Vehicle refrigeration cycle unit

Abstract

A refrigeration cycle unit for a vehicle which is interposed between a vehicle exterior heat exchanger and a vehicle interior heat exchanger and performs heat exchange between secondary refrigerants flowing through each of the vehicle exterior heat exchanger and the vehicle interior heat exchanger, wherein the refrigeration cycle unit for a vehicle comprises a base section and a refrigeration cycle fixed to a main surface of the base section and including a compressor, a condenser, an expansion valve, and an evaporator connected sequentially by piping through which a primary refrigerant flows, and the compressor, the condenser, and the evaporator are fixed on the base section so that the lengthwise directions thereof match.

Description

[Technical Field]

[0001] The present disclosure relates to a refrigeration cycle unit for a vehicle. [Background technology]

[0002] Patent Document 1 discloses a refrigeration cycle that includes a compressor, a heat medium cooler (evaporator), and a heat medium heater (condenser) housed in a thermally insulating case, and that constitutes a thermal management system for a vehicle. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2014-201224 Summary of the Invention [Problem to be solved by the invention]

[0004] In the refrigeration cycle disclosed in Patent Document 1, the compressor, evaporator, and condenser are arranged in a row in a case. For example, if the compressor, evaporator, and condenser are placed horizontally in the case so that their longitudinal directions coincide with the horizontal direction, the refrigeration cycle configured by these components occupies an increased space.

[0005] The present disclosure has been made to solve the above-mentioned problems, and has an object to provide a refrigeration cycle unit for a vehicle that can suppress an increase in the space occupied by the refrigeration cycle. [Means for solving the problem]

[0006] In order to solve the above problems, the present disclosure provides a vehicular refrigeration cycle unit that is interposed between an exterior heat exchanger and an interior heat exchanger, and performs heat exchange between secondary refrigerants circulating through the exterior heat exchanger and the interior heat exchanger, and It is flat and has a main surface on one side in the thickness direction.a base portion; and The aforementioned a refrigeration cycle including a compressor, a condenser, an expansion valve, and an evaporator fixed to the main surface and connected in sequence by a pipe through which a primary refrigerant flows; The refrigeration cycle further includes a receiver that separates the primary refrigerant that has passed through the condenser into a gas phase component and a liquid phase component, and supplies only the liquid phase component of the primary refrigerant to the expansion valve, and the condenser and the evaporator are plate-type heat exchangers having a plurality of flat plates that extend in the plate thickness direction and are arranged with gaps between them in an arrangement direction that intersects the plate thickness direction, and each plate has a shape in which the plate thickness direction is its longitudinal direction when viewed from the arrangement direction and the arrangement direction is its longitudinal direction when viewed from the plate thickness direction, the condenser and the evaporator are arranged side by side in a direction that intersects both the arrangement direction and the plate thickness direction, the compressor is arranged at a position offset from the condenser and the evaporator in the arrangement direction and between the condenser and the evaporator in the arrangement direction of the condenser and the evaporator, and the receiver is arranged between the compressor, the condenser, and the evaporator in the arrangement direction, and is surrounded by the compressor, the condenser, and the evaporator, and the receiver has a longitudinal direction, The compressor Longitudinal direction , the condenser The longitudinal direction of the plate and the evaporator The longitudinal direction of the plate so that The receiver, the compressor, the condenser, and the evaporator It is fixed on the base portion. [Effects of the Invention]

[0007] According to the present disclosure, it is possible to provide a refrigeration cycle unit for a vehicle that can suppress an increase in the space occupied by the refrigeration cycle. [Brief explanation of the drawings]

[0008] [Figure 1] 1 is a system diagram showing a configuration of a vehicle air conditioner (during heating operation) according to a first embodiment. [Figure 2] 1 is a perspective view of a vehicle refrigeration cycle unit according to a first embodiment; [Figure 3] 1 is a plan view of a vehicle refrigeration cycle unit according to a first embodiment. [Figure 4] FIG. 2 is a partial cross-sectional view showing the configuration of a heat exchange section of the evaporator according to the first embodiment. [Figure 5] FIG. 2 is a partial cross-sectional view showing the configuration of a heat exchange section of the condenser according to the first embodiment. [Figure 6] FIG. 6 is a perspective view of a vehicle refrigeration cycle unit according to a second embodiment. [Figure 7] FIG. 6 is a plan view of a vehicle refrigeration cycle unit according to a second embodiment. [Figure 8] 1 is a system diagram showing the configuration of a vehicle air conditioner (during cooling operation) according to an embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0009] Hereinafter, a vehicle air conditioning system according to an embodiment of the present disclosure will be described with reference to the drawings.

[0010] [First embodiment] (Vehicle air conditioning system) The vehicle air conditioner 1 is a device mounted on an electric vehicle or the like, and conditions the air inside a vehicle body C. The vehicle air conditioner 1 adjusts the temperature difference between the inside and outside of the vehicle body C. In this embodiment, a configuration in which the vehicle air conditioner 1 operates in heating mode will be described as an example.

[0011] As shown in FIG. 1, the vehicle air conditioner 1 includes a vehicle refrigeration cycle unit 100, a vehicle interior heat medium circuit 20, and a vehicle exterior heat medium circuit 30. In the drawings, among the various lines (pipes) of the vehicle refrigeration cycle unit 100, the vehicle interior heat medium circuit 20, and the vehicle exterior heat medium circuit 30, lines in an open state through which refrigerant can flow are indicated by solid lines, and lines in a closed state through which refrigerant cannot flow are indicated by dashed lines. Also, various valves are indicated in a closed state by being painted black, and in an open state by being painted white.

[0012] (Vehicle refrigeration cycle unit) The vehicle refrigeration cycle unit 100 is a device that circulates a primary refrigerant R1 for heat exchange with a secondary refrigerant R2 used for air conditioning in a vehicle. In this embodiment, the primary refrigerant R1 is, for example, R290 refrigerant (propane), which is a highly flammable hydrocarbon.

[0013] As shown in Figures 2 and 3, the vehicle refrigeration cycle unit 100 includes a base portion 11, a refrigeration cycle 10, and various lines (a suction line 124, a discharge line 143, a pre-expansion line 136, and a post-expansion line 162).

[0014] (base part) The base portion 11 is a flat plate. The base portion 11 has a main surface 11a facing upward in the vertical direction Dv, which is the direction that coincides with the direction of gravity. In other words, the base portion 11 extends in the horizontal direction H, which is the direction perpendicular to the vertical direction Dv, so that the main surface 11a faces upward. The material that constitutes the base portion 11 is, for example, a metal.

[0015] (refrigeration cycle) The refrigeration cycle 10 is composed of multiple devices that realize a thermodynamic cycle. The refrigeration cycle 10 is a refrigerant circuit in which a primary refrigerant R1 as a heat medium is repeatedly compressed, expanded, evaporated, and condensed while circulating and flowing through multiple devices in sequence to exchange heat between the primary refrigerant R1 and a secondary refrigerant R2.

[0016] The refrigeration cycle 10 has an evaporator 12, a compressor 14, a condenser 13, a receiver 15, and an expansion valve 16. These are connected in series by a pipe through which a primary refrigerant R1 flows.

