 from this gap is small, and replenishment of moisture by the bypass air is reduced. Further, in the compressor chamber 122, there is also heat generation from the compressor 121, so that no growth into ice blocks is observed in the gap between the casing 110 and the tube plate 131.

  By the way, as a solution to the above problem, it is conceivable to provide a sealing member made of a flexible member in the gap between the casing 110 and the tube sheet 132. Moreover, it is possible to use what consists of ethylene propylene diene rubber as this sealing member.

  However, when the seal member made of ethylene propylene diene rubber comes into contact with the heat transfer tube 133, the heat transfer tube 133 may be corroded by sulfur gas generated from the seal member. For this reason, when using a sealing member made of ethylene propylene diene rubber, it is necessary to sandwich this sealing member between the casing 110 and the tube plate 132 of the heat exchanger 130 so as not to touch the heat transfer tube 133. In order to provide the seal member, the tube plate 132 is necessary. Therefore, even when the tube plate 132 can be omitted as a support structure of the heat exchanger 130, there is a problem that the tube plate cannot be omitted or downsized. On the other hand, when a material that does not generate sulfur gas is used as the seal member, corrosion of the heat transfer tube 133 can be suppressed, but the seal member may not be sufficiently adhered to the casing 110.

  The present invention has been made in view of such circumstances, and its purpose is to provide a bypass air flow that bypasses the heat exchanger from the gap between the peripheral portion of the air suction port in the casing and the end of the heat exchanger. An object of the present invention is to provide an outdoor unit for an air conditioner that suppresses the growth of ice blocks in this gap by suppressing the generation.

  The invention according to claim 1 is for an air conditioner including a casing in which an air suction port for sucking outside air is formed, and a cross fin coil heat exchanger provided so as to face the air suction port. In the outdoor unit, a seal member including a first seal material and a second seal material that are stacked is provided in a gap formed between a peripheral portion of an air suction port in the casing and the heat exchanger. As the first sealing material, a material having a smaller degree of corroding the heat transfer tubes constituting the heat exchanger than the second sealing material is used, and as the second sealing material, the first seal is used. A material having greater flexibility than the material is used, and the seal member is in close contact with the heat transfer tube in which the first seal material protrudes from the heat exchange fins constituting the heat exchanger. Both wherein the second seal member is mounted so as to be in close contact with the periphery of the air inlet in the casing.

  According to the above configuration, since the seal member is provided in the gap formed between the peripheral portion of the air inlet in the casing and the heat exchanger, the bypass air flow that bypasses the heat exchanger through this gap. Can be suppressed. Therefore, the growth of ice blocks in this gap can be avoided. In addition, the first sealing material whose degree of corrosion of the heat transfer tube is smaller than that of the second sealing material is in close contact with the heat transfer tube, and the second sealing material is more flexible than the first sealing material. It attaches so that it may closely_contact | adhere to the peripheral part of the air suction inlet. For this reason, the seal member can be sufficiently adhered to the casing, and corrosion of the heat transfer tube can be suppressed.

  According to a second aspect of the present invention, in the outdoor unit for an air conditioner according to the first aspect, the first sealing material has higher rigidity than the second sealing material, and the sealing member Is formed in a laminated member in which the first sealing material and the second sealing material are bonded, and has a width and length suitable for filling a gap between the peripheral portion of the air inlet and the heat exchanger. Further, the first sealing material in the sealing member formed in this way is attached and attached to the protruding portion of the heat transfer tube protruding from the end plate in the heat exchanger. .

  According to the above configuration, the first sealing material has higher rigidity than the second sealing material, and the first sealing material is bonded to the protruding portion of the heat transfer tube protruding from the end plate in the heat exchanger. As a result, the attaching operation of the seal member is facilitated.

  According to a third aspect of the present invention, in the outdoor unit for an air conditioner according to the second aspect, the seal member is formed such that a part thereof is formed of the laminated member, and the other part is formed only from the second seal material. The portion formed of the laminated member in the sealing member is formed in a shape protruding from the laminated member, and the heat transfer tube protruding from the peripheral portion of the air suction port in the casing and the end plate in the heat exchanger The portion of the seal member made of only the second seal material is used for part of the heat exchange in the heat exchanger and the peripheral portion of the air suction port. It is attached so that it may be buried between the fins.

