Refrigerant circulation device

Abstract

One aspect of the refrigerant circulation device disclosed herein includes: a housing having a flow path for refrigerant circulation; a pump unit capable of being inserted into and removed relative to the housing; and a panel located within the housing and having a display portion. The panel is movable between a first position overlapping with the pump unit in the insertion / removal direction of the pump unit and a second position not overlapping with the pump unit.

Description

Technical Field

[0001] This disclosure relates to a refrigerant circulation device. Prior Technology

[0002] Previously, refrigeration cycle devices were known that transferred heat received from heat sources such as CPUs (Central Processing Units) to circulating refrigerant to cool the heat source. Patent Document 1 disclosed a structure in which multiple pumps were installed in a refrigerant circulation device within a housing, and multiple pumps could be inserted and removed from the front side of the housing.

[0003] Existing technical documents: Patent document 1: TWI808418. Summary of the Invention

[0004] However, in the refrigerant circulation device described in Patent Document 1, the pump occupies a large area on the front of the housing. Therefore, even if it is desired to install a monitor that displays, for example, the operating status of the refrigerant circulation device, on the front of the housing where the user can easily visually confirm, it is difficult to ensure the space for installing the monitor.

[0005] This disclosure provides a technique for configuring a monitor on the face of a pluggable pump within a housing, even in areas with limited space.

[0006] One aspect of the refrigerant circulation device disclosed herein includes: a housing having a flow path for refrigerant circulation; a pump unit capable of being inserted into and removed relative to the housing; and a panel located within the housing and having a display portion. The panel is movable between a first position overlapping with the pump unit in the insertion / removal direction of the pump unit and a second position not overlapping with the pump unit.

[0007] The refrigerant circulation device disclosed herein allows for the placement of a monitor on the face of the plug-in pump within the housing, even in areas with limited space. Simple Explanation of the Diagram

[0008] Figure 1 is a schematic perspective view of a CDU according to an exemplary embodiment. Figure 2 is a schematic perspective view showing the interior of a CDU according to an exemplary embodiment. Figure 3 is a schematic front view of a CDU according to an exemplary embodiment. Figure 4 is a schematic side view of a CDU according to an exemplary embodiment. Figure 5 is a schematic structural diagram of a CDU according to an exemplary embodiment. Figure 6A is a perspective view illustrating a pump unit according to an exemplary embodiment. Figure 6B is a cross-sectional perspective view showing the fitting portion of the pump unit and housing according to an exemplary embodiment. Figure 7A is a cross-sectional perspective view showing the handle working part of a pump unit according to an exemplary embodiment. Figure 7B is a cross-sectional perspective view showing the restricted state of a pump unit according to an exemplary embodiment. Figure 8 is a perspective view showing the front of a CDU according to an exemplary embodiment. Figure 9 is a perspective view showing the front of a CDU according to an exemplary embodiment. Figure 10 is a top view of the panel and pump unit of an exemplary embodiment of the CDU. Figure 11 is a perspective enlarged view of the front of a CDU showing an exemplary embodiment. Figure 12 is a perspective view showing the structure of the locking part according to an exemplary embodiment. Figure 13 is a perspective view showing the structure of the locking part according to an exemplary embodiment. Figure 14 is a front view of a CDU according to an exemplary embodiment. Figure 15 is a perspective enlarged view illustrating the panel and its surrounding components of an exemplary embodiment. Figure 16 is a cross-sectional view along line XVI-XVI of Figure 4. Figure 17 is a sectional view along line XVII-XVII of Figure 4. Figure 18 is a sectional view along line XVIII-XVIII of Figure 4. Figure 19 is a cross-sectional view along line XIX-XIX of Figure 4. Implementation

[0009] Hereinafter, with reference to the accompanying drawings, a method for implementing the refrigerant circulation device of this disclosure (hereinafter referred to as "exemplary embodiments") will be described in detail. However, this disclosure is not limited to these exemplary embodiments. Furthermore, in each exemplary embodiment, the processing contents can be appropriately combined within a non-contradictory scope. In addition, in the following exemplary embodiments, the same symbols are used to mark the same parts, and repeated descriptions are omitted.

[0010] Furthermore, in the accompanying figures referred to below, to facilitate understanding, the X-axis, Y-axis and Z-axis directions, which are defined as being orthogonal to each other, are sometimes shown, and the positive Z-axis direction is set as an orthogonal coordinate system in the vertically upward direction.

[0011] (Exemplary Implementation) Next, the structure of the CDU 100 according to the exemplary embodiment will be described with reference to Figures 1 through 5. Figure 1 is a schematic perspective view of the CDU 100 according to the exemplary embodiment. Figure 2 is a schematic perspective view showing the interior of the CDU 100 according to the exemplary embodiment. Figure 3 is a schematic front view of the CDU 100 according to the exemplary embodiment. Figure 4 is a schematic side view of the CDU 100 according to the exemplary embodiment. Figure 5 is a schematic structural diagram of the CDU 100 according to the exemplary embodiment. Note that "CDU" is an abbreviation for "Coolant Distribution Unit". The CDU 100 is an example of a refrigerant circulation device.

[0012] CDU 100 controls the flow rate, temperature, water quality, or distribution destination of the refrigerant supplied from the equipment side. CDU 100 draws primary refrigerant into its interior and pressurizes it to the outside. Additionally, CDU 100 draws secondary refrigerant into its interior and pressurizes it to the outside.

[0013] CDU 100 facilitates heat exchange between the primary and secondary refrigerants. For example, antifreeze and pure water can be used as both primary and secondary refrigerants. Antifreeze solutions such as aqueous solutions of ethylene glycol and propylene glycol are examples of suitable refrigerants. Furthermore, the primary and secondary refrigerants can be the same or different. Additionally, at least one of the primary and secondary refrigerants can be a gaseous refrigerant.