[0017] (evaporator) The evaporator 12 is a plate-type heat exchanger that evaporates (vaporizes) the primary refrigerant R1 by exchanging heat between the primary refrigerant R1 sequentially flowing through the refrigeration cycle 10 and the secondary refrigerant R2 introduced from outside the vehicle refrigeration cycle unit 100. Inside the evaporator 12, the primary refrigerant R1 is heated by the secondary refrigerant R2 and simultaneously cools the secondary refrigerant R2. The evaporator 12 is fixed to the main surface 11a of the base portion 11.

[0018] The evaporator 12 has a heat exchange section 120, a primary refrigerant inlet section 12a, a primary refrigerant outlet section 12b, a secondary refrigerant inlet section 12c, and a secondary refrigerant outlet section 12d.

[0019] As shown in FIG. 4, the heat exchange unit 120 exchanges heat between the primary refrigerant R1 and the secondary refrigerant R2. The heat exchange unit 120 has a plurality of evaporator plates 121 that extend in a flat plate shape. The plurality of evaporator plates 121 are arranged in a line in the horizontal direction H so that they overlap with gaps between them. Hereinafter, the direction in which the evaporator plates 121 are arranged is referred to as the "arrangement direction A1." The evaporator plates 121 have a rectangular shape when viewed from the arrangement direction A1. The evaporator plate 121 is made of a material such as stainless steel or titanium.

[0020] The longitudinal direction of each evaporator plate 121 coincides with the up-down direction Dv. Corresponding sides of a pair of adjacent evaporator plates 121 in the arrangement direction A1 are sealed without gaps by brazing using a brazing material such as copper or nickel. As a result, the multiple evaporator plates 121 are formed integrally, and heat exchange flow paths 122a, 122b extending in the up-down direction Dv are formed between the pair of adjacent evaporator plates 121.

[0021] Therefore, the heat exchange section 120 is formed with a plurality of heat exchange passages 122a, 122b, which are arranged in the horizontal direction H. Among the plurality of heat exchange passages 122a, 122b, the heat exchange passage 122a through which only the primary refrigerant R1 flows and the heat exchange passage 122b through which only the secondary refrigerant R2 flows are arranged on the evaporator plate 121. of The heat exchange passages 122a through which the primary refrigerant R1 flows are mutually connected, and the heat exchange passages 122b through which the secondary refrigerant R2 flows are mutually connected, and these heat exchange passages 122a, 122b are not mutually connected.

[0022] The primary refrigerant R1 introduced into the heat exchange unit 120 flows through the heat exchange passage 122a from the lower side to the upper side in the vertical direction Dv, and the secondary refrigerant R2 flows through the heat exchange passage 122b from the upper side to the lower side in the vertical direction Dv. As the primary refrigerant R1 and the secondary refrigerant R2 flow through the heat exchange passages 122a and 122b, they exchange heat with each other via the evaporator plate 121. That is, the heat of the secondary refrigerant R2 is transferred via the evaporator plate 121 from the heat exchange passage 122b through which the secondary refrigerant R2 flows to the heat exchange passage 122a through which the primary refrigerant R1 flows. As a result, the primary refrigerant R1 evaporates as it moves upward in the vertical direction Dv within the heat exchange passage 122a. That is, the primary refrigerant R1 becomes a gas after passing through the heat exchange passage 122a.

[0023] 2 and 3, the outer shell of the heat exchanger 120, which is composed of the multiple evaporator plates 121, has a rectangular parallelepiped shape. The heat exchanger 120 is fixed to the main surface 11a of the base 11 so as to extend from the main surface 11a of the base 11 around an evaporator axis O1, which is an imaginary axis extending from the main surface 11a of the base 11 in a direction coinciding with the up-down direction Dv. That is, the heat exchanger 120 is provided on the main surface 11a of the base 11 so that its longitudinal direction coincides with the up-down direction Dv. In other words, the heat exchanger 120 is provided in a cantilevered manner with respect to the main surface 11a of the base 11.

[0024] The primary refrigerant inlet portion 12a is an inlet portion for allowing the primary refrigerant R1 to flow into the heat exchange flow path 122a in the heat exchange portion 120. The primary refrigerant inlet portion 12a is provided, for example, in a portion on the lower side in the up-down direction Dv of the evaporator plate 121 arranged on one side in the arrangement direction A1.

[0025] The primary refrigerant outlet portion 12b is an outlet portion for allowing the primary refrigerant R1, which is heated and evaporated in the heat exchange flow path 122a, to flow out from the heat exchange portion 120. The primary refrigerant outlet portion 12b is provided, for example, in an upper portion in the up-down direction Dv of the evaporator plate 121 arranged on one side in the arrangement direction A1.

[0026] The secondary refrigerant inlet portion 12c is an inlet portion for allowing the secondary refrigerant R2 to flow into the heat exchange flow path 122b in the heat exchange portion 120. The secondary refrigerant inlet portion 12c is provided, for example, in an upper portion in the up-down direction Dv of the evaporator plate 121 arranged on one side in the arrangement direction A1.

[0027] The secondary refrigerant outlet portion 12d is located in the heat exchange passage 122b. chilled This is an outlet portion for allowing the secondary refrigerant R2 to flow out from the heat exchange portion 120. The secondary refrigerant outlet portion 12d is provided, for example, in a portion on the lower side in the up-down direction Dv of the evaporator plate 121 arranged on one side in the arrangement direction A1.

[0028] (Compressor) The compressor 14 is a device that compresses the primary refrigerant R1 that has been vaporized by passing through the evaporator 12. The pressure of the primary refrigerant R1 introduced into the compressor 14 is increased to a predetermined pressure that is higher than the pressure before compression by the compression of the compressor 14. As a result, the temperature of the primary refrigerant R1 becomes higher than the temperature before compression.

[0029] The compressor 14 is fixed to the main surface 11a of the base portion 11. The compressor 14 and the evaporator 12 are connected by a suction line 124. That is, one end of the suction line 124 is connected to the primary refrigerant outlet 12b of the evaporator 12, and the other end of the suction line 124 is connected to the suction port 14b of the compressor 14.

[0030] The compressor 14 has a compressor casing 14a, a suction port 14b, and a discharge port 14c. The compressor casing 14a has a cylindrical shape. The compressor casing 14a is fixed to the main surface 11a of the base portion 11 so as to extend from the main surface 11a of the base portion 11 around a compressor axis O2, which is an imaginary axis extending from the main surface 11a of the base portion 11 in a direction coincident with the up-down direction Dv. In other words, the compressor casing 14a is provided in a cantilevered manner relative to the main surface 11a of the base portion 11.

[0031] The compressor 14 in this embodiment is a so-called vertical scroll compressor. The compressor casing 14a contains a fixed scroll (not shown) and an orbiting scroll (not shown), which together define a compression chamber for compressing the primary refrigerant R1, forming a refrigerant compression mechanism (not shown).

[0032] The compression chamber in the compressor casing 14a is provided on the upper side in the vertical direction Dv. A rotary shaft for orbiting the orbiting scroll of the refrigerant compression mechanism is provided inside the compressor casing 14a so as to extend in the vertical direction Dv.

