JP2010038486A - Outdoor unit of separated air conditioner - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an outdoor unit of a separated air conditioner capable of suppressing increase of frost formation on an outdoor side heat exchanger caused by ice-up phenomenon. <P>SOLUTION: The outdoor unit 10 of the separated air conditioner is composed of the outdoor side heat exchanger 2 provided with a coating to increase planing property and water-repellent property, on a heat exchange face 21 with the outside air, and a drain pan 25 receiving water droplet W from the outdoor side heat exchanger 2. A supporting section 261 projecting toward the outdoor side heat exchanger 2 and supporting a lower face of the outdoor side heat exchanger 2 is disposed on a part opposed to the lower face of the outdoor side heat exchanger 2, of a bottom section of the drain pan 25. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an outdoor unit of a separation-type air conditioner that receives water from an outdoor heat exchanger at the bottom of a drain pan and discharges the water from the drain pan outlet to the outside.

The separation type air conditioner includes an indoor unit installed indoors and an outdoor unit installed outdoor.
Moreover, an air conditioner operates a heat exchanger as an evaporator at the time of heating operation. Here, when the temperature of the air that exchanges heat with the heat exchanger is low or when the evaporation temperature is low, frost is generated on the heat exchange surface of the heat exchanger. When frost is generated, the heat exchange capacity of the heat exchanger decreases, and as a result, the refrigeration capacity of the air conditioner also decreases.

  In particular, since the outdoor unit of the separated air conditioner is directly affected by the outdoor air, if the temperature of the outdoor air decreases during heating operation, the evaporation capacity of the outdoor heat exchanger operating as an evaporator decreases. The heating capacity of the air conditioner is reduced. Therefore, in the separation type air conditioner, a defrosting operation for removing frost attached to the outdoor heat exchanger is appropriately performed.

  However, when the defrosting operation is performed, the heating operation is stopped or the heating capacity is lowered, and thus there is a problem that the heating comfort sensitivity is lowered. Therefore, it has been a challenge to reduce the frequency of suspension of heating operation by suppressing frost formation in the heat exchanger and to shorten the defrosting operation time.

  As a method for solving this problem, a heat exchanger operating as a suppression evaporator is provided by providing a frost suppression layer on the heat exchange surface that increases slidability and water repellency of the heat exchange surface and suppresses frost formation. There has been proposed a method for reducing the amount of frost formation on the surface.

  For example, in Patent Document 1, a composition containing 3 to 70 parts by weight of a specific organopolysiloxane having a silanol group with respect to 100 parts by weight of a specific organopolysiloxane is provided on the heat exchange surface. It is described that a coating film is formed by coating and curing.

Here, with reference to FIG. 7, the structure of the conventional outdoor unit which provided the said frost formation suppression layer in the heat exchange surface is demonstrated.
FIG. 7 is a cross-sectional view schematically showing the configuration of a conventional heat exchanger. The heat exchanger 100 is a so-called cross fin and tube heat exchanger. The heat exchanger 100 has a structure in which a large number of plate fins 101 are arranged on the heat exchange surface with a certain interval, and a heat exchange pipe 102 through which a refrigerant flows is passed through the plate fins 101. Has been. In the heat exchanger 100, the plate fins 101 are arranged so that the longitudinal direction is parallel to the vertical direction, and a fin row in which the plate fins 101 are arranged along a direction orthogonal to the flow direction 103 is a flow direction 103. Are arranged in two rows. The heat exchange pipes 102 penetrating the plate fins 101 are arranged at equal intervals along the longitudinal direction from one end to the other end of the plate fins 101. The surface of the plate fin 101 which is a heat exchange surface is provided with, for example, the frosting suppression layer described above, and the water slidability and water repellency are increased. A drain pan 106 for receiving and discharging water droplets 105 flowing downward from the heat exchanger 100 is disposed below the heat exchanger 100. Here, the drain pan 106 is composed of a flat plate material. The upper surface 106 a of the drain pan 106 is in contact with the entire lower end portion of the heat exchanger 100, that is, the entire lower end portion 101 a of the plate fin 101.

And when the frosting suppression layer is provided in the heat exchanger in this way to increase the water slidability and water repellency of the heat exchange surface, water droplets that condense on the heat exchange surface when the heat exchanger is operated as an evaporator Immediately flows downward from above the heat exchanger. Thereby, the quantity of the water droplet adhering to a heat exchange surface is reduced, and the amount of frost formation on a heat exchange surface can be reduced.
JP 2002-323298 A

  By the way, in the heat exchanger 100 described above, when the heat exchanger 100 is operating as an evaporator, the water droplets 105 that condense on the plate fins 101 flow downward from above as indicated by arrows 107. Here, when the water droplet 105 flowing down from the heat exchanger 100 toward the drain pan 106 is not quickly discharged from the drain pan 106 to the outside of the outdoor unit, the contact portion between the lower end portion 101a of the plate fin 101 and the upper surface 106a of the drain pan 106 is used. The water droplet 105 flowing down from the heat exchanger 100 toward the drain pan 106 may accumulate and freeze.

  When the ice 105a is formed at the lower end 101a of the plate fin 101, the ice 105a and the water droplet 105 flowing down from the heat exchanger 100 toward the ice 105a are frozen, so that the frost 104 is formed as indicated by an arrow 108. A so-called ice-up phenomenon that grows upward from the lower end portion 101a of the plate fin 101 occurs.

  As described above, in the conventional heat exchanger 100, although the surface slidability and water repellency of the plate fin 101 are increased to reduce the amount of frost formation, it is formed on the lower end portion 101 a of the plate fin 101. Due to the growth of the frost 104 from the formed ice 105a, the effect of reducing the amount of frost formation may not be sufficiently obtained.

  The present invention has been made in view of the circumstances as described above, and the purpose thereof is a separation type air conditioner capable of suppressing an increase in the amount of frost formation on the outdoor heat exchanger caused by the ice-up phenomenon. Is to provide an outdoor unit of the machine. This also applies to the heat exchange surface where the frost suppression layer is not provided.