  According to the above configuration, the gap between the peripheral portion of the air suction port in the casing and the protruding portion of the heat transfer tube protruding from the end plate in the heat exchanger is sealed by the sealing member made of the first sealing material and the second sealing material. The Further, the second sealing material seals between the peripheral portion of the air suction port in the casing and some heat exchange fins in the heat exchanger. Therefore, it is possible to further suppress the bypass air flow that bypasses the heat exchanger through the gap between the peripheral portion of the air inlet in the casing and the heat exchanger.

  The invention according to claim 4 is the outdoor unit for an air conditioner according to any one of claims 1 to 3, wherein the heat exchanger is a part of one or more stages of the plurality of stages of the heat transfer tubes. A tube plate through which the heat transfer tube is inserted, and the tube plate has a fixed piece attached to a support that supports the heat exchanger, and the seal member is a portion that is not interfered with the fixed piece It is attached to.

  According to the above configuration, one or more heat transfer tubes of the plurality of heat transfer tubes are inserted into the tube plate, and the seal member is a fixed piece of the tube plate that is attached to the support that supports the heat exchanger. It is provided in the gap so as not to interfere with the part. For this reason, compared with the structure by which the heat exchanger tube of all the stages of a multistage heat exchanger tube is penetrated in a tube plate, a small tube plate can be employ | adopted and the manufacturing cost of the outdoor unit for air conditioners can be reduced. it can.

According to a fifth aspect of the present invention, in the outdoor unit for an air conditioner according to any one of the first to fourth aspects, the first sealing material is made of foamed polyethylene.
According to the said structure, since a 1st sealing material consists of cheap and easy acquisition foamed polyethylene, the cost increase of a sealing member can be suppressed. In addition, since the first sealing material is made of flexible foamed polyethylene, the first sealing material can be reliably adhered to the heat transfer tube.

  The invention according to claim 6 is the outdoor unit for an air conditioner according to any one of claims 1 to 5, wherein the second sealing material is made of ethylene propylene diene rubber.

  According to the said structure, since a 2nd sealing material consists of an ethylene propylene diene rubber excellent in elasticity, weather resistance, cold resistance, etc., a 2nd sealing material can be stuck to a casing reliably.

  According to the present invention, since the seal member is provided in the gap formed between the peripheral portion of the air inlet and the heat exchanger in the casing, the bypass air flow that bypasses the heat exchanger through the gap. Can be suppressed. In addition, the seal member can be sufficiently adhered to the casing, and corrosion of the heat transfer tube can be suppressed.

The perspective view of the outdoor unit for air conditioners which concerns on embodiment of this invention. The plane block diagram which shows schematic structure of the outdoor unit for the air conditioners. The perspective view of the heat exchanger attached in the outdoor unit for the air conditioners. The enlarged view to which a part of FIG. 3 was expanded. The side view seen from the front of the left front end part in the heat exchanger attached in the outdoor unit for air conditioners. The top view of the left front end part in the heat exchanger attached in the outdoor unit for air conditioners. It is a block diagram which shows schematic structure of the conventional outdoor unit for air conditioners, Comprising: (a) is a general view, (b) is the enlarged view to which a part of (a) was expanded.

  Hereinafter, an embodiment embodying the present invention will be described with reference to the drawings. In the following description, the “front-rear direction” is a direction parallel to the front and rear and is a direction indicated by an arrow X in the figure. The “left-right direction” is a direction parallel to the left side and the right side, and is a direction indicated by an arrow Y in the drawing. Further, the “vertical direction” is a direction parallel to the upper side and the lower side, and is a direction indicated by an arrow Z in the drawing. The front-rear direction, the left-right direction, and the up-down direction are linear directions orthogonal to each other.

  The outdoor unit for an air conditioner (hereinafter referred to as “outdoor unit”) according to the present embodiment includes a horizontally long rectangular parallelepiped casing 10 as shown in FIG. 1 and sucks air into the rear surface and the left side surface. Ports 11 and 12 are provided (see FIGS. 1 and 2), and an air discharge port 13 for exhausting outside air heat-exchanged in the machine is provided on the front surface.