[0033] The suction port 14b is a refrigerant inlet for introducing the primary refrigerant R1 into the refrigerant compression mechanism inside the compressor casing 14a. The suction port 14b is provided at an end of the outer surface of the compressor casing 14a on the lower side in the vertical direction Dv. The primary refrigerant R1 is introduced into the compressor casing 14a through the suction port 14b.

[0034] The discharge port 14c is a refrigerant outlet for discharging the primary refrigerant R1 from the compressor casing 14a. The discharge port 14c is provided at an upper end of the outer surface of the compressor casing 14a in the vertical direction Dv. The primary refrigerant R1 is discharged to the outside of the compressor casing 14a through the discharge port 14c.

[0035] (condenser) The condenser 13 is a plate-type heat exchanger that condenses (liquefies) the primary refrigerant R1, which has been made higher temperature and pressure by passing through the compressor 14 than before compression, by exchanging heat between the primary refrigerant R1 and the secondary refrigerant R2 introduced from outside the vehicle refrigeration cycle unit 100. Inside the condenser 13, the primary refrigerant R1 is cooled by the secondary refrigerant R2 and simultaneously warms the secondary refrigerant R2. The condenser 13 is fixed to the main surface 11a of the base portion 11.

[0036] The condenser 13 has a heat exchange section 130, a primary refrigerant inlet section 13a, a primary refrigerant outlet section 13b, a secondary refrigerant inlet section 13c, and a secondary refrigerant outlet section 13d.

[0037] As shown in Fig. 5, the heat exchange unit 130 exchanges heat between the primary refrigerant R1 and the secondary refrigerant R2. The heat exchange unit 130 has a plurality of condenser plates 131 that extend in a flat plate shape. The plurality of condenser plates 131 are arranged in a line in the horizontal direction H so that they overlap with gaps between them. Hereinafter, the direction in which the condenser plates 131 are arranged is referred to as the "arrangement direction A2." The condenser plates 131 have a rectangular shape when viewed from the arrangement direction A2. The condenser plate 131 is made of a material such as stainless steel or titanium.

[0038] The longitudinal direction of each condenser plate 131 coincides with the up-down direction Dv. Corresponding sides of a pair of adjacent condenser plates 131 in the arrangement direction A2 are sealed without gaps using a brazing material such as copper or nickel. As a result, the multiple condenser plates 131 are formed integrally, and heat exchange flow paths 132a, 132b extending in the up-down direction Dv are formed between the pair of adjacent condenser plates 131.

[0039] Therefore, the heat exchange section 130 is formed with a plurality of heat exchange channels 132a, 132b, which are arranged in the horizontal direction H. In the plurality of heat exchange channels 132a, 132b, the heat exchange channels 132a through which only the primary refrigerant R1 flows and the heat exchange channels 132b through which only the secondary refrigerant R2 flows are alternately repeated in the arrangement direction A2 of the condenser plate 131. The heat exchange channels 132a through which the primary refrigerant R1 flows are connected to each other, and the heat exchange channels 132b through which the secondary refrigerant R2 flows are connected to each other, but these heat exchange channels 132a, 132b are not connected to each other.

[0040] The primary refrigerant R1 introduced into the heat exchange unit 130 flows through the heat exchange passage 132a from the upper side to the lower side in the vertical direction Dv, and the secondary refrigerant R2 flows through the heat exchange passage 132b from the lower side to the upper side in the vertical direction Dv. As the primary refrigerant R1 and the secondary refrigerant R2 flow through the heat exchange passages 132a and 132b, they exchange heat with each other via the condenser plate 131. That is, the heat of the primary refrigerant R1 is transferred via the condenser plate 131 from the heat exchange passage 132a through which the primary refrigerant R1 flows to the heat exchange passage 132b through which the secondary refrigerant R2 flows. As a result, the primary refrigerant R1 condenses as it moves downward in the vertical direction Dv within the heat exchange passage 132a. After passing through the heat exchange passage 132a, the primary refrigerant R1 becomes a liquid fluid.

[0041] 2 and 3, the outer shell of the heat exchanger unit 130, which is composed of the multiple condenser plates 131, has a rectangular parallelepiped shape. The heat exchanger unit 130 is fixed to the main surface 11a of the base unit 11 so as to extend from the main surface 11a of the base unit 11 around a condenser axis O3, which is an imaginary axis extending from the main surface 11a of the base unit 11 in a direction coinciding with the up-down direction Dv. That is, the heat exchanger unit 130 is provided on the main surface 11a of the base unit 11 so that its longitudinal direction coincides with the up-down direction Dv. In other words, the heat exchanger unit 130 is provided in a cantilevered manner with respect to the main surface 11a of the base unit 11.

[0042] The primary refrigerant inlet portion 13a is an inlet portion for allowing the primary refrigerant R1 to flow into the heat exchange flow path 132a in the heat exchange portion 130. The primary refrigerant inlet portion 13a is provided, for example, in an upper portion in the up-down direction Dv of the condenser plate 131 arranged on one side in the arrangement direction A2.

[0043] The primary refrigerant outlet portion 13b is an outlet portion for allowing the primary refrigerant R1, which has been cooled and condensed in the heat exchange flow path 132a, to flow out from the heat exchange portion 130. The primary refrigerant outlet portion 13b is provided, for example, in a portion on the lower side in the up-down direction Dv of the condenser plate 131 arranged on one side in the arrangement direction A2.

[0044] The secondary refrigerant inlet portion 13c is an inlet portion for allowing the secondary refrigerant R2 to flow into the heat exchange flow path 132b in the heat exchange portion 130. The secondary refrigerant inlet portion 13c is provided, for example, in a portion on the lower side in the up-down direction Dv of the condenser plate 131 arranged on the other side in the arrangement direction A2.

[0045] The secondary refrigerant outlet 13d is an outlet portion for allowing the secondary refrigerant R2 heated in the heat exchange passage 132b to flow out from the heat exchange section 130. The secondary refrigerant outlet 13d is provided, for example, in an upper portion in the up-down direction Dv of the condenser plate 131 arranged on the other side in the arrangement direction A2.

[0046] The condenser 13 and the compressor 14 are connected by a discharge line 143. That is, one end of the discharge line 143 is connected to the discharge port 14c of the compressor 14, and the other end of the discharge line 143 is connected to the primary refrigerant inlet portion 13a of the condenser 13.

[0047] As described above, the compressor 14, the condenser 13, and the evaporator 12 are fixed on the base 11 so that their longitudinal directions are aligned. Therefore, the compressor 14, the condenser 13, and the evaporator 12 are aligned in the same position on the base 11.

[0048] (Receiver) The receiver 15 is a gas-liquid separator that receives the primary refrigerant R1 that has become a liquid fluid by passing through the condenser 13, separates the primary refrigerant R1 into a gas phase and a liquid phase, and temporarily stores them inside.