  The invention according to claim 1 is an outdoor unit of a separation-type air conditioner that receives water from the outdoor heat exchanger from the bottom of the drain pan and discharges it from the drain pan outlet to the outside. Among them, the gist is that a support portion that protrudes toward the outdoor heat exchanger and supports the lower surface is provided at a position facing the lower surface of the outdoor heat exchanger.

  According to the above invention, even if the outdoor heat exchanger is provided away from the bottom of the drain pan through the support portion, even if the water staying at the bottom of the drain pan freezes and an ice-up phenomenon occurs, this is immediately In addition, since no frost is formed on the heat exchange surface, it is possible to suppress an increase in the frost amount of the outdoor heat exchanger due to the ice-up phenomenon.

  According to a second aspect of the present invention, in the outdoor unit of the separation type air conditioner according to the first aspect, the entire upper surface of the support portion is located below the outdoor heat exchanger, and the upper surface The gist is to support the lower surface of the outdoor heat exchanger only through the above.

  According to the above invention, since the area of the contact portion between the outdoor heat exchanger and the support portion becomes small, even if the water staying in the drain pan freezes and an ice-up phenomenon occurs, heat is caused by this. It can suppress that the amount of frost formation of an exchange surface increases.

  According to a third aspect of the present invention, in the outdoor unit of the separation type air conditioner according to the first or second aspect, a hole for inserting a heat exchange pipe is formed in the surface of the outdoor heat exchanger. In the heat exchange surface, when the outdoor heat exchanger is viewed from a direction opposite to the heat exchanger surface, a width direction is a direction perpendicular to the central axis of the heat exchange surface. The gist is that it is the same as or smaller than the length in the width direction of the outdoor heat exchanger.

  According to the above invention, the water flowing downward on the outdoor heat exchanger is prevented from excessively stagnating on the upper surface of the support portion, that is, heat exchange is caused by freezing of the water remaining on the upper surface. It can suppress that the amount of frost formation of a surface increases.

  The gist of the invention described in claim 4 is that in the outdoor unit of the separation type air conditioner according to any one of claims 1 to 3, the support part is integrated with a bottom part of the drain pan. To do.

  According to the above invention, since the support part is integrated with the bottom part of the drain pan, separately, a support base for holding the outdoor heat exchanger becomes unnecessary. Therefore, the number of parts can be reduced and the manufacturing cost of the outdoor unit can be reduced.

  According to a fifth aspect of the present invention, in the outdoor unit of the separation type air conditioner according to the fourth aspect, a heat exchange surface in which a hole for inserting a heat exchange pipe is formed in the surface of the outdoor heat exchanger. When the outdoor heat exchanger is viewed from the opposite direction, the direction perpendicular to the central axis of the heat exchange surface is the width direction, and the support portion is arranged from the bottom surface of the drain pan to the outdoor heat exchanger. The gist is that the length in the width direction is reduced toward the surface.

  According to the above invention, compared with the conventional structure in which the upper surface of the drain pan is in contact with the entire lower end portion of the heat exchanger, that is, the entire lower end portion of the plate fin, the support portion and the outdoor heat exchanger The contact area can be reduced.

  According to a sixth aspect of the present invention, in the outdoor unit of the separation type air conditioner according to the fourth aspect, a heat exchange surface in which a hole for inserting a heat exchange pipe is formed in the surface of the outdoor heat exchanger. When the outdoor heat exchanger is viewed from the opposite direction, the direction perpendicular to the central axis of the heat exchange surface is the width direction, and the support portion is arranged from the bottom surface of the drain pan to the outdoor heat exchanger. A lower portion having a shape in which the length in the width direction is constant toward the upper portion, and a length in the width direction from the bottom surface of the drain pan to the outdoor heat exchanger provided at the upper portion of the lower portion. The gist of the invention is that it is constituted by an upper portion having a shape that becomes smaller.

  According to the above invention, compared with the conventional structure in which the upper surface of the drain pan is in contact with the entire lower end portion of the heat exchanger, that is, the entire lower end portion of the plate fin, the support portion and the outdoor heat exchanger The contact area can be reduced.

  According to a seventh aspect of the present invention, in the outdoor unit of the separation type air conditioner according to the fifth or sixth aspect, in the support portion, the side opposite to the outdoor heat exchanger with respect to a bottom portion of the drain pan. The gist is that a heater is provided in the space.

  According to the above invention, in the support portion, the heater is disposed in the space opposite to the outdoor heat exchanger with respect to the bottom portion of the drain pan, thereby suppressing water droplets adhering to the support portion from freezing. be able to. Therefore, it is possible to suppress an increase in the amount of frost formation on the heat exchange surface due to freezing of water droplets attached to the support portion.

  The invention according to claim 8 is the outdoor unit of the separation type air conditioner according to any one of claims 1 to 3, wherein the support part is separate from the bottom part of the drain pan. And

  According to a ninth aspect of the present invention, in the outdoor unit of the separation type air conditioner according to any one of the first to eighth aspects, the support portion is configured to be connected to the outdoor heat exchanger from the bottom surface of the drain pan. And a plurality of plate fins arranged in the arrangement direction of the plurality of plate fins constituting the outdoor heat exchanger.

  According to the above invention, compared with the conventional structure in which the upper surface of the drain pan is in contact with the entire lower end portion of the heat exchanger, that is, the entire lower end portion of the plate fin, the support portion and the outdoor heat exchanger The contact area can be reduced.

  The invention according to claim 10 is the outdoor unit of the separation type air conditioner according to claim 9, further comprising a plurality of connection portions that connect the adjacent support portions, and the support portions and the connection portions. Are connected in a manner that forms a mesh.

  According to the above invention, the support part and the connection part are connected in a form having a mesh, so that the support part and the connection part are formed in a flat plate-like plane that is not a mesh, The path through which ice enters the heat exchanger from the support base can be reduced. Therefore, since the amount of ice heading from the support part and the connection part to the heat exchange surface can be reduced, the amount of frost formation on the heat exchange surface can be reduced.

  The invention according to claim 11 is the outdoor unit of the separation type air conditioner according to claim 10, wherein the bottom part of the drain pan is surrounded by the support part and the connection part below the outdoor heat exchanger. The gist is that the discharge port is provided where water on the bottom of the drain pan flows into the discharge port through a space portion of the mesh.