  As can be seen from FIGS. 1 and 2, the casing 10 includes a front plate 14, a left side plate 15, a right side plate 16, a top plate 17, a rear plate 18, a bottom frame 19, and the like. The bottom frame 19 is a support that supports the heat exchanger 30 and forms a base member to which various devices are attached. The top surface of the bottom frame 19 also serves as a drain pan for receiving drain dripped from the heat exchanger 30. . Further, the left side plate 15, the right side plate 16, the top plate 17 and the rear plate 18 of the casing 10 are formed as integrally bent sheet metal, and are attached to the bottom frame 19, the partition plate 20, the tube plate 31 of the heat exchanger 30, and the like. It is attached to be fixed.

  In the outdoor unit, a compressor chamber 22 for storing the compressor 21 and the like is formed on the right side, and a heat exchanger chamber 23 for storing the cross fin type heat exchanger 30 and the axial blower 40 is formed on the left side. Is formed. The heat exchanger chamber 23 and the compressor chamber 22 are partitioned by a tube plate 31 forming the right end plate of the heat exchanger 30 and a partition plate 20 connected to the tube plate 31. In the chamber 22, it is comprised so that the airflow by the axial blower 40 may not be formed.

Although not shown, the compressor chamber 22 houses an electrical component box, a pipe joint, a four-way switching valve and the like in addition to the compressor 21 described above.
Further, the heat exchanger 30 accommodated in the heat exchanger chamber 23 faces the air suction ports 11 and 12 on the rear surface and the left side surface in the heat exchanger chamber 23 and closes the air suction ports 11 and 12. In this way, they are arranged in an L shape in plan view. The axial blower 40 accommodated in the heat exchanger chamber 23 is disposed in front of the heat exchanger 30 together with the drive motor 41 so that the heat exchanger 30 is on the suction side in the heat exchanger chamber 23. Has been. The bell mouth 42 forming the outlet of the axial blower 40 forms the air discharge port 13 described above, and the air discharge port 13 is provided with a fan guard.

  The heat exchanger 30 is a cross fin coil heat exchanger in which flat heat exchange fins 34 (hereinafter simply referred to as fins 34) are inserted into hairpin heat transfer tubes 33 (see FIG. 2). In addition, the portions facing the air suction ports 11 on the rear surface are formed in three rows, and the portions facing the air suction ports 12 on the left side are formed in two rows.

  A tube plate 31 through which all the heat transfer tubes 33 are inserted is provided at the right end of the heat exchanger 30. The right tube plate 31 is an end plate that forms the entire side surface of the right end portion of the heat exchanger 30, and also serves as a partition member between the heat exchanger chamber 23 and the compressor chamber 22 as described above. Yes.

  As shown in FIGS. 3 and 4, a partial tube sheet 32 is attached to the left front end of the heat exchanger 30. The tube sheet 32 is partially formed for cost reduction. That is, the left front tube plate 32 is provided mainly for fixing the heat exchanger 30, and only the lower four stages of the heat transfer tubes 33 in the first row from the air suction port 12 are provided. It is formed in a size to be inserted. The tube plate 32 includes an insertion piece portion 32a (see FIG. 4) through which the heat transfer tube 33 is inserted, and a fixing piece portion 32b fixed by a bolt 19c to a mounting plate 19b fixed to the bottom frame 19 by a bolt 19a. And is formed in an L shape in plan view. Therefore, at the left front end of the heat exchanger 30, the tube plate 32 is an end plate in the portion where the tube plate 32 is attached, and the fin 34 attached to the end is the end plate in the other portions. It becomes.

  In the heat exchanger 30 configured as described above, a heat transfer tube 33 that is a hairpin type copper tube is inserted into the fins 34 and the tube plates 31 and 32, and between the fins 34 and the heat transfer tubes 33 by expansion, and The rigidity as a whole is formed by fixing between the tube plates 31 and 32 and the heat transfer tube 33. Then, the right tube plate 31 is fixed to the bottom frame 19 and the casing 10, the left front tube plate 32 is fixed to the bottom frame 19, the periphery of the heat exchanger 30 is fixed by the casing 10, and the like. The heat exchanger 30 is attached by means.

  The heat transfer tubes 33 inserted through the fins 34 and the tube plates 31 and 32 protrude laterally from the end plates. At the left front end of the heat exchanger 30, the heat transfer tube 33 has a U-shaped U-shaped portion 33a as a protruding portion protruding from the end plate.