[0049] The receiver 15 and the condenser 13 are connected by a first line 135 of the pre-expansion line 136. That is, one end of the first line 135 is connected to the primary refrigerant outlet 13b of the condenser 13, and the other end of the first line 135 is connected to a refrigerant inlet located at the lower end of the receiver 15. Here, the receiver 15 is supported from below in the up-down direction Dv by this first line 135 connected to the condenser 13, and is supported (held) at a position spaced apart from the main surface 11a of the base portion 11, as shown in FIG. 2 .

[0050] The primary refrigerant R1 in a gas-liquid mixed state introduced into the receiver 15 flows into the liquid phase portion stored inside the receiver 15. The liquid portion of the primary refrigerant R1 that has flowed in is added to the liquid phase, and the remaining gas portion becomes gas bubbles that move upward inside the receiver 15 and are added to the gas phase. The primary refrigerant R1 stored in the liquid phase inside the receiver 15 is discharged to the outside of the receiver 15. As a result, the primary refrigerant R1 in a liquid state is always supplied from the receiver 15.

[0051] (Expansion valve) The expansion valve 16 is a device that receives the primary refrigerant R1 that has become liquid after passing through the receiver 15 and adiabatically expands this primary refrigerant R1. The expansion valve 16 and the receiver 15 are connected by a second line 156 of the pre-expansion line 136. That is, one end of the second line 156 is connected to the refrigerant outlet portion of the receiver 15, and the other end of the second line 156 is connected to the expansion valve 16.

[0052] The pressure of the primary refrigerant R1 introduced into the expansion valve 16 is reduced to a predetermined pressure lower than that before expansion by the expansion action of the expansion valve 16. As a result, the temperature of the primary refrigerant R1 becomes lower than that before expansion. Specifically, the primary refrigerant R1 that has passed through the expansion valve 16 becomes a gas-liquid mixed fluid and drops to a temperature lower than that of the secondary refrigerant R2 with which it is heat exchanged.

[0053] The expansion valve 16 and the evaporator 12 are connected by a post-expansion line 162, and the primary refrigerant R1 that has passed through the expansion valve 16 is introduced into the evaporator 12 through this post-expansion line 162. That is, one end of the post-expansion line 162 is connected to the expansion valve 16, and the other end of the post-expansion line 162 is connected to the primary refrigerant inlet portion 12a of the evaporator 12. Here, the expansion valve 16 is supported by this post-expansion line 162 that connects to the evaporator 12, and is supported (held) at a position spaced apart from the main surface 11a of the base portion 11, as shown in FIG. 2 .

[0054] (Inside vehicle heat transfer circuit) The vehicle interior heat transfer medium circuit 20 is a refrigerant circuit for circulating the secondary refrigerant R2 that has exchanged heat with the primary refrigerant R1 in the refrigeration cycle 10 and for conditioning the air inside the vehicle. In this embodiment, an antifreeze liquid such as ethylene glycol is used as the secondary refrigerant R2.

[0055] As shown in FIG. 1, the vehicle interior heat transfer circuit 20 has a heater core 21 (vehicle interior heat exchanger), a cooler core 22 (vehicle interior heat exchanger), a first pump 23, a first valve 24, a second valve 25, and various lines (first heat transfer line 20a to seventh heat transfer line 20g).

[0056] The heater core 21 and the cooler core 22 are heat exchangers for exchanging heat between the secondary refrigerant R2 and the indoor air inside the vehicle body C and the outdoor air outside the vehicle body C. The secondary refrigerant R2 that has passed through the condenser 13 of the vehicle refrigeration cycle unit 100 is introduced into the heater core 21. In the process of introducing the secondary refrigerant R2 from the condenser 13 into the heater core 21, the secondary refrigerant R2 passes through a first pump 23 and a first valve 24.

[0057] The first pump 23 is a pump that pressure-feeds the secondary refrigerant R2 condensed by the condenser 13 to the heater core 21. A first heat medium line 20a, which serves as a flow path for sucking the secondary refrigerant R2 into the first pump 23, connects the condenser 13 and the first pump 23. That is, one end of the first heat medium line 20a is connected to a secondary refrigerant outlet 13d of the condenser 13, and the other end of the first heat medium line 20a is connected to a refrigerant suction port of the first pump 23.

[0058] A second heat medium line 20b, which serves as a flow path for discharging the secondary refrigerant R2 from the first pump 23 toward the heater core 21, connects the first pump 23 and a first valve 24. That is, one end of the second heat medium line 20b is connected to a refrigerant discharge port of the first pump 23, and the other end of the second heat medium line 20b is connected to the first valve 24. The first valve 24 is a three-way valve that can change the flow path (destination) of the secondary refrigerant R2.

[0059] The first valve 24 and the heater core 21 are connected by a third heat medium line 20c. That is, one end of the third heat medium line 20c is connected to the first valve 24, and the other end of the third heat medium line 20c is connected to the heater core 21.

[0060] The secondary refrigerant R2 introduced into the heater core 21 is cooled by heat exchange with the indoor air of the vehicle body C and the outdoor air introduced into the vehicle body C, and at the same time, warms the indoor air and the outdoor air. This makes it possible to warm the air inside the vehicle body C. Note that the outdoor air is the outside air outside the vehicle body C introduced by the blower B through the front grille F located in front of the vehicle body C in the traveling direction (front side).

[0061] The secondary refrigerant R2 cooled in the heater core 21 is returned to the condenser 13 via the second valve 25. The second valve 25 is a three-way valve that can change the flow path (destination) of the secondary refrigerant R2. Second Valve 25 and the heater core 21 are connected by a fourth heat medium line 20d. That is, one end of the fourth heat medium line 20d is connected to the refrigerant outlet portion of the heater core 21, and the other end of the fourth heat medium line 20d is connected to the second valve 25.

[0062] The second valve 25 and the condenser 13 are connected by a fifth heat medium line 20e. That is, one end of the fifth heat medium line 20e is connected to the second valve 25, and the other end of the fifth heat medium line 20e is connected to the secondary refrigerant inlet 13c of the condenser 13.

[0063] With the above-described configuration, the secondary refrigerant R2 flows sequentially through the condenser 13, the first pump 23, and the heater core 21, and then returns to the condenser 13. By repeating this circulation, heating operation is realized, and the temperature inside the vehicle can be continuously heated.

[0064] Here, the cooler core 22 is provided in the vehicle body C independently of the heater core 21. During cooling operation, the secondary refrigerant R2 that has passed through the evaporator 12 is introduced into the cooler core 22, and heat is exchanged between the secondary refrigerant R2 and outside air. The flow of the secondary refrigerant R2 during cooling operation will be described later.

[0065] (Vehicle outside heat medium circuit) The vehicle-exterior heat medium circuit 30 is a refrigerant circuit for circulating the secondary refrigerant R2 that has exchanged heat with the primary refrigerant R1 in the refrigeration cycle 10, and for cooling the battery for driving the vehicle body. The outside heat transfer circuit 30 has an outside heat exchanger 31, a second pump 32, various valves (third valve 33 to fifth valve 35), a battery cooler 36, and various lines (eighth heat transfer line 30a to twelfth heat transfer line 30e, and first connection line 30f to fourth connection line 30i).