  According to the said invention, since the water which flowed down from the outdoor heat exchanger flows into a drain outlet via the space part of a mesh, it can suppress that water accumulates in the bottom part of a drain pan. Therefore, it is possible to suppress an increase in the amount of frost formation in the outdoor heat exchanger due to the ice at the bottom of the drain pan.

  The invention according to claim 12 is the outdoor unit of the separation type air conditioner according to any one of claims 1 to 11, wherein the bottom of the drain pan is below the side surface of the outdoor heat exchanger. The gist is that the discharge port is provided at a position located at the top.

  According to the above invention, since the drain outlet is located below the side surface of the outdoor heat exchanger, water droplets flowing down from the outdoor heat exchanger toward the drain pan can be discharged from the drain outlet to the outside of the outdoor unit. It can be efficiently discharged outside the outdoor unit.

  ADVANTAGE OF THE INVENTION According to this invention, the outdoor unit of the separation-type air conditioner which can suppress the increase in the amount of frost formation of the outdoor side heat exchanger resulting from an ice-up phenomenon can be provided.

(First embodiment)
Hereinafter, with reference to FIGS. 1-3, 1st Embodiment which actualized the outdoor unit of the separation type air conditioner of this invention is described.

  As shown in FIG. 1, in the air conditioner 1, the outdoor heat exchanger 2, the expansion valve 3, the indoor heat exchanger 4, the four-way switching valve 5, and the compressor 6 are connected by a refrigerant pipe, A refrigerant circuit is configured.

The air conditioner 1 performs a cooling operation and a heating operation as follows.
During the cooling operation, the four-way switching valve 5 is set to the solid line side in FIG. In this state, the refrigerant that is the heat medium discharged from the compressor 6 is the solid line side of the four-way switching valve 5, the outdoor heat exchanger 2, the expansion valve 3, the indoor heat exchanger 4, and the four-way switching valve 5. Are circulated in the order of the solid line side and sucked into the compressor 6. By such circulation of the refrigerant, the outdoor heat exchanger 2 operates as a condenser, and the indoor heat exchanger 4 operates as an evaporator. Here, in the outdoor heat exchanger 2 that operates as a condenser, the gas refrigerant exchanges heat with the outdoor air to become a liquid refrigerant, whereby the refrigerant radiates heat to the outdoor air. In the indoor heat exchanger 4 operating as an evaporator, the refrigerant exchanges heat with the room air and evaporates to become a gas refrigerant, whereby the room air is absorbed by the refrigerant and cooled.

  On the other hand, during the heating operation, the four-way switching valve 5 is set on the broken line side in FIG. In this state, the refrigerant discharged from the compressor 6 is in the order of the broken line side of the four-way switching valve 5, the indoor heat exchanger 4, the expansion valve 3, the outdoor heat exchanger 2, and the broken line side of the four-way switching valve 5. Is circulated and sucked into the compressor 6. By the refrigerant circulation as described above, the indoor heat exchanger 4 operates as a condenser, and the outdoor heat exchanger 2 operates as an evaporator. Here, in the indoor side heat exchanger 4 that operates as a condenser, the refrigerant radiates heat to the room air by condensing the gas refrigerant by exchanging heat with the room air. In the outdoor heat exchanger 2 operating as an evaporator, the refrigerant exchanges heat with outdoor air and evaporates to become a gas refrigerant, so that the refrigerant absorbs heat from the outdoor air.

  As shown in FIG. 2, the outdoor unit 10 of the air conditioner 1 includes an outdoor heat exchanger 2 that constitutes the refrigerant circuit, and a drain pan that is provided below and supports the outdoor heat exchanger 2. 25. The outdoor heat exchanger 2 is attached to the casing of the outdoor unit.

  The outdoor heat exchanger 2 is configured as a so-called cross fin and tube heat exchanger. Specifically, the outdoor heat exchanger 2 has a plurality of plate fins 22 in which the heat exchange surfaces 21 that exchange heat with the outside air are arranged to face each other, that is, a constant interval between the heat exchange surfaces 21. A plurality of plate fins 22 arranged in parallel in a formed state and a heat exchange pipe 24 penetrating the plurality of plate fins 22 in the arrangement direction of the plate fins 22 are configured. The space formed between the plate fins 22 forms a passage through which air flows, and heat exchange is performed between the air and the refrigerant on the heat exchange surface 21 by the air passing through the passage. Hereinafter, the air flow direction between the plate fins 22 is referred to as an air flow direction X. In the present embodiment, the heat exchange surface 21 is assumed to be a surface in which holes for inserting the heat exchange pipes 24 are formed among the surfaces of the plate fins 22.

  In the outdoor heat exchanger 2, the plate fins 22 are arranged such that the longitudinal direction is parallel to the vertical direction. A row of fins in which the plate fins 22 are arranged along the sides of the air circulation direction X is arranged in one row along the air circulation direction X. A coating film having water slidability and water repellency is formed on the surface of the plate fin 22. The plate fins 22 may be any type of fins as long as they are plate-like fins such as flat fins, slit fins, and waffle fins.

  The drain pan 25 receives and discharges water droplets W flowing downward from the outdoor heat exchanger 2 and constitutes a bottom frame of the outdoor unit 10. The drain pan 25 is provided with a bottom wall 25c that receives the water droplets W, a drain discharge port 25b that discharges the water droplets W on the bottom wall 25c, and a support base 26 that supports the outdoor heat exchanger 2. . The drain discharge port 25b is provided at a position below the outdoor heat exchanger 2 in the bottom wall 25c, that is, to face the lower end surface 221 of the plate fin 22 of the outdoor heat exchanger 2. The support base 26 is separate from the bottom wall 25c, and is fixed to the upper surface 25a of the bottom wall 25c.

  As shown in FIG. 3, the support base 26 is configured as a separate body from the drain pan 25 by combining a plurality of metal frames having a rectangular cross section in a lattice form. When the outdoor heat exchanger 2 is viewed from the side of the air flow direction X, that is, when the outdoor heat exchanger 2 is viewed from the arrangement direction of the plate fins 22, the support base 26 has a bottom of the drain pan 25. A first frame portion 261 that is a support portion that is raised from the wall 25c (see FIG. 2) and forms a square shape, and a connection portion that connects adjacent first frame portions 261 in the arrangement direction of the plate fins 22. A plurality of second frame portions 262 and a third frame portion 263 that contacts and is fixed to the upper surface 25a of the drain pan 25 are provided.

