Air conditioning device

Abstract

The purpose of the present invention is to reliably guide drain water generated at a connection part between a cooler and a refrigerant pipe to a heater without dripping into a control device or the like, and to improve the system efficiency of a refrigerant circuit by effectively using the cold and hot of the drain water. Provided is an air-conditioning device in which a refrigerant circuit, which is formed by connecting a compressor, a heater, a pressure reducer, and a cooler through refrigerant piping, and a control device, which controls the refrigerant circuit and is positioned on one side of the cooler, are housed in a housing. The cooler is configured so as to have a connection part between the cooler and the refrigerant pipe on the upper surface thereof, and to guide drain water generated on the upper surface of the cooler to the opposite side of the control device sandwiching the cooler.

Description

Technical Field

[0001] The invention relates to an air conditioning device. Background Art

[0002] Conventionally, there is known a small air conditioner that contains a set of equipment required for air conditioning such as a refrigerant circuit (a compressor, a condenser, an evaporator, a pressure reducer, etc.), a blower, and a control device that controls them in a frame. Among such air conditioners, there is an air conditioner that has a structure in which an evaporator and a condenser are arranged in order from top to bottom, and drain water generated by the evaporator is introduced into the condenser (for example, Patent Document 1). Prior art literature Patent Literature

[0003] Patent Document 1: Japanese Patent Application Publication No. 2022-001799 Summary of the invention Technical problem to be solved by the invention

[0004] However, in the air conditioning device, drain water is generated not only in the evaporator, but also at and near the connection between the refrigerant piping and the evaporator. In this case, depending on the position of the connection, the drain water generated at the connection may not necessarily be introduced into the condenser, and the drain water may not be fully evaporated. In addition, for example, when the air conditioning device is installed in a vehicle, when the vehicle accelerates or decelerates, goes uphill or downhill, the air conditioning device becomes non-horizontal, and the drain water generated at the connection may drip onto the terminal portion of the control device or the compressor, or leak from the frame of the air conditioning device to the outside.

[0005] The present invention is completed in view of such a situation, and its purpose is to prevent the drain water generated at the connection between the cooler (evaporator) and the refrigerant piping from dripping toward the control device, etc. but to reliably guide it to the heater, and to improve the system efficiency of the refrigerant circuit by effectively utilizing the cold and heat of the drain water. Technical solutions adopted to solve technical problems

[0006] An air conditioning device according to one embodiment of the present invention houses a refrigerant circuit and a control device in a frame, wherein the refrigerant circuit is formed by connecting a compressor, a heater, a pressure reducing unit and a cooler through a refrigerant piping, and the control device controls the refrigerant circuit and is located on one side of the cooler, wherein the cooler is configured to have a connection portion between the cooler and the refrigerant piping on the upper surface, and drain water generated on the upper surface of the cooler is guided to the opposite side of the control device sandwiching the cooler. Effects of the Invention

[0007] According to the present invention, drain water generated at the connection portion between the cooler and the refrigerant pipe can be reliably guided to the heater without dripping onto the control device etc., and the system efficiency of the refrigerant circuit can be improved by effectively utilizing the heat and cold of the drain water. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 It is a perspective view from the back side showing a schematic structure of the interior of the air conditioning apparatus according to the embodiment of the present invention. Figure 2 It is a reference diagram showing the interior of the air conditioning apparatus according to the embodiment of the present invention and explaining the flow of drain water from the upper surface of the cooler. Figure 3 This is a rear view showing a schematic internal structure of the air conditioning apparatus according to the embodiment of the present invention. Figure 4 yes Figure 3 Enlarged view of part A. Figure 5 It is a reference diagram for illustrating the interior of an air conditioning apparatus according to a modified example of the embodiment of the present invention and for explaining the flow of drain water from the upper surface of a cooler. DETAILED DESCRIPTION

[0009] Hereinafter, the mode for implementing the present invention will be described in detail with reference to the accompanying drawings. In the following description, the same reference numerals denote parts with the same functions, and repeated descriptions in the drawings will be omitted as appropriate.