[0066] The exterior heat exchanger 31 is a heat exchanger for exchanging heat between outside air and the secondary refrigerant R2. A portion of the secondary refrigerant R2 that has passed through the evaporator 12 of the vehicle refrigeration cycle unit 100 is introduced into the exterior heat exchanger 31 via a third valve 33. The remaining portion of the secondary refrigerant R2 that has passed through the evaporator 12 is introduced into the battery cooler 36 via a fourth valve 34.

[0067] The evaporator 12 is connected to the third valve 33 and the fourth valve 34 by an eighth heat medium line 30a. Specifically, one end of the eighth heat medium line 30a is connected to the secondary refrigerant outlet 12d of the evaporator 12, and the other end of the eighth heat medium line 30a branches into two directions midway through the eighth heat medium line 30a and is connected to the third valve 33 and the fourth valve 34, respectively. The third valve 33 and the fourth valve 34 are three-way valves that can change the flow path (destination) of the secondary refrigerant R2.

[0068] The third valve 33 and the exterior heat exchanger 31 are connected by a ninth heat medium line 30b. That is, one end of the ninth heat medium line 30b is connected to the third valve 33, and the other end of the ninth heat medium line 30b is connected to a refrigerant inlet of the exterior heat exchanger 31.

[0069] The secondary refrigerant R2 introduced into the exterior heat exchanger 31 through the eighth heat medium line 30a, the third valve 33, and the ninth heat medium line 30b is heated by exchanging heat with the outside air. As a result, the temperature of the secondary refrigerant R2 becomes higher than that of the primary refrigerant R1 introduced into the evaporator 12, and the secondary refrigerant R2 can heat the primary refrigerant R1 circulating through the refrigeration cycle 10 in the evaporator 12. The outside air that is the destination of heat exchange in the exterior heat exchanger 31 is drawn from outside the vehicle body C through the front grille F by a blower B provided on the front side inside the vehicle body C.

[0070] The second pump 32 is a pump that pressure-feeds the secondary refrigerant R2 that has been heated by the exterior heat exchanger 31 to the evaporator 12. The secondary refrigerant R2 that has passed through the exterior heat exchanger 31 passes through a fifth valve 35 in the process of being sucked into the second pump 32. The fifth valve 35 is a three-way valve that can change the flow path (destination) of the secondary refrigerant R2.

[0071] The fifth valve 35 and the exterior heat exchanger 31 are connected by a tenth heat medium line 30c. That is, one end of the tenth heat medium line 30c is connected to the exterior heat exchanger 31, and the other end of the tenth heat medium line 30c is connected to the fifth valve 35.

[0072] An eleventh heat medium line 30d, which serves as a flow path for sucking the secondary refrigerant R2 into the second pump 32, connects the fifth valve 35 and the second pump 32. That is, one end of the eleventh heat medium line 30d is connected to the fifth valve 35, and the other end of the eleventh heat medium line 30d is connected to the second pump 32.

[0073] The second pump 32 and the evaporator 12 are connected by a twelfth heat medium line 30e. That is, one end of the twelfth heat medium line 30e is connected to the second pump 32, and the other end of the twelfth heat medium line 30e is connected to the secondary refrigerant inlet 12c of the evaporator 12. As a result, the secondary refrigerant R2 pressure-fed to the second pump is introduced into the evaporator 12.

[0074] With the configuration described above, the secondary refrigerant R2 flows sequentially through the evaporator 12, the exterior heat exchanger 31, and the second pump 32, and then returns to the evaporator 12. By repeating this circulation, the primary refrigerant R1 circulating through the refrigeration cycle 10 can be continuously heated by heat exchange in the evaporator 12.

[0075] Therefore, the vehicle refrigeration cycle unit 100 is interposed between the exterior heat exchanger 31 and the heater core 21 (interior heat exchanger), and exchanges heat between the secondary refrigerant R2 circulating through the exterior heat exchanger 31 and the interior heat exchanger, respectively.

[0076] The battery cooler 36 is a heat exchanger for cooling the battery. The battery cooler 36 is provided inside the vehicle body C. The remainder of the secondary refrigerant R2, which has been cooled by the evaporator 12 and flows through the eighth heat medium line 30a, is introduced into the battery cooler 36 via the fourth valve 34. The fourth valve 34 and the battery cooler 36 are connected by a first connection line 30f. That is, one end of the first connection line 30f is connected to the fourth valve 34, and the other end of the first connection line 30f is connected to a refrigerant inlet portion of the battery cooler 36.

[0077] The secondary refrigerant R2, which has been warmed by heat exchange with a battery (not shown) in the battery cooler 36, is returned to the evaporator 12. The battery cooler 36 and the eleventh heat medium line 30d are connected by a second connection line 30g. Specifically, one end of the second connection line 30g is connected to a refrigerant outlet port of the battery cooler 36, and the other end of the second connection line 30g is connected to a portion of the eleventh heat medium line 30d that is closer to the fifth valve 35 than the second pump 32. Therefore, the secondary refrigerant R2 that has passed through the battery cooler 36 merges with the eleventh heat medium line 30d via the second connection line 30g, and is pumped again to the evaporator 12 by the second pump 32.

[0078] Here, the fourth valve 34 and the cooler core 22 are connected by a sixth heat transfer medium line 20f. That is, one end of the sixth heat transfer medium line 20f is connected to the fourth valve 34, and the other end of the sixth heat transfer medium line 20f is connected to the fourth valve 34. Coolacoo 22 The cooler core 22 is connected to the refrigerant inlet of the second connecting line 30g. The cooler core 22 and the second connecting line 30g are connected to a seventh heat medium line 20g. That is, one end of the seventh heat medium line 20g is connected to the cooler core 22, and the other end of the seventh heat medium line 20g is connected to the second connecting line 30g. do.

[0079] During heating operation, the fourth valve 34 causes the secondary refrigerant R2 flowing from the eighth heat medium line 30a to flow only through the first connection line 30f, without flowing through the sixth heat medium line 20f. In other words, the fourth valve 34 does not supply the secondary refrigerant R2 to the cooler core 22, but supplies it only to the battery cooler 36.

[0080] Furthermore, the first valve 24 and the fifth valve 35 are connected by a third connection line 30h. That is, one end of the third connection line 30h is connected to the first valve 24, and the other end of the third connection line 30h is connected to the fifth valve 35.

[0081] During heating operation, the first valve 24 allows the secondary refrigerant R2 flowing from the second heat medium line 20b to flow only through the third heat medium line 20c, but not through the third connecting line 30h. The fifth valve 35 allows the secondary refrigerant R2 flowing from the tenth heat medium line 30c to flow only through the eleventh heat medium line 30d, but not through the third connecting line 30h.

[0082] The second valve 25 and the third valve 33 are connected by a fourth connection line 30i. That is, one end of the fourth connection line 30i is connected to the second valve 25, and the other end of the fourth connection line 30i is connected to the third valve 33.

[0083] During heating operation, the second valve 25 allows the secondary refrigerant R2 flowing from the fourth heat medium line 20d to flow only through the fifth heat medium line 20e, but not through the fourth connecting line 30i. The third valve 33 allows the secondary refrigerant R2 flowing from the eighth heat medium line 30a to flow only through the ninth heat medium line 30b, but not through the fourth connecting line 30i.