  The first frame portions 261 are provided at equal intervals in the arrangement direction of the plate fins 22 on the drain pan 25 corresponding to the space between the plate fins 22 at one end and the plate fins 22 at the other end. . In addition, the mounting surface 261 a that is the upper surface is in contact with the lower end surface 221 of the plate fin 22, thereby supporting the lower end surface 221 of the plate fin 22. Further, the entire mounting surface 261a is positioned below the outdoor heat exchanger 2, and the lower surface of the outdoor heat exchanger 2 (the lower end surface 2221 of each plate fin 22) is supported only through the mounting surface 261a. Yes. Further, when the outdoor heat exchanger 2 is viewed from the direction facing the heat exchange surface 21 and the width direction is a direction orthogonal to the central axis of the heat exchange surface 21, the length of each first frame portion 261 in the width direction is assumed. Is set smaller than the length in the width direction of the outdoor heat exchanger 2 (each plate fin 22) (see FIG. 2). Further, the area of the portion of the first frame portion 261 that contacts the lower end surface 221 of each plate fin 22 is set to be smaller than the area of the lower end surface 221 of the plate fin 22.

  Each of the second frame portions 262 is connected to each of the first frame portions 261 in a manner of connecting the apexes of the adjacent first frame portions 261 in the arrangement direction of the plate fins 22. As a result, the support base 26 forms a lattice.

  The drain outlet 25b of the drain pan 25 is surrounded by the first frame portion 261 and the second frame portion 262 below the outdoor heat exchanger 2 in the bottom wall 25c of the drain pan 25, that is, each plate fin 22. It is provided in the place corresponding to the lower end surface 221 of this.

  Here, as shown in FIG. 2, when the support base 26 forms a lattice, the water droplets W flowing down from the outdoor heat exchanger 2 pass between the adjacent first frame portions 261, and then the drain discharge port. 25b is discharged to the outside of the outdoor unit 10.

According to the outdoor unit of the separation type air conditioner of the present embodiment, the following effects can be obtained.
(1) In the outdoor unit of the present embodiment, the first frame portion 261 that is the support portion of the support base 26 and the second frame portion 262 that is the connection portion are connected in a manner that forms a mesh. With this configuration, when the first frame portion and the second frame portion are not formed in the mesh, that is, as shown in FIG. 7, the upper surface 106 a of the drain pan 106 contacts the entire lower end portion 101 a of the plate fin 101. Compared with the case where it does, it becomes possible to make small the area which the outdoor side heat exchanger 2 and the mounting surface 261a contact. Accordingly, since the amount of water droplets W flowing down from the outdoor heat exchanger 2 can be reduced in the portion where the outdoor heat exchanger 2 and the mounting surface 261a are in contact with each other, the water droplets W are frozen. The so-called ice-up phenomenon (hereinafter simply referred to as “ice-up phenomenon”) in which the frost formed by the above-described growth grows upward from the lower end surface 221 of the plate fin 22 can be suppressed. As a result, the frost formation amount of the outdoor heat exchanger 2 can be reduced.

  (2) Since the first frame portion 261 and the second frame portion 262 are connected in a meshed manner, the upper surface 106a of the drain pan 106 is connected to the lower end portion 101a of the plate fin 101 as shown in FIG. As compared with the case where the entire surface of the support table 26 is in contact, the path through which the ice attached to the support table 26 enters from the second frame portion 262 of the support table 26 toward the plate fin 22 can be reduced. Therefore, since the amount of ice adhering to the second frame portion 262 of the support base 26 can be reduced, the ice-up phenomenon can be suppressed. As a result, the frost formation amount of the outdoor heat exchanger 2 can be reduced.

  (3) Furthermore, the water droplets W that have flowed downward from the outdoor heat exchanger 2 pass through the drain outlets 25b from the first frame portions 261 and the second frame portions 262 to the outside of the outdoor unit. Water droplets can be discharged. Accordingly, it is possible to suppress the water droplets W from staying on the bottom wall 25c of the drain pan 25, so that the amount of frost formed by freezing of the water droplets W remaining on the bottom wall 25c of the drain pan 25 can be reduced.

(Second Embodiment)
With reference to FIG. 4, 2nd Embodiment which actualized the outdoor unit of the separation-type air conditioner of this invention of this invention is described. In addition, since the structure of the outdoor side heat exchanger of this embodiment is the same structure as the outdoor side heat exchanger 2 of 1st Embodiment, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

  As shown in FIG. 4, the drain pan 30 receives and discharges water droplets W flowing downward from the outdoor heat exchanger 2 and constitutes a bottom frame of the outdoor unit 10. The drain pan 30 is provided with a plurality of seat portions 31 that are partially raised in the arrangement direction of the plate fins 22 of the outdoor heat exchanger 2. These seat portions 31 constitute a support portion. Here, the seat portion 31 and the drain pan 30 are integrated, that is, the seat portion 31 and the drain pan 30 are formed of a single member.

  As shown in FIG. 4A, the seat 31 is directed from the upper surface 30 b of the bottom wall 30 a that is the bottom surface of the drain pan 30 toward the outdoor heat exchanger 2 in the arrangement direction of the plate fins 22. Thus, the length in the width direction decreases, that is, the rising surface 311 that tapers upward from the lower side of the drain pan 30 and the lower surface of the outdoor heat exchanger 2, that is, the lower end surface of the plate fin 22. An outdoor heat exchanger mounting surface (hereinafter simply referred to as “mounting surface”) 312 is formed. Here, the width direction is a direction orthogonal to the central axis of the heat exchange surface 21 when the outdoor heat exchanger 2 is viewed from the direction facing the heat exchange surface 21. Further, in the width direction, the width H <b> 1 of the placement surface 312 is smaller than the width H <b> 2 of the plate fin 22 that is the width of the outdoor heat exchanger 2. With this configuration, the contact area between the mounting surface 312 and the lower end surface 221 of the plate fin 22 can be reduced.