  There is a gap between the end plate constituting the end portion of the heat exchanger 30 attached as described above and the peripheral portions of the air suction ports 11 and 12 that define the air suction ports 11 and 12 in the casing. It is hard to avoid forming. Therefore, in order to prevent the occurrence of a bypass air flow that bypasses the conventional heat exchanger 30 from such a gap, the end plate constituting the left front end of the heat exchanger 30 and the air inlet 12 A seal member 50 shown in FIGS. 5 and 6 is attached between the peripheral portion. The seal member 50 is attached within a range that does not interfere with the fixed piece 32b of the tube plate 32.

  Note that the gap between the tube plate 31 constituting the right end plate of the heat exchanger 30 and the peripheral portion of the air suction port 11 is the partition between the heat exchanger chamber 23 and the compressor chamber 22. Since it also serves as a member, it does not communicate with the suction side of the axial blower 40. Therefore, an air flow that bypasses the heat exchanger 30 is hardly generated from the gap. For this reason, it is not necessary to attach the seal member 50 to the gap here.

  As shown in FIGS. 5 and 6, the seal member 50 is formed of a first seal material 51 disposed on the heat exchanger 30 side and a second seal material 52 disposed on the casing 10 side. Further, the seal member 50 may have a length and size that fills the gap between the end portion of the heat exchanger 30 and the peripheral portion of the air suction port 12 in the vertical direction, and is formed as an elongated object. Yes. Further, as shown in FIG. 6, the sealing member 50 includes only a laminated portion 50 </ b> A in which a first sealing material 51 and a second sealing material 52 are laminated and bonded together in a plan view, and the second sealing material 52. Is formed in a laminated member including a single layer portion 50B protruding laterally from the laminated portion 50A.

  And 50 A of lamination | stacking parts fill up the space part enclosed by the peripheral part of the air inlet 12 in the casing 10, the end plate in a heat exchanger, and the protrusion part of the heat exchanger tube 33 which protrudes from this end plate, That is, they are attached so as to be in close contact with these members. Further, the single-layer portion 50B made only of the second sealing material 52 is filled between the peripheral portion of the air inlet 12 in the casing 10 and the fin 34 near the left front end plate in the heat exchanger 30, that is, It is attached so as to be in close contact with these members.

  In the above configuration, the first sealing material 51 is made of a foamed polyethylene that is less corrosive to the heat transfer tube 33 than the second sealing material 52 and is rigid enough to maintain a self-standing and vertically extending state. . The second sealing material 52 is made of an ethylene propylene diene rubber that is excellent in elasticity, weather resistance, cold resistance, and the like and that is more flexible than the first sealing material 51.

Next, a method of attaching the sealing member 50 having the above configuration will be described.
First, the heat exchanger 30 is attached to the bottom frame 19 by fixing the left front tube plate 32 and the right tube plate 31 to the bottom frame 19. Next, the seal member 50 is bonded to the U-shaped portion 33 a of the heat transfer tube 33 protruding from the fin 34 at the left front end of the heat exchanger 30. As an adhesion method, an adhesive or a double-sided tape is used. After the sealing member 50 is bonded in this way, a molded product in which the left side plate 15, the right side plate 16, the top plate 17 and the rear plate 18 are formed as an integrally folded product is covered from above, and is fixed at a predetermined position. . In this case, it is important that the sealing member 50 is attached at a predetermined position. That is, in the sealing member 50, the laminated portion 50A is surrounded by the peripheral portion of the air suction port 12 in the casing 10, the left front end plate in the heat exchanger 30, and the protruding portion of the heat transfer tube protruding from the end plate. It is important that it is attached so as to fill the space. Further, it is important that the seal member 50 is attached so that the single-layer portion 50B fills between the peripheral portion of the air inlet 12 in the casing 10 and the fin 34 near the left front end plate in the heat exchanger 30. It is.