[0010] Figure 1 Schematic structure of the air conditioner 1 of the present embodiment is shown. The air conditioner 1 includes a frame (not shown), a compressor (not shown) accommodated in the frame, a cooler (evaporator) 30, a heater (condenser) 40, a first air supply unit 50, a second air supply unit 60, a pressure reducer 70, and a control device 80. The compressor, the cooler 30, the heater 40, and the pressure reducer 70 are connected by refrigerant pipes 91 to 94, and constitute a refrigerant circuit for circulating the refrigerant. in addition, Figure 1 It is a rear perspective view of the air conditioner 1 , in which the first air supply unit 50 is located on the rear side of the air conditioner 1 relative to the cooler 30 , and the heater 40 is located on the rear side relative to the second air supply unit 60 .

[0011] The cooler 30 is composed of a cooler body and a cooler case that accommodates the cooler body. In the following description, when there is no need to distinguish between the cooler body and the cooler case, the cooler 30 will be described as a representative.

[0012] Similarly, the heater 40 is composed of a heater body and a heater case that accommodates the heater body. However, in the following description, when there is no need to distinguish between the heater body and the heater case, the heater 40 will be described as a representative.

[0013] In addition, the first air blowing unit 50 and the second air blowing unit 60 are composed of a fan and a fan case, but the fans included in the first air blowing unit 50 and the second air blowing unit 60 are omitted from the drawing.

[0014] (About the layout inside the frame) Next, the layout of each device in the housing of the air conditioning device 1 of this embodiment will be described. Figure 1 As shown, in the frame of the air conditioner 1, a compressor, a heater 40, and a second air supply unit 60 are arranged on the bottom plate 15, and above them (upper side in the vertical direction) a cooler 30, a first air supply unit 50, a pressure reducer 70, and a control device 80 are arranged. That is, in the air conditioner 1, the cooler 30 and the heater 40 are arranged in sequence from the top to the bottom (lower side in the vertical direction).

[0015] In a direction perpendicular to the flow direction of air passing through the cooler 30 and in the horizontal direction of the cooler 30, on one side of the cooler 30 ( Figure 1 The control device 80 is configured on the other side ( Figure 1 A pressure reducer 70 is arranged on the right side of the cooler 30. In addition, a compressor and a storage tank (both not shown) are arranged below the control device 80. A first air supply unit 50 is arranged on the upstream side of the cooler 30 in the air flow direction, and a duct 38 is arranged on the downstream side in the air flow direction. The duct 38 includes a blow-out opening 31 connected to a blow-out port provided in the frame.

[0016] That is, on the bottom plate 15, a compressor is arranged on one side of the heater 40, and a second air supply unit 60 is arranged in front of the heater 40. The cooler 30 is arranged above the heater 40 and slightly in front of the heater 40 so as to partially overlap the heater 40 in the vertical direction. On the upper surface of the cooler 30, on the other side of the cooler 30 ( Figure 1 On the right side of the middle portion, that is, on the pressure reducer 70 side, a refrigerant inlet 32 ​​is provided for allowing the refrigerant after passing through the pressure reducer 70 to flow into the cooler 30. The refrigerant inlet 32 ​​and the pressure reducer 70 are connected via a refrigerant pipe 93. In addition, on the upper surface of the cooler 30, on the upstream side of the refrigerant inlet 32 ​​in the air flow direction ( Figure 1At the position of the left side in the middle, a refrigerant outflow port 33 for the refrigerant that passes through the cooler 30 and returns to the compressor is provided. The refrigerant outflow port 33 and the compressor are connected through a refrigerant pipe 94.

[0018] That is, in the cooler 30, the refrigerant inlet 32 ​​is provided so that the refrigerant flows in from the upper surface of the cooler 30, and the refrigerant outlet 33 is provided so that the refrigerant flows out from the upper surface of the cooler 30. The refrigerant inlet 32 ​​is a connection portion between the refrigerant pipe 93 and the cooler 30, and the refrigerant outlet 33 is a connection portion between the refrigerant pipe 94 and the cooler 30.