  Further, as shown in FIG. 4B, the seats 31 are arranged at regular intervals from each other in the arrangement direction of the plate fins 22. In the arrangement direction of the plate fins 22, a drain discharge port 32 that discharges the water droplets W flowing down from the outdoor heat exchanger 2 toward the drain pan 30 to the outside of the outdoor unit is provided between the adjacent seat portions 31. It is done.

According to the outdoor unit of the separation type air conditioner of the present embodiment, the following effects can be obtained.
(4) The outdoor unit of the present embodiment has a configuration in which a plurality of seat portions 31 raised on the drain pan 30 are provided apart from each other in the arrangement direction of the plate fins 22. With this configuration, the seat portions are not separated from each other in the arrangement direction of the plate fins 22, that is, as shown in FIG. 7, the upper surface 106 a of the drain pan 106 is in contact with the entire lower end portion 101 a of the plate fin 101. As compared with the case, the contact area between the outdoor heat exchanger 2 and the placement surface 312 can be reduced. Accordingly, since the amount of water droplets W that have flowed down from the outdoor heat exchanger 2 can be reduced in the portion where the outdoor heat exchanger 2 and the mounting surface 312 are in contact, the ice-up phenomenon is suppressed. be able to. As a result, the frost formation amount of the outdoor heat exchanger 2 can be reduced.

  (5) In the outdoor unit of the present embodiment, a drain discharge port 32 is provided between adjacent seats 31 in the arrangement direction of the plate fins 22. With this configuration, the water droplets W flowing down from the outdoor heat exchanger 2 toward the seats 31 are discharged from the drain discharge ports 32 to the outside of the outdoor unit 10, so that the water droplets W adhering to the seats 31 are efficiently removed. Therefore, it can be discharged outside the outdoor unit 10. Therefore, since the amount of water droplets W attached to the seat portion 31 can be reduced, the ice-up phenomenon can be suppressed. As a result, the frost formation amount of the outdoor heat exchanger 2 can be reduced.

  (6) Further, the drain pan 30 and the seat portion 31 are integrated, that is, the drain pan 30 and the seat portion 31 are configured as a single member. Therefore, separately, a support part for holding the outdoor heat exchanger 2 is not required, and the manufacturing cost of the outdoor unit 10 can be reduced.

(Third embodiment)
With reference to FIG. 5, a third embodiment in which the outdoor unit of the separation type air conditioner of the present invention is embodied will be described. In addition, since the structure of the outdoor side heat exchanger of this embodiment is the same structure as the outdoor side heat exchanger 2 of 1st Embodiment, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

  As shown in FIG. 5, the drain pan 40 receives and discharges water droplets W flowing downward from the outdoor heat exchanger 2 and constitutes a bottom frame of the outdoor unit 10. The drain pan 40 is provided with seats 41 that are partially raised at a plurality of locations on the side of the air flow direction X that is the air passage surface direction of the outdoor heat exchanger 2. These seats 41 constitute a support base. Further, in the air flow direction X, the seat portion 41 is disposed on the downstream side of the outdoor heat exchanger 2, that is, on the downstream side of the plate fins 22. A heater 43 for heating the seat portion 41 is disposed in a space S1 on the opposite side of the outdoor heat exchanger 2 with respect to the bottom portion of the drain pan 40 in the seat portion 41 below the seat portion 41. . The heater 43 suppresses the water droplets W accumulated in the drain pan 40 from freezing by heating the seat portion 41.

  As shown in FIG. 5A, the seat 41 has a shape in which the length in the width direction decreases from the upper surface 40b of the bottom wall 40a that is the bottom surface of the drain pan 40 toward the outdoor heat exchanger 2, that is, the drain pan. 40, a rising surface 411 that tapers upward from below, and the lower surface of the outdoor heat exchanger 2, that is, the lower surface of the plate fin 22, the outdoor heat exchanger mounting surface (hereinafter simply referred to as "mounting"). 412 ”is formed. Here, the width direction is a direction orthogonal to the central axis of the heat exchange surface 21 when the outdoor heat exchanger 2 is viewed from the direction facing the heat exchange surface 21. Further, in the width direction, the width H4 of the placement surface 412 is smaller than the width H2 of the plate fins 22, which is the width of the outdoor heat exchanger 2. With this configuration, the contact area between the mounting surface 312 and the plate fin 22 can be reduced.

  In addition, as shown in FIG. 5, the seats 41 are arranged at regular intervals in the arrangement direction of the plate fins 22. In the arrangement direction of the plate fins 22, a drain discharge port 42 that discharges the water droplets W flowing down from the outdoor heat exchanger 2 to the outside of the outdoor unit is provided between the adjacent seat portions 41. It is done. The drain outlet 42 is provided in the same position as the upstream side surface of the outdoor heat exchanger 2, that is, the upstream side surface 222 of the plate fin 22 in the air flow direction X. Further, the drain discharge port 42 is formed in a cylindrical shape protruding downward from the seat portion 41. With this configuration, the distance from the inner surface 42 a of the drain discharge port 42 to the plate fin 22 can be made larger than the distance from the upper surface 40 b of the drain pan 40 to the plate fin 22.

According to the outdoor unit of the separation type air conditioner of the present embodiment, in addition to the effects (4) to (6) of the second embodiment, the following effects can be achieved.
(7) In the outdoor unit of this embodiment, since the heater 43 is provided below the seat portion 41, the placement surface 412 of the seat portion 41 and the lower surface of the outdoor heat exchanger 2, that is, below the plate fins 22. Freezing of the water droplets W can be suppressed at the portion where the end surface 221 contacts. Therefore, since the freezing of the water droplets W can be suppressed, the frost formed by the freezing of the water droplets W between the plate fins 22 and the seats 41 grows from the lower ends of the plate fins 22 to the upper portion, so-called ice-up. The phenomenon can be suppressed. As a result, the frost formation amount of the outdoor heat exchanger 2 can be reduced.