[0084] (Action and effect) In the vehicle refrigeration cycle unit 100 according to the above embodiment, the compressor 14, the condenser 13, and the evaporator 12 are fixed on the base 11 so that their longitudinal directions are aligned, and therefore, their postures are the same on the base 11. This reduces the occurrence of dead space when these components are unitized as the refrigeration cycle 10, and allows the overall size of the refrigeration cycle 10 to be made compact. Therefore, the increase in the space occupied by the refrigeration cycle 10 can be suppressed.

[0085] Furthermore, the compressor 14, the condenser 13, and the evaporator 12 are fixed to the same base 11 and connected in sequence by piping through which the primary refrigerant R1 flows, so that the refrigeration cycle 10 is integrated by the base 11 and the piping. As a result, even if an exciting force is generated in the compressor 14 as the compressor 14 compresses the primary refrigerant R1, the refrigeration cycle 10 is integrated, so that the exciting force can be dispersed throughout the refrigeration cycle 10 without being unevenly distributed within the refrigeration cycle 10. Therefore, the vibration generated in the refrigeration cycle 10 can be reduced.

[0086] Furthermore, in the vehicle refrigeration cycle unit 100 according to the above embodiment, the longitudinal directions of the compressor 14, the condenser 13, and the evaporator 12 extend in the vertical direction Dv from the upward-facing main surface 11a of the base portion 11 extending in the horizontal direction H, and therefore, they can receive gravity in the longitudinal direction. This makes it difficult for a moment to be applied to the compressor 14, the condenser 13, and the evaporator 12. Therefore, it is possible to further reduce vibrations generated in the refrigeration cycle 10. Furthermore, it is possible to reduce the area required to install the refrigeration cycle 10 on the main surface 11a of the base portion 11.

[0087] Furthermore, in the vehicle refrigeration cycle unit 100 according to the above embodiment, the rotation axis of the compressor 14 is arranged to extend in the vertical direction Dv, so that the compressor 14 can receive gravity in the longitudinal direction. This makes it difficult for a moment to be applied to the compressor 14. Therefore, it is possible to further reduce vibrations generated by the compressor 14. Furthermore, it is possible to reduce the area required to install the compressor 14 on the main surface 11a of the base portion 11.

[0088] Furthermore, in the vehicle refrigeration cycle unit 100 according to the above embodiment, the heat exchange flow paths 122a, 122b, 132a, and 132b of the condenser 13 and the evaporator 12, which extend in the vertical direction Dv, are arranged in the horizontal direction H. This allows the primary refrigerant R1 evaporating in the evaporator 12 and the primary refrigerant R1 condensing in the condenser 13 to be smoothly guided in the vertical direction Dv. That is, the primary refrigerant R1 evaporated in the evaporator 12 can be guided upward in the vertical direction Dv, and the primary refrigerant R1 condensed in the condenser 13 can be guided downward in the vertical direction Dv. This allows for smooth phase transition of the primary refrigerant R1 within the heat exchange flow paths 122a and 132a. This allows the condenser 13 and the evaporator 12 to exhibit optimal performance.

[0089] [Second embodiment] Hereinafter, a vehicle air conditioner 1 according to a second embodiment of the present disclosure will be described. The vehicle refrigeration cycle unit described in the second embodiment differs from the vehicle refrigeration cycle unit of the first embodiment in the arrangement of the receiver of the refrigeration cycle. Components similar to those in the first embodiment are designated by the same reference numerals, and detailed descriptions thereof will be omitted.

[0090] (Receiver) The receiver 15a is a gas-liquid separator that receives the primary refrigerant R1 that has become a liquid fluid by passing through the condenser 13, separates the primary refrigerant R1 into a gas phase and a liquid phase, and temporarily stores them inside.

[0091] The receiver 15a and the condenser 13 are connected by a first line 135 of the pre-expansion line 136. That is, one end of the first line 135 is connected to the primary refrigerant outlet 13b of the condenser 13, and the other end of the first line 135 is connected to a refrigerant inlet located at the lower end of the receiver 15a. Here, the receiver 15a is supported from below in the up-down direction Dv by this first line 135 connected to the condenser 13, and is supported (held) at a position spaced apart from the main surface 11a of the base portion 11, as shown in FIG. 6 .

[0092] The liquid-state primary refrigerant R1 introduced into the receiver 15a flows into the liquid-phase portion stored inside the receiver 15a. The liquid portion of the flowing primary refrigerant R1 is added to the liquid phase, and the remaining gas portion becomes gas bubbles that move upward inside the receiver 15a and are added to the gas phase. The primary refrigerant R1 stored in the liquid phase inside the receiver 15a is discharged outside the receiver 15a. As a result, the liquid-state primary refrigerant R1 is constantly supplied from the receiver 15a to the expansion valve 16.

[0093] 6 and 7, the receiver 15a in this embodiment is surrounded by the evaporator 12, the compressor 14, and the condenser 13. The receiver 15a is supported by a first line 135 at a position spaced apart from the main surface 11a of the base portion 11, with the receiver axis O4 being a virtual axis extending from the main surface 11a in a direction coinciding with the up-down direction Dv as its center. That is, the receiver 15a is supported so that its longitudinal direction coincides with the up-down direction Dv.

[0094] (Action and effect) In the vehicle refrigeration cycle unit 100 according to the above embodiment, the receiver 15aThe longitudinal direction of the receiver 15a coincides with the longitudinal direction of the compressor, condenser, and evaporator, and the receiver 15a is surrounded by these compressor, condenser, and evaporator. This makes it less likely that dead space will be generated when these are unitized as the refrigeration cycle 10, and the overall size of the refrigeration cycle 10 can be made more compact. Therefore, even if the refrigeration cycle 10 has the receiver 15a, it is possible to further suppress an increase in the space occupied by the refrigeration cycle 10.

[0095] [Other embodiments] Although the embodiments of the present disclosure have been described above in detail with reference to the drawings, the specific configurations are not limited to those of the embodiments, and additions, omissions, substitutions, and other modifications of the configurations are possible within the scope of the gist of the present disclosure. Furthermore, the present disclosure is not limited to the embodiments, but is limited only by the claims.

[0096] In the embodiment, the configuration when the vehicle air conditioner 1 is in heating operation has been described as an example, but this is not limited to heating operation, and the vehicle refrigeration cycle unit 100 can also adopt a configuration similar to that of the above embodiment even when performing cooling operation. Hereinafter, the configurations of the vehicle interior heat medium circuit 20 and the vehicle exterior heat medium circuit 30 during cooling operation will be described with reference to FIG.

[0097] The first pump 23 pumps the secondary refrigerant R2 condensed by the condenser 13 to the exterior heat exchanger 31. A first heat medium line 20a, which serves as a flow path for sucking the secondary refrigerant R2 into the first pump 23, connects the condenser 13 and the first pump 23.