[0019] Since low-pressure refrigerant flows through the refrigerant pipes 93 and 94, the surroundings of the refrigerant pipes 93 and 94 are usually protected by using insulating materials or the like to prevent drainage water from adhering to the refrigerant pipes 93 and 94. However, the refrigerant inlet 32, which is the connection between the refrigerant pipe 93 and the cooler 30, and the refrigerant outlet 33, which is the connection between the refrigerant pipe 94 and the cooler 30, may not be sufficiently protected by insulating materials, and drainage water may be generated. In particular, drainage water is easily generated at the refrigerant outlet 33, and drainage water may be retained on the upper surface of the cooler 30.

[0020] Therefore, in the air conditioning device of the present embodiment, in order to prevent the drain water from dripping onto the control device 80 or the compressor, the upper surface of the cooler 30 is entirely or partially formed into an inclined surface. In addition, by providing the drain guide 100 in the cooler 30, at least the drain water that may be generated from the refrigerant outflow port 33 is not dripped onto the control device 80 or the compressor, but is guided to the heater. The shape of the upper surface of the cooler 30 and the details of the drain guide 100 will be described later.

[0021] On the upper surface of the heater 40, on the other side of the heater 40 ( Figure 1 A refrigerant inlet 42 for high-pressure refrigerant discharged from the compressor to flow in is provided on the rear side of the heater 40 (center right side) and the heater 40. In addition, a refrigerant outflow outlet 43 is provided on the upper surface of the heater 40 at a position further forward than the refrigerant inlet 42, which passes through the heater 40 and flows out toward the pressure reducer 70.

[0022] That is, in the heater 40 , the coolant inlet 42 is provided so that the coolant flows in from the upper surface of the heater 40 , and the coolant outlet 43 is provided so that the coolant flows out from the upper surface of the heater 40 . The compressor and the refrigerant inlet 42 of the heater 40 are connected by a refrigerant pipe 91 , and the refrigerant outlet 43 and the pressure reducer 70 are connected by a refrigerant pipe 92 .

[0023] (Regarding the flow of refrigerant) In the refrigerant circuit connected as described above, the refrigerant is compressed by the compressor to become a high-pressure gas refrigerant and is discharged. The high-pressure gas refrigerant passes through the refrigerant pipe 91 and flows into the heater 40 via the refrigerant inlet 42, and dissipates heat by exchanging heat with the air sent from the second air supply unit 60 and passing through the heater 40.

[0024] The high-pressure refrigerant flowing out of the refrigerant outlet 43 of the heater 40 passes through the refrigerant pipe 92 and flows into the reducer 70, where it is depressurized and expanded to become a low-pressure refrigerant. The refrigerant having become a low-pressure refrigerant in the reducer 70 passes through the refrigerant pipe 93 and flows into the cooler 30 from the refrigerant inlet 32.

[0025] The low-pressure refrigerant flowing into the cooler 30 absorbs heat by exchanging heat with the air blown by the first air supply unit 50 and passing through the cooler 30, and flows out through the refrigerant outlet 33 of the cooler 30. The refrigerant flowing out of the cooler 30 flows through the refrigerant pipe 94 and returns to the compressor through the receiver. The refrigerant flowing into the compressor is compressed again, and the above cycle is repeated.

[0026] exist Figure 1 In the air conditioning device 1 shown, the air passing through the cooler 30 and the heater 40 circulates in the front-rear direction of the air conditioning device 1. That is, in the air conditioning device 1, the air is circulated from the back to the front with respect to the cooler 30, and the air is circulated from the front to the back with respect to the heater 40, thereby allowing the air passing through the cooler 30 and the heater 40 to exchange heat with the refrigerant.

[0027] (Regarding the shape of the upper surface of the cooler and the drainage guide portion) like Figure 1 and Figure 2 As shown, the cooler 30 is provided with a drain guide portion 100 in a range from the upper surface to the side surface. The drain guide portion 100 includes a first guide portion 101, a second guide portion 102, a third guide portion 103, and a fourth guide portion 104.

[0028] The first guide portion 101 is provided in a range from one end side to the other end side of the upper surface of the cooler 30 along the air flow direction of the cooler 30, and functions as a wall portion for preventing drainage water that may be generated from the refrigerant inlet 32 ​​and the refrigerant outlet 33 from dripping toward the control device 80 or the compressor.