  (8) In the outdoor unit of this embodiment, in the air flow direction X, the drain outlet 42 of the drain pan 40 is substantially the same as the upstream side surface of the outdoor heat exchanger 2, that is, the upstream side surface 222 of the plate fin 22. It is set as the structure provided in a position. With this configuration, when the water droplet W on the upstream side surface 222 of the plate fin 22 flows down below the plate fin 22, it is directly discharged from the drain discharge port 42 to the outside of the outdoor unit 10. Accordingly, the portion where the water droplets W adhering to the upstream side surface 222 of the plate fin 22 accumulate in the drain pan 40 is formed to be small, so that the drain discharge port is compared with the case where the upstream side surface 222 of the plate fin 22 is provided at a different position. Thus, it is possible to reduce the amount of water droplets W collected in the drain pan 40.

  (9) Further, since the drain discharge port 42 is formed in a cylindrical shape protruding downward from the seat portion 41 of the drain pan 40, compared to the distance from the upper surface 40b of the drain pan 40 to the plate fins 22, The distance from the inner surface 42a of the drain outlet 42 to the plate fin 22 can be increased. Therefore, when the water droplets W attached to the inner surface 42a of the drain outlet 42 grow toward the plate fins 22, the amount of ice that grows from the inner surface 42a to the plate fins 22 grows from the upper surface 40b of the drain pan 40 to the plate fins 22. Since a larger amount is required than the amount of ice, the amount of ice attached to the plate fins 22 can be reduced. As a result, the frost formation amount of the outdoor heat exchanger 2 can be reduced.

(Fourth embodiment)
With reference to FIG. 6, 4th Embodiment which actualized the outdoor unit of the separation type air conditioner of this invention of this invention is described. In addition, since the structure of the outdoor side heat exchanger of this embodiment is the same structure as the outdoor side heat exchanger 2 of 1st Embodiment, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

  As shown in FIG. 6, the drain pan 50 receives and discharges water droplets W flowing downward from the outdoor heat exchanger 2 and constitutes a bottom frame of the outdoor unit 10. The drain pan 50 is provided with a plurality of seats 51 serving as upper portions that are partially raised in the arrangement direction of the plate fins 22. These seat parts 51 constitute a support part. Further, in the air flow direction X, the seat portion 51 is disposed at the center side of the outdoor heat exchanger 2, that is, at the center of the plate fin 22. A heater 53 for heating the seat 51 is disposed in a space S2 on the opposite side of the outdoor heat exchanger 2 with respect to the bottom of the drain pan 50 in the seat 51 that is below the seat 51. . The heater 53 prevents the water droplets W accumulated in the drain pan 50 from freezing by heating the seat portion 51.

  As shown in FIG. 6A, in the arrangement direction of the plate fins 22, the seat portion 51 has a rising surface 511 that tapers upward from below the drain pan 50 and an outdoor heat exchange. An outdoor heat exchanger mounting surface (hereinafter simply referred to as “mounting surface”) 512 that contacts the lower surface of the vessel 2, that is, the lower end surface 221 of the plate fin 22 is formed. The rising surface 511 is formed in a curved surface shape.

  Here, when the outdoor heat exchanger 2 is viewed from the direction facing the heat exchange surface 21, the width H5 of the mounting surface 512 in the width direction that is a direction orthogonal to the central axis of the heat exchange surface 21 is It is smaller than the width H2 of the plate fin 22, which is the width of the outer heat exchanger 2. With this configuration, the contact area between the mounting surface 512 and the plate fin 22 can be reduced. In particular, the mounting surface 512 of the present embodiment has a smaller width H5 of the mounting surface 512 than the second and third embodiments. Further, in the air flow direction X, the width J1 of the mounting surface 512 of the present embodiment is the widths J3 (see FIG. 4) and J4 (see FIG. 5) of the seat portions 31 and 41 of the second and third embodiments. Bigger than that.

  In addition, as shown in FIG. 6, the seats 51 are arranged at regular intervals from each other in the arrangement direction of the plate fins 22. And in the air circulation direction X, the recessed part 54 used as the lower part recessed toward the downward direction from the seat part 51 is provided in the upstream and downstream of each seat part 51, respectively. Here, the width J2 of the recess 54 is substantially equal to the width J1 of the mounting surface 512. Each recess 54 is provided with a plurality of drain discharge ports 52 for discharging the water droplets W flowing down from the outdoor heat exchanger 2 toward the recess 54 to the outside of the outdoor unit. In this case, the seat portion 51 as a support portion has a shape in which the width direction is constant toward the outdoor heat exchanger 2 from the bottom surface 54a where the drain discharge port 52 of the recess 54 serving as the bottom surface of the drain pan 50 is provided. A side portion 51a and an upper portion 51b provided above the lower portion 51a and having a shape in which the length in the width direction decreases from the bottom surface 54a of the recess 54 toward the outdoor heat exchanger 2 are configured. .

  In the air flow direction X, the drain discharge port 52 is provided at substantially the same position as the upstream side surface and the downstream side surface of the outdoor heat exchanger 2, that is, the upstream side surface 222 and the downstream side surface 223 of the plate fin 22. . Further, the drain discharge port 52 is provided at a position continuous with the rising surface 511 of the seat portion 51.

  According to the outdoor unit of the separation type air conditioner of the present embodiment, in addition to the effects (4) and (6) of the second embodiment and the effect (7) of the third embodiment, the following effects are produced. be able to.

  (10) In the outdoor unit of the present embodiment, the drain discharge port 52 is provided in substantially the same position as the upstream side surface 222 and the downstream side surface 223 of the outdoor heat exchanger 2 in the air flow direction X. With this configuration, the water droplets W flowing down from the upper side surface 222 and the downstream side surface 223 of the outdoor heat exchanger 2 from the upper side to the lower side directly pass through the drain discharge port 52, so that the outside of the outdoor unit 10 Can be discharged. Therefore, the amount of water droplets W flowing down from the upper side 222 and the downstream side 223 of the outdoor heat exchanger 2 from the upper side to the lower side can be reduced, and the ice-up phenomenon is suppressed. be able to. As a result, the frost formation amount of the outdoor heat exchanger 2 can be reduced.