[0098] The second heat medium line 20b, which serves as a flow path for discharging the secondary refrigerant R2 from the first pump 23 toward the exterior heat exchanger 31, connects the first pump 23 to the first valve 24. The first valve 24 prevents the secondary refrigerant R2 discharged from the first pump 23 from flowing into the third heat medium line 20c. Third connecting line 30h Drain. Third connecting line 30h The secondary refrigerant R2 that flows into Fifth Valve 35 flows into

[0099] where: Fifth Valve 35 teeth, Third connecting line 30h The secondary refrigerant R2 flowing in from the eleventh heat medium line 30d flows into the tenth heat medium line 30c, not into the eleventh heat medium line 30d. The secondary refrigerant R2 flowing in the tenth heat medium line 30c flows into the exterior heat exchanger 31.

[0100] The secondary refrigerant R2 that has passed through the exterior heat exchanger 31 is returned to the vehicle through the ninth heat medium line 30b. Third Valve 33 Therefore, the air in the vehicle air conditioner 1 cooling The flow direction of the secondary refrigerant R2 flowing through the tenth heat medium line 30c, the exterior heat exchanger 31, and the ninth heat medium line 30b during operation is opposite to the flow direction of the secondary refrigerant R2 during heating operation.

[0101] where: Third Valve 33 The secondary refrigerant R2 flowing in from the ninth heat transfer medium line 30b does not flow into the eighth heat transfer medium line 30a. Fourth connecting line 30i Drain. Fourth connecting line 30i The secondary refrigerant R2 flows into the second valve 25.

[0102] Here, the second valve 25 is Fourth connecting line 30i The secondary refrigerant R2 flowing in from the fourth heat medium line 20d flows into the fifth heat medium line 20e without flowing into the fourth heat medium line 20d. The secondary refrigerant R2 flowing in the fifth heat medium line 20e flows into the condenser 13.

[0103] With the configuration described above, the secondary refrigerant R2 flows sequentially through the condenser 13, the first pump 23, and the exterior heat exchanger 31, and then returns to the condenser 13. By repeating this circulation, the primary refrigerant R1 circulating through the refrigeration cycle 10 can be continuously cooled by heat exchange in the condenser 13.

[0104] The second pump 32 pumps the secondary refrigerant R2 cooled by the evaporator 12 to the cooler core 22. The secondary refrigerant R2 passes through the evaporator 12 by the suction force of the pump and flows into the eighth heat medium line 30a. Fourth Valve 34 where, Fourth Valve 34The secondary refrigerant R2 that has flowed in from the eighth heat medium line 30a flows into both the sixth heat medium line 20f and the first connection line 30f.

[0105] The secondary refrigerant R2 that flows into the sixth heat medium line 20f flows into the cooler core 22. After completing heat exchange in the cooler core 22, the secondary refrigerant R2 flows into the seventh heat medium line 20g and then into the second connecting line 30g. The secondary refrigerant R2 that flows into the second connecting line 30g flows into the eleventh heat medium line 30d and returns to the evaporator 12 via the second pump 32 and the twelfth heat medium line 30e.

[0106] The secondary refrigerant R2 that flows into the first connection line 30f flows into the battery cooler 36. Therefore, the battery cooler 36 exchanges heat with (is cooled by) the secondary refrigerant R2 whether the vehicle air conditioner 1 is in heating operation or cooling operation. The secondary refrigerant R2 that has completed heat exchange in the battery cooler 36 flows into the second connection line 30g. The secondary refrigerant R2 that flows into the second connection line 30g flows into the eleventh heat medium line 30d and returns to the evaporator 12 via the second pump 32 and the twelfth heat medium line 30e.

[0107] With the above-described configuration, the secondary refrigerant R2 flows sequentially through the evaporator 12, the cooler core 22, and the second pump 32, and then returns to the evaporator 12. By repeating this circulation, cooling operation is realized, and the temperature inside the vehicle can be continuously cooled.

[0108] Furthermore, in the above embodiment, the primary refrigerant R1 is exemplified as R290 refrigerant, and the secondary refrigerant R2 is exemplified as ethylene glycol, but other refrigerants may be used as the primary refrigerant R1 and the secondary refrigerant R2.

[0109] In addition, in the embodiment, the compressor 14, the condenser 13, the evaporator 12, and the receiver 15a are fixed on the base portion 11 so that their longitudinal directions are aligned, but this does not necessarily mean that their longitudinal directions are perfectly aligned, and it also includes cases where they are slightly tilted.

[0110] In the embodiment, the corresponding sides of a pair of adjacent evaporator plates 121 in the arrangement direction A1 and the corresponding sides of the condenser plates 131 in the arrangement direction A2 are sealed by brazing, but the present invention is not limited to this configuration. The corresponding sides of a pair of adjacent evaporator plates 121 and condenser plates 131 may be sealed by welding, for example.

[0111] Furthermore, in the embodiment, the configuration has been described in which the base portion 11 extends in the horizontal direction H, and the longitudinal directions of the compressor 14, the condenser 13, and the evaporator 12 extend in the up-down direction Dv, but the configuration is not limited to this. For example, the base portion 11 may extend in a direction perpendicular to the horizontal direction H, and the longitudinal directions of the compressor 14, the condenser 13, and the evaporator 12 may extend in the horizontal direction H. In other words, the vehicle refrigeration cycle unit 100 may be installed sideways. Therefore, it is sufficient that the compressor 14, the condenser 13, and the evaporator 12 are fixed on the base portion 11 so that their longitudinal directions coincide with each other.

[0112] In addition, in the embodiment, the base portion 11 is described as a flat plate, but is not limited to a flat plate. The base portion 11 may be, for example, a bracket formed by bending a plate-like member formed by cutting. In this case, the base portion 11 as a bracket has a main surface 11a facing upward in the vertical direction Dv. The base portion 11 only needs to have a main surface 11a to which each device constituting the refrigerant circuit (refrigeration cycle 10) can be fixed.

[0113] Furthermore, the configuration of the vehicle refrigeration cycle unit 100 in the vehicle air conditioning system 1 described in the embodiments does not have to be limited to an independent configuration, and the vehicle refrigeration cycle unit 100 may be configured by appropriately combining the components described in each embodiment.

[0114] [Note] The vehicle refrigeration cycle unit described in each embodiment can be understood, for example, as follows.

[0115] (1) The first aspect of the vehicular refrigeration cycle unit 100 is interposed between an exterior heat exchanger 31 and an interior heat exchanger, and performs heat exchange between the secondary refrigerant R2 circulating through the exterior heat exchanger 31 and the interior heat exchanger, and includes a base portion 11 and a refrigeration cycle 10 fixed to the main surface 11a of the base portion 11 and having a compressor 14, a condenser 13, an expansion valve 16, and an evaporator 12 connected in sequence by piping through which the primary refrigerant R1 circulates, and the compressor 14, the condenser 13, and the evaporator 12 are fixed on the base portion 11 so that their longitudinal directions are aligned.

[0116] This reduces the occurrence of dead space when these components are unitized as the refrigeration cycle 10, thereby enabling the compact size of the entire refrigeration cycle 10. Furthermore, even if an exciting force is generated in the compressor 14, the refrigeration cycle 10 is integrated by the base 11 and the piping, so that the exciting force can be dispersed throughout the refrigeration cycle 10 without being unevenly distributed within the refrigeration cycle 10.