[0029] The second guide portion 102 includes a first wall portion 102A, one end of which is connected to the vicinity of the center of the first guide portion 101 and separates the refrigerant inlet 32 ​​from the refrigerant outlet 33, and a second wall portion 102B, which is continuous from the first wall portion 102A and is provided in a range from the upper end to the lower end of the side surface on the pressure reducer 70 side of the cooler 30. The second wall portion 102B is formed to have a curved portion 102C curved toward the first air supply portion 50 on the side surface of the cooler 30, extends from below the curved portion 102C in a vertical direction to the lower end of the side surface on the pressure reducer 70 side of the cooler 30, and reaches the upper surface of the heater 40 and near the refrigerant outlet 43. The third guide portion 103 is provided on the side surface of the cooler 30 on the pressure reducer 70 side, for example, along the horizontal direction between the first air supply portion 50 and the second wall portion 102B of the second guide portion 102. The second wall portion 102B does not contact the third guide portion 103, and a gap is formed between the second wall portion 102B and the end of the third guide portion 103 for drain water to pass through.

[0031] The fourth guide portion 104 is provided between the duct 38 and the second wall portion 102B of the second guide portion 102, for example, along the horizontal direction, on the side surface of the cooler 30 on the pressure reducer 70 side. One end of the fourth guide portion 104 is in contact with the second wall portion 102B, and deformation and damage are suppressed by reinforcing the second wall portion 102B with the fourth guide portion 104.

[0032] In addition, if Figure 3 and Figure 4 As shown, an inclined surface S1 inclined at an angle α° is formed on the upper surface of the cooler 30 so that the height increases from the end on the pressure reducer 70 side toward the base end of the first guide portion 101 .

[0033] In this way, even if drainage water is generated at the refrigerant outflow port 33 and leaks out to the upper surface of the cooler 30, the drainage water will not leak out to other areas from the area surrounded by the first guide portion 101, the first wall portion 102A of the second guide portion 102 and the refrigerant outflow port 33 on the upper surface of the cooler 30, but will flow to the side of the pressure reducer 70 side of the cooler 30 through the inclined surface S1.

[0034] That is, the drain water flows to the opposite side of the control device 80 and the compressor, sandwiching the cooler 30, through the first guide portion 101 and the inclined surface S1 formed on the upper surface of the cooler 30. In addition, the drain water flowing to the side of the cooler 30 is guided by the second wall portion 102B and along the side of the cooler 30, and is guided to the vicinity of the refrigerant outflow port 43 on the upper surface of the heater 40. By guiding the drain water to the upper part of the heater 40 , the drain water can be sufficiently evaporated in the heater 40 , and the system efficiency of the refrigerant circuit can be improved.

[0035] Furthermore, the first guide portion 101 , the second guide portion 102 , the third guide portion 103 , and the fourth guide portion 104 function not only as drainage guides for draining water but also as ribs, and therefore the strength of the cooler case can be improved.

[0036] Alternatively, a gap may be formed between the fourth guide portion 104 and the second wall portion 102B, and drain water adhering to the refrigerant inlet 32 ​​and dripping along the wall surface of the cooler 30 may be introduced into the heater 40 .

[0037] (Variation Example) Hereinafter, an air conditioning device 2 according to a modified example of the present embodiment will be described. Figure 5 Reference diagrams for explaining the flow of drain water from the upper surface of the cooler 30 of the air-conditioning device 2 according to a modified example of the present embodiment are shown.

[0038] In this modification, the upper surface of the cooler 30 is formed as an inclined surface S2 as a whole. Preferably, the inclined surface S2 is inclined in a manner that the height increases from the end on the pressure reducer 70 side toward the end on the control device 80 side on the upper surface of the cooler 30, and has an inclination angle of the same degree as that of the inclined surface S1. The first guide portion 101 is provided in the middle of the inclined surface S2.

[0039] In this variation, even if the drainage water generated at the refrigerant outflow port 33 leaks to the upper surface of the cooler 30, the drainage water will not leak from the area surrounded by the first guide portion 101, the first wall portion 102A of the second guide portion 102 and the refrigerant outflow port 33 on the upper surface of the cooler 30 to other areas through the inclined surface S2, but will flow to the side of the cooler 30 on the side of the pressure reducer 70.