  (11) Further, the configuration in which the rising surface of the seat portion 51 is provided at a position continuous with the rising surface 511 of the seat portion 51 allows the water droplets W attached to the seat portion 51 to be efficiently discharged to the drain discharge port 52. it can. Therefore, the amount of water droplets W adhering to the seat portion 51 can be reduced, and the ice-up phenomenon can be suppressed.

  (12) Since the seat portion 51 includes the lower portion 51a and the upper portion 51b, the lower portion of the seat portion 51 is compared with the distance from the upper surface 50a of the drain pan 50 to the plate fin 22. The distance from 51a to the plate fin 22 can be increased. Therefore, when the water droplet W attached to the lower portion 51a grows toward the plate fin 22, the amount of ice that grows from the lower portion 51a to the plate fin 22 grows from the upper surface 50a of the drain pan 50 to the plate fin 22. Therefore, the amount of ice attached to the plate fins 22 can be reduced. As a result, the frost formation amount of the outdoor heat exchanger 2 can be reduced.

(Other embodiments)
In addition, the embodiment of the present invention is not limited to the embodiment exemplified in each of the above embodiments, and can be changed as follows, for example.

  In the first embodiment, the support base 26 is formed by combining a plurality of bars having a rectangular cross section, but the cross section of the bar may be, for example, a round shape or an elliptical shape. By making the cross-sectional shapes of these rods round and elliptical, the area of contact between the lower end surface of the outdoor heat exchanger 2, that is, the lower end surface of the plate fin 22 and the support base 26 is further reduced. Can do. With this configuration, it is possible to reduce the amount of the water droplets W that have flowed down from the outdoor heat exchanger 2 and collected in a portion where the outdoor heat exchanger 2 and the placement surface 261a are in contact with each other, so that the water droplets W are frozen. The so-called ice-up phenomenon in which the frost formed thereby grows from the lower end portion of the plate fin 22 toward the upper portion can be suppressed. As a result, the frost formation amount of the outdoor heat exchanger 2 can be reduced.

  In the first embodiment, the third frame portion 263 of the support base 26 is configured by, for example, a metal linear member such as a bar, but the third frame portion 263 is, for example, a steel plate or the like. It may be a flat member.

  In the first embodiment, in the air flow direction X, the width H3 of the drain outlet 25b of the drain pan 25 is formed substantially equal to the width of the outdoor heat exchanger 2, that is, the width H2 of the plate fins 22. However, the width H3 of the drain outlet 25b may be formed larger than the width H2 of the plate fin 22. With this configuration, in the side surface of the outdoor heat exchanger 2, that is, in the air circulation direction X, the water droplets W flowing down along the side surfaces of the plate fins 22 are discharged directly to the outside of the outdoor unit without accumulating in the drain pan 25. be able to.

  In the first embodiment, the drain pan 25 and the support base 26 are configured as separate members, but the drain pan and the support base may be configured as a single member. With this configuration, a separate member is not necessary for the support base.

  In the second and third embodiments, the rising surfaces 311 and 411 of the seats 31 and 41 are tapered from the bottom to the top, but the seats are viewed from the side in the air flow direction X. The shape may be a square shape matching the width of the placement surface. With this configuration, the contact area between the placement surface and the lower end surface 221 of the plate fin 22 can be reduced. Accordingly, since the amount of water droplets W flowing down from the outdoor heat exchanger 2 can be reduced in the portion where the outdoor heat exchanger 2 and the mounting surface are in contact with each other, the ice-up phenomenon can be suppressed. Can do. As a result, the frost formation amount of the outdoor heat exchanger 2 can be reduced. Further, the rising surface may be a rectangular shape formed from an inclined surface formed on one of the upstream side and the downstream side from the mounting surface. Even with this configuration, the same effects as described above can be obtained.

  In the third embodiment, the seat 41 is provided on the downstream side of the outdoor heat exchanger 2 in the air flow direction X, but the upstream side of the outdoor heat exchanger 2, that is, upstream of the plate fins 22. A seat may be provided on the side. Here, when a seat is provided on the upstream side of the outdoor heat exchanger 2, the drain outlet is provided on the downstream side of the outdoor heat exchanger 2, that is, on the downstream side of the plate fins 22.

  In the third embodiment, the seat 41 and the drain discharge port 42 are provided apart from each other in the air flow direction X. However, as illustrated in FIG. 6, the seat 41 and the drain discharge port 42 are different from each other. You may provide in the continuous position. With this configuration, the water droplets W attached to the seat portion 41 are efficiently discharged to the drain discharge port 42.

  In the second to fourth embodiments, the drain pans 30, 40, 50 and the support base are formed as a single member by forming the seats 31, 41, 51 on the drain pans 30, 40, 50. The drain pans 30, 40, 50 and the support base may be separate members.

  In the first to fourth embodiments, the gap is provided between the outdoor heat exchanger 2 and the drain pans 25, 30, 40, 50, but the upstream side of the outdoor heat exchanger 2. In at least one of the downstream side, a shielding member for reducing the amount of air flowing through the gap may be provided in the drain pans 25, 30, 40, and 50. With this configuration, since the amount of air flowing through the gap is reduced, the amount of air in contact with the heat exchange surface 21 of the plate fin 22 is increased, so that the heat exchange efficiency of the outdoor heat exchanger 2 can be improved. it can.

  -The structure as a support part of this invention is not restricted to the structure illustrated in said each embodiment. In addition, for example, a plurality of support columns can be provided at the bottom of the drain pan, thereby supporting the lower end surface 221 of the plate fin 22. In short, as long as it is interposed between the bottom portion of the drain pan and the lower end surface 221 of the plate fin 22 and supports the lower end surface 221 of the plate fin 22, the structure as the support portion can be changed as appropriate. In this case, the effects similar to the effects of the above embodiments can be obtained.