The outdoor unit configured as described above is operated as follows during heating.
When the four-way switching valve (not shown) is switched to the heating position and the compressor 21 and the axial flow fan 40 are driven, the heating operation is started. During the heating operation, outside air is taken in from the air inlets 11 and 12, and this outside air is guided to the heat exchange portion of the heat exchanger 30. Thereby, heat is absorbed from outside air in the heat exchanger 30 acting as an evaporator. In this case, frost adheres to the heat exchanger 30 when the outside air temperature decreases and the evaporation temperature becomes 0 degrees or less. For this reason, when the amount of frost exceeds a certain amount, the defrost operation is performed. The defrosting operation is performed using, for example, a high-temperature high-pressure gas as a heat source. During such heating operation, a seal member 50 is attached between the peripheral portion of the air inlet 12 in the casing 10 and the end plate of the heat exchanger 30 at the end portion of the left front heat exchanger 30. Therefore, there is no gap between the peripheral portion of the air inlet 12 and the end portion of the heat exchanger as in the prior art, and no air flow that bypasses the outside of the end plate of the heat exchanger 30 is generated. Therefore, even if the surrounding air is cooled by the heat transfer tube 33 projecting outside the end plate at this end, moisture is not constantly supplied from the bypass air flow. Less frost is formed. Therefore, the fin 34 is not provided in the heat transfer tube 33 protruding outside the end plate, but frost is melted during the defrost operation. Thereby, the growth to the ice block around this gap is avoided.

Since the outdoor unit according to the present embodiment is configured as described above, the following effects can be achieved.
(1) Since the sealing member 50 is provided in a gap formed between the peripheral portion of the air inlet 12 in the casing 10 and the heat exchanger 30, a bypass that bypasses the heat exchanger 30 through the gap. Air flow can be suppressed. Therefore, the growth of ice blocks in this gap can be avoided. In addition, the first seal material 51, which has a lower degree of corroding the heat transfer tube 33 than the second seal material 52, is in close contact with the heat transfer tube 33, and more flexible than the first seal material 51. The second sealing material 52 is attached so as to be in close contact with the peripheral portion of the air inlet 12 in the casing 10. For this reason, the seal member 50 can be sufficiently adhered to the casing 10 and corrosion of the heat transfer tube 33 can be suppressed. Further, the heat transfer tube 33 that is in close contact with the first seal material 51 can be used as a support member for the seal member 50, and it is not necessary to support the seal member 50 with the tube plate 32. For this reason, the tube sheet 32 can be reduced to a size necessary for fixing the heat exchanger 30.

  (2) The sealing member 50 is formed in a laminated member in which the first sealing material 51 and the second sealing material 52 are bonded, and is formed in a shape suitable for filling the gap, and further formed in this way. The first sealing material 51 in the sealed member 50 is attached and attached to the heat transfer tube 33. In such a configuration, the first sealing member 51 has higher rigidity than the second sealing member 52, and the attaching operation of the sealing member 50 is facilitated.

  (3) The space between the peripheral portion of the air inlet 12 in the casing 10 and the U-shaped portion 33 a of the heat transfer tube 33 protruding from the end plate of the heat exchanger 30 is from the first sealing material 51 and the second sealing material 52. The sealing member 50 is sealed by the laminated portion 50A. Further, the space between the peripheral portion of the air inlet 12 in the casing 10 and a part of the fins 34 in the heat exchanger 30 is sealed by the single layer portion 50 </ b> B of the seal member 50 made of the second seal material 52. Therefore, the bypass air flow that bypasses the heat exchanger 30 through the gap between the peripheral portion of the air inlet 12 in the casing 10 and the heat exchanger 30 can be further suppressed.

  (4) In the present embodiment, since the sealing member 50 as described above is attached, the left front tube plate 32 is formed to a size that allows only a portion of the lower heat transfer tube 33 to be inserted, It is formed for fixing the heat exchanger 30. Thereby, cost reduction is achieved. In addition, since the said sealing member 50 is attached so that it may not interfere with this tube sheet 32, the heat exchanger 30 can also be attached easily.

  (5) Since the first sealing material 51 is made of foamed polyethylene that is inexpensive and easily available, an increase in the cost of the sealing member 50 can be suppressed. Moreover, since the 1st sealing material 51 consists of flexible foamed polyethylene, the 1st sealing material 51 can be made to contact | adhere to the heat exchanger tube 33 reliably.

  (6) Since the second sealing material 52 is made of ethylene propylene diene rubber having excellent elasticity, weather resistance, cold resistance, and the like, the second sealing material 52 can be reliably adhered to the casing 10.

(Modification)
The present invention is not limited to the above embodiment, and various design changes can be made based on the spirit of the present invention, and they are not excluded from the scope of the present invention. For example, the above embodiment may be modified as follows, or the following modifications may be combined.