[0040] The drain water flowing toward the side surface of the cooler 30 is guided by the second wall portion 102B along the side surface of the cooler 30 , and is guided to the vicinity of the refrigerant outflow port 43 on the upper surface of the heater 40 . By guiding the drain water to the upper part of the heater 40 , the drain water can be sufficiently evaporated in the heater 40 , and the system efficiency of the refrigerant circuit can be improved.

[0041] As described above, according to the present embodiment and its variations, even if drainage water is generated and leaks at the connection portion between the cooler and the refrigerant piping, at least a portion of the upper surface of the cooler 30 can be made into an inclined surface so that the drainage water flows to the side opposite to the configuration position of the control device when viewed from the cooler.

[0042] In addition, by providing the first guide portion 101 of the drain guide portion 100 on the upper surface of the cooler, it functions as a wall to prevent the drain water from flowing toward the control device 80. In addition, the drain guide portion 100 guides the drain water from the upper surface of the cooler 30 along the side of the cooler 30 and from above the heater 40 to the heater body.

[0043] Therefore, drain water generated at the connection between the cooler 30 and the refrigerant pipes 93 and 94 can be reliably guided to the heater 40 without dripping toward the control device, etc., and the system efficiency of the refrigerant circuit can be improved by effectively utilizing the heat of the drain water.

[0044] In addition, it is preferable to provide a cutout or groove at the corner between the upper surface of the cooler 30 and the side surface on the pressure reducer 70 side, that is, near the drainage guide 100. Thus, even if the drainage water is retained on the upper surface of the cooler 30, the effect caused by the surface tension of the drainage water can be reduced, so that the drainage can flow smoothly to the side surface of the cooler 30 on the pressure reducer 70 side.

[0045] As mentioned above, the embodiment of the present invention is described in detail with reference to the drawings, but the specific structure is not limited to the above-mentioned embodiment, and even the design change etc. which do not deviate from the scope of the gist of the present invention are also included in the present invention. Explanation of symbols 1, 2: air conditioning device, 15: bottom plate, 30: cooler (evaporator), 31: opening for blowing; 32: refrigerant inlet, 33: refrigerant outlet, 38: pipeline; 40: heater (condenser), 42: refrigerant inlet, 43: refrigerant outlet; 70: pressure reducer, 80: control device, 91-94: refrigerant piping; 100: drainage guide part, 101: first guide part, 102: second guide part, 103: third guide part, 104: fourth guide part; 102A: first wall portion, 102B: second wall portion, 102C: curved portion; S1, S2: inclined surface, α: angle.

Claims

1. An air conditioning device, The air conditioning device accommodates a refrigerant circuit and a control device in a frame, wherein the refrigerant circuit is formed by connecting a compressor, a heater, a pressure reducing unit and a cooler through a refrigerant pipe, and the control device controls the refrigerant circuit and is located on one side of the cooler, and is characterized in that: The cooler is configured to have a connection portion between the cooler and the refrigerant pipe on the upper surface. The drain water generated on the upper surface of the cooler is guided to the opposite side of the control device sandwiching the cooler.

2. The air conditioning device according to claim 1, characterized in that: A drainage guide portion is included that guides the drain water to the heater.

3. The air conditioning device according to claim 2, characterized in that: The heater includes a heater body and a heater housing for accommodating the heater body. The drain guide portion guides the drain water from above the heater case toward the heater body.

4. The air conditioning device according to claim 2, characterized in that: The cooler includes a cooler body and a cooler housing for accommodating the cooler body. The drainage guide is provided along an upper surface and a side surface of an outer side of the cooler case.

5. The air conditioning device according to claim 1, characterized in that: The decompression portion is arranged on the other side of the cooler sandwiching the cooler, The connection portion is provided on the other side of the upper surface of the cooler.

6. The air conditioning device according to claim 5, characterized in that: The upper surface of the cooler is an inclined surface whose height increases from the pressure reducing portion side toward the control device side.

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