The circuit diagram which showed the refrigerant circuit of the separation-type air conditioner including the unit about 1st Embodiment which actualized the outdoor unit of the separation-type air conditioner of this invention. (A) Sectional drawing which shows the cross-sectional structure which follows the heat exchange surface of a plate fin about the outdoor unit of the embodiment. (B) The front view which shows the front structure about the outdoor unit of the embodiment. The perspective view which shows the perspective structure of the support stand of a drain pan about the outdoor unit of the embodiment. (A) Sectional drawing which shows the cross-section of the unit along the heat exchange surface of a plate fin about 2nd Embodiment which actualized the outdoor unit of the separation-type air conditioner of this invention. (B) The front view which shows the front structure about the outdoor unit of the embodiment. (A) Sectional drawing which shows the cross-section of the unit along the heat exchange surface of a plate fin about 3rd Embodiment which actualized the outdoor unit of the separation type air conditioner of this invention. (B) The front view which shows the front structure about the outdoor unit of the embodiment. (A) Sectional drawing which shows the cross-section of the unit along the heat exchange surface of a plate fin about 4th Embodiment which actualized the outdoor unit of the separation type air conditioner of this invention. (B) The front view which shows the front structure about the outdoor unit of the embodiment. Sectional drawing which shows the cross-sectional structure along the heat exchange surface of a plate fin about the outdoor unit of the conventional separation-type air conditioner.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Air conditioner, 2 ... Outdoor heat exchanger, 21 ... Heat exchange surface, 221 ... Lower end surface, 22 ... Plate fin, 24 ... Heat exchange pipe, 25 ... Drain pan, 25a ... Upper surface, 25b ... Drain discharge port, 25c ... Bottom wall, 26 ... Support base, 261 ... First frame portion, 261a ... Outdoor heat exchanger mounting surface, 261b ... Rising surface, 262 ... Second frame portion, 263 ... Third frame portion, 3 ... Expansion Valves, 4 ... Indoor heat exchanger, 5 ... Four-way switching valve, 6 ... Compressor, 10 ... Outdoor unit, 30, 40, 50 ... Drain pan, 30a, 40a ... Bottom wall, 30b, 40b, 50a ... Top surface, 31, 41, 51 ... seat, 51 a ... lower part, 51 b ... upper part, 311, 411, 511 ... rising surface, 312, 412, 512 ... mounting surface (outdoor heat exchange mounting surface), 32, 42, 52 ... Drain outlet, 43 53 ... heater, 54 ... concave portion, 54a ... bottom.

Claims (12)

In the outdoor unit of the separation type air conditioner that receives water from the outdoor heat exchanger from the bottom of the drain pan and discharges it from the drain pan outlet,
Separation type air characterized in that a support portion that protrudes toward the outdoor heat exchanger and supports the lower surface is provided at a position facing the lower surface of the outdoor heat exchanger in a bottom portion of the drain pan. The outdoor unit of a harmony machine. In the outdoor unit of the separation type air conditioner according to claim 1,
The support unit has an entire upper surface located below the outdoor heat exchanger, and supports the lower surface of the outdoor heat exchanger only through the upper surface. unit. In the outdoor unit of the separation-type air conditioner according to claim 1 or 2,
Among the surfaces of the outdoor heat exchanger, in the heat exchange surface in which a hole for inserting a heat exchange pipe is formed, the central axis of the heat exchange surface when the outdoor heat exchanger is viewed from the opposite direction The direction orthogonal to the width direction,
An outdoor unit of a separation type air conditioner, wherein a length of the support portion in the width direction is the same as or smaller than a length of the outdoor heat exchanger in the width direction. In the outdoor unit of the separation type air conditioner according to any one of claims 1 to 3,
The outdoor unit of a separation type air conditioner, wherein the support part is integrated with a bottom part of the drain pan. In the outdoor unit of the separation type air conditioner according to claim 4,
About the heat exchange surface in which the hole which inserts a heat exchange pipe is formed among the surfaces of the outdoor heat exchanger, the central axis of the heat exchange surface when the outdoor heat exchanger is viewed from a direction facing the heat exchange surface The direction orthogonal to the width direction,
The outdoor unit of a separation type air conditioner, wherein the support portion has a shape in which the length in the width direction decreases from the bottom surface of the drain pan toward the outdoor heat exchanger. In the outdoor unit of the separation type air conditioner according to claim 4,
About the heat exchange surface in which the hole which inserts a heat exchange pipe is formed among the surfaces of the outdoor heat exchanger, the central axis of the heat exchange surface when the outdoor heat exchanger is viewed from a direction facing the heat exchange surface The direction orthogonal to the width direction,
The support part is provided on a lower part of the drain pan having a shape with a constant length in the width direction from the bottom surface of the drain pan toward the outdoor heat exchanger, and is provided on an upper part of the lower part. An outdoor unit of a separation-type air conditioner, comprising: an upper portion having a shape in which a length in the width direction decreases from a bottom surface toward the outdoor heat exchanger. In the outdoor unit of the separation-type air conditioner according to claim 5 or 6,
The outdoor unit of a separation type air conditioner, wherein a heater is provided in a space on the opposite side of the drain pan relative to the outdoor heat exchanger. In the outdoor unit of the separation type air conditioner according to any one of claims 1 to 3,
The outdoor unit of a separation type air conditioner, wherein the support part is separate from the bottom part of the drain pan. In the outdoor unit of the separation type air conditioner according to any one of claims 1 to 8,
The support portion has a shape that protrudes from the bottom surface of the drain pan toward the outdoor heat exchanger, and a plurality of support portions are arranged at regular intervals in the arrangement direction of the plurality of plate fins constituting the outdoor heat exchanger. An outdoor unit of a separation type air conditioner characterized in that In the outdoor unit of the separation type air conditioner according to claim 9,
An outdoor unit of a separation type air conditioner, further comprising a plurality of connection portions for connecting the adjacent support portions, wherein the support portions and the connection portions are connected in a mesh pattern. In the outdoor unit of the separation type air conditioner according to claim 10,
Of the bottom of the drain pan, the discharge port is provided below the outdoor heat exchanger and surrounded by the support portion and the connection portion, and water on the bottom of the drain pan allows the space of the mesh An outdoor unit of a separation-type air conditioner, wherein the outdoor unit flows into the outlet through a portion. In the outdoor unit of the separation type air conditioner according to any one of claims 1 to 11,
The outdoor unit of a separation-type air conditioner, wherein the discharge port is provided at a position below a side surface of the outdoor heat exchanger in a bottom portion of the drain pan.

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