[0117] (2) The second aspect of the vehicle refrigeration cycle unit 100 is the vehicle refrigeration cycle unit 100 of (1), wherein the base portion 11 extends in the horizontal direction H so that the main surface 11a faces upward, and the compressor 14, the condenser 13, and the evaporator 12 may have their longitudinal directions extending in the vertical direction Dv.

[0118] This allows the compressor 14, the condenser 13, and the evaporator 12 to receive gravity in the longitudinal direction, making it less likely that a moment will be applied to them. Also, the area required to install the refrigeration cycle 10 on the main surface 11a of the base portion 11 can be reduced.

[0119] (3) The vehicle refrigeration cycle unit 100 according to the third aspect is the vehicle refrigeration cycle unit 100 of (1) or (2), wherein the base portion 11 extends in the horizontal direction H so that the main surface 11a faces upward, and the compressor 14 may be arranged so that the rotation axis of the compressor 14 extends in the vertical direction Dv.

[0120] This allows the compressor 14 to receive gravity in the longitudinal direction, making it less likely that a moment will be applied to them. Also, the area required to install the refrigeration cycle 10 on the main surface 11a of the base portion 11 can be reduced.

[0121] (4) The fourth aspect of the vehicle refrigeration cycle unit 100 is the vehicle refrigeration cycle unit 100 of (2) or (3), and the condenser 13 and the evaporator 12 may be plate-type heat exchangers in which heat exchange flow paths 122a, 122b, 132a, 132b extending in the vertical direction Dv are arranged in the horizontal direction H.

[0122] This allows the primary refrigerant R1 evaporated in the heat exchange passage 122a of the evaporator 12 to be guided upward in the vertical direction Dv, and the primary refrigerant R1 condensed in the heat exchange passage 132a of the condenser 13 to be guided downward in the vertical direction Dv.

[0123] (5) A fifth aspect of the vehicular refrigeration cycle unit 100 is the vehicular refrigeration cycle unit 100 according to any one of (1) to (4), wherein the refrigeration cycle 10 separates the primary refrigerant R1 that has passed through the condenser 13 into a gas phase and a liquid phase, and liquid phase The refrigerant supplying device further includes a receiver 15a that supplies only the primary refrigerant R1 to the expansion valve 16, and the receiver 15a is surrounded by the compressor 14, the condenser 13, and the evaporator 12, and the longitudinal direction of the receiver 15a may coincide with the longitudinal directions of the compressor 14, the condenser 13, and the evaporator 12.

[0124] This reduces the occurrence of dead space when the compressor 14, the condenser 13, the evaporator 12, and the receiver 15a are unitized as the refrigeration cycle 10, and the overall size of the refrigeration cycle 10 can be made more compact. [Industrial Applicability]

[0125] According to the present disclosure, it is possible to provide a refrigeration cycle unit for a vehicle that can suppress an increase in the space occupied by the refrigeration cycle. [Explanation of symbols]

[0126] 1...Vehicle air conditioning device 10...Refrigeration cycle 11...Base portion 11a...Main surface 12...Evaporator 12a, 13a...Primary refrigerant inlet portion 12b, 13b...Primary refrigerant outlet portion 12c, 13c...Secondary refrigerant inlet portion 12d, 13d...Secondary refrigerant outlet portion 13...Condenser 14...Compressor 14a...Compressor casing 14b...Suction port 14c...Discharge port 15, 15a...Receiver 16...Expansion valve 20...Interior heat medium circuit 20a...First heat medium line 20b...Second heat medium line 20c...Third heat medium line 20d...Fourth heat medium line 20e...Fifth heat medium line 20f...Sixth heat medium line 20g...Seventh heat medium line 21...Heater core 22...Cooler core 23...First pump 24...First valve 25...Second valve 30...External heat medium circuit 30a...Eighth heat medium line 30b...Ninth heat medium line 30c...Tenth heat medium line 30d...Eleventh heat medium line 30e...Twelfth heat medium line 30f...First connecting line 30g...Second connecting line 30h...Third connecting line 30i...Fourth connecting line 31...External heat exchanger 32...Second pump 33...Third valve 34...Fourth valve 35...Fifth valve 36...Battery cooler 100...Vehicle refrigeration cycle unit 120, 130...Heat exchange section 121...Evaporator plate 122a, 122b, 132a, 132b...Heat exchange flow path 124...Suction line 131...Condenser plate 135...First line 136...Pre-expansion line 143...Discharge line 156...Second line 162...Post-expansion line A1, A2...Arrangement direction B...Blower C...Vehicle body Dv...Vertical direction F...Front grill H...Horizontal direction O1...Evaporator axis O2...Compressor axis O3...Condenser axis O4...Receiver axis R1...Primary refrigerant R2...Secondary refrigerant

Claims

1. A refrigeration cycle unit for a vehicle is interposed between an exterior heat exchanger and an interior heat exchanger, and performs heat exchange between secondary refrigerants flowing through the exterior heat exchanger and the interior heat exchanger, a base portion having a flat plate shape and a main surface on one side in a plate thickness direction; a refrigeration cycle including a compressor, a condenser, an expansion valve, and an evaporator, the compressor, the ... and the evaporator being fixed to the main surface of the base portion and connected in sequence by a pipe through which a primary refrigerant flows; Equipped with the refrigeration cycle further includes a receiver that separates the primary refrigerant that has passed through the condenser into a gas phase and a liquid phase, and supplies only the liquid phase of the primary refrigerant to the expansion valve; The condenser and the evaporator are plate-type heat exchangers having a plurality of flat plates extending in the plate thickness direction and arranged with gaps between them in an arrangement direction intersecting the plate thickness direction, and the plate thickness direction is a longitudinal direction when viewed from the arrangement direction, and the arrangement direction is a longitudinal direction when viewed from the plate thickness direction, The condenser and the evaporator are arranged side by side in a direction intersecting both the arrangement direction and the plate thickness direction, the compressor is disposed at a position shifted from the condenser and the evaporator in the arrangement direction and at a position between the condenser and the evaporator in the direction in which the condenser and the evaporator are arranged, the receiver is disposed between the compressor and the condenser and the evaporator in the arrangement direction and is surrounded by the compressor, the condenser, and the evaporator; A refrigeration cycle unit for a vehicle, in which the receiver, the compressor, the condenser, and the evaporator are fixed on the base portion so that the longitudinal direction of the receiver, the longitudinal direction of the compressor, the longitudinal direction of the plates of the condenser, and the longitudinal direction of the plates of the evaporator are aligned.

2. the base portion extends horizontally with the main surface facing upward, The refrigeration cycle unit for a vehicle according to claim 1, wherein a longitudinal direction of the compressor, a longitudinal direction of the plates of the condenser, and a longitudinal direction of the plates of the evaporator coincide with a vertical direction.

3. the base portion extends horizontally with the main surface facing upward, 3. The vehicular refrigeration cycle unit according to claim 1, wherein the compressor is provided so that a rotation shaft of the compressor extends in a vertical direction.

4. 4. The refrigeration cycle unit for a vehicle according to claim 2, wherein the condenser and the evaporator have heat exchange passages extending vertically and arranged horizontally.

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