The second sealing material 52 may be made of a material other than ethylene propylene diene rubber as long as it is a material that is more flexible than the first sealing material 51 and is easily adhered to the casing 10.
The first sealing member 51 may be made of a material other than foamed polyethylene as long as it is a material that is less likely to corrode the heat transfer tube 33 than the second sealing member 52 and has a high rigidity.

  If the heat exchanger 30 is fixed with sufficient strength without using the tube plate 32 due to the action of the casing structure, it is not necessary to use this, and in this case the left front tube plate 32 is omitted. May be.

The shape of the sealing member 50 may be changed as appropriate as long as the gap between the peripheral portion and the end of the heat exchanger 30 can be filled in the air suction port 12 of the casing 10.
The heat transfer tube 33 protruding outside the end plate in the heat exchanger 30 is a hairpin tube of the heat transfer tube 33 in the above embodiment, but the heat transfer tube 33 is not limited to such a shape, for example, The heat transfer tube may be formed to have a right-angle shape.

  DESCRIPTION OF SYMBOLS 10 ... Casing, 11, 12 ... Air inlet, 30 ... Heat exchanger, 31, 32 ... Tube plate, 32b ... Fixed piece part, 33 ... Heat exchanger tube, 33a ... U-shaped part (protrusion part), 34 ... Heat Replacement fin, 50... Seal member, 51... First seal material, 52.

Claims (6)

Air provided with a casing (10) in which an air suction port (12) for sucking outside air is formed, and a cross fin coil type heat exchanger (30) provided so as to face the air suction port (12). In outdoor unit for harmony machine,
In the gap formed between the peripheral portion of the air suction port (12) and the heat exchanger (30) in the casing (10), the first sealing material (51) and the second sealing material ( 52) and a sealing member (50) is provided,
In addition, as the first sealing material (51), a material having a smaller degree of corroding the heat transfer tube (33) constituting the heat exchanger (30) than the second sealing material (52) is used. As the second sealing material (52), a material having a higher flexibility than the first sealing material (51) is used.
Further, the sealing member (50) is in close contact with the heat transfer tube (33) in which the first sealing material (51) protrudes from the heat exchange fin (34) constituting the heat exchanger (30). The outdoor unit for an air conditioner, wherein the second sealing material (52) is attached so as to be in close contact with a peripheral portion of the air suction port (12) in the casing (10). In the outdoor unit for air conditioners according to claim 1,
The first sealing material (51) has higher rigidity than the second sealing material (52),
Further, the seal member (50) is formed in a laminated member in which the first seal material (51) and the second seal material (52) are bonded, and a peripheral portion of the air suction port (12). And a width and length suitable for filling a gap between the heat exchanger (30) and the first sealing material (51) in the sealing member (50) formed in this way An outdoor unit for an air conditioner, wherein the outdoor unit is attached to a protruding portion of a heat transfer tube (33) protruding from an end plate of the exchanger (30). In the outdoor unit for air conditioners according to claim 2,
The seal member (50) is formed so that a part thereof is made of the laminated member, and the other part is formed in a shape protruding from the laminated member so as to be made only of the second seal material (52),
The portion of the sealing member (50) made of the laminated member includes a heat transfer tube (33) protruding from a peripheral portion of the air inlet (12) in the casing (10) and an end plate in the heat exchanger (30). ) And the portion made only of the second seal material (52) of the seal member (50) is a portion of the air inlet (12) of the casing (10). The outdoor unit for an air conditioner, which is attached so as to fill a space between a peripheral portion and a part of the heat exchange fins (34) in the heat exchanger (30). In the outdoor unit for air conditioners as described in any one of Claims 1-3,
The heat exchanger (30) includes a tube plate (32) through which a part of one or more stages of the heat transfer tubes (33) are inserted, and the tube plate (32) includes: A fixed piece (32b) attached to a support that supports the heat exchanger (30);
The outdoor unit for an air conditioner, wherein the seal member (50) is attached to a portion that is not interfered with the fixed piece portion (32b). In the outdoor unit for air conditioners as described in any one of Claims 1-4,
The outdoor unit for an air conditioner, wherein the first sealing material (51) is made of polyethylene foam. In the outdoor unit for air conditioners as described in any one of Claims 1-5,
The outdoor unit for an air conditioner, wherein the second sealing material (52) is made of ethylene propylene diene rubber.

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