[0014] The CDU 100 includes a primary flow path 1 (see Figure 5), a secondary flow path 2 (see Figure 5), a heat exchanger 3, a pump unit 4, a tank 5, a control unit 6, a wiring board 7, a panel 8, a power supply 10, and control valves 113, 232, 242, and 252 (see Figure 5). Primary flow path 1 supplies primary refrigerant. Secondary flow path 2 supplies secondary refrigerant. Primary flow path 1 and secondary flow path 2 are examples of flow paths. Details of primary flow path 1 and secondary flow path 2 are described below.

[0015] Heat exchanger 3 is connected to primary flow path 1 and secondary flow path 2. Primary and secondary refrigerants flow into and out of the interior of heat exchanger 3. Heat exchanger 3 performs heat exchange between the primary and secondary refrigerants within itself. The heat exchange method of heat exchanger 3 is, for example, plate type. The outer peripheral surface of heat exchanger 3 is covered by a heat insulation component. Tank 5, control unit 6, wiring board 7, and power supply 10 are disposed on heat exchanger 3 through the heat insulation component.

[0016] Pump unit 4 is connected to secondary flow path 2. Pump unit 4 has an internal flow path. Driven by pump unit 4, secondary refrigerant is drawn into the internal flow path of pump unit 4 and pumped out of the internal flow path of pump unit 4. Thus, secondary refrigerant circulates between CDU 100 and the external cold plate. The number of pump units 4 is not particularly limited. For example, the number of pump units 4 can be three. That is, CDU 100 can have multiple pump units 4. Multiple pump units 4 can all have the same structure and be shared design pump units. This can improve the productivity of pump units 4 and eliminate concerns about incorrect insertion positions of pump units 4. In addition, the panel 8 described later can be located on the negative X-axis side than multiple pump units 4. As a result, three pump units 4 can use the same pump unit, the couplers on the collection manifold 22 can be arranged in the Y-axis direction (with the same position in the X-axis direction), and the insertion ports of pump units 4 can be in the same plane, thus improving productivity. The structure of pump unit 4 is described below.

[0017] Tank 5 stores refrigerant used as a secondary refrigerant. Tank 5 is connected to secondary flow path 2. Tank 5 can supply refrigerant to secondary flow path 2. When the amount of secondary refrigerant circulating in secondary flow path 2 decreases, the flow rate of the circulating secondary refrigerant can be kept constant by directing the refrigerant stored in tank 5 to secondary flow path 2.

[0018] Tank 5 includes: a liquid level sensor (not shown); an observation window (not shown) that allows visual confirmation of the liquid level; an air extraction valve (not shown) that releases gas accumulated in tank 5; and a water inlet (not shown) that allows water to be injected into tank 5 when the refrigerant is reduced.

[0019] The control unit 6 controls and monitors the status of sensors 111, 112, 114~116, 211, 212, 214, 215, pump 42, control valves 113, 232, 242, 252 (see Figure 5) configured in the CDU 100.

[0020] Panel 8 has a display unit 81. The display unit 81 displays the operating status of the system and the measured values ​​of each sensor 111, 112, 114-116, 211, 212, 214, 215, etc. The structure of panel 8 is described below.

[0021] Power supply 10 supplies power to pump 42 and control valves 113, 232, 242, 252 (see Figure 5), etc. Two power supplies 10 are arranged on the first face 901 side of CDU 100.

[0022] Control valves 113, 232, 242, and 252 (refer to Figure 5) control the refrigerant flow by opening and closing the valves.

[0023] The CDU 100 has a housing 9. The housing 9 has a storage area 90. The housing 9 houses the primary flow path 1, the secondary flow path 2, the heat exchanger 3, the pump unit 4, the tank 5, the control unit 6, the wiring board 7, the power supply 10, and the control valves 113, 232, 242, and 252 in the storage area 90.

[0024] In addition, Figures 2 and 5 show an example of the structure of CDU 100, which may also include components other than those shown in Figures 2 and 5.

[0025] <Shell> Next, the housing 9 of the CDU 100 of the exemplary embodiment will be described with reference to Figures 1 to 5.

[0026] When viewed from above along the Z-axis, the storage area 90 of the housing 9 is approximately rectangular, with the X-axis as its longer side and the Y-axis as its shorter side. That is, the storage area 90 extends along the intersecting X and Y axes, having a longer dimension in the X-axis direction than in the Y-axis direction. Furthermore, the storage area 90 has a depth along the Z-axis. The width (depth) of the storage area 90 in the Z-axis direction is smaller than its width in the X and Y axes.

[0027] The housing 9 has a first surface 901 to a sixth surface 906. The first surface 901 to the sixth surface 906 surround the storage area 90. That is, the housing 9 has an area surrounded by the first surface 901 to the sixth surface 906 as the storage area 90.

[0028] The first surface 901 and the second surface 902 are arranged opposite each other in the X-axis direction, sandwiching the storage area 90. The first surface 901 is located on one side of the X-axis direction (positive X-axis side). The second surface 902 is located on the other side of the X-axis direction (negative X-axis side). In the following description, the first surface 901 is sometimes referred to as the back surface 901, and the second surface 902 is sometimes referred to as the front surface 902.

[0029] As shown in Figure 5, the first surface 901 is provided with a primary refrigerant inlet 1a and a primary refrigerant outlet 1b, and a secondary refrigerant inlet 2a and a secondary refrigerant outlet 2b. As shown in Figure 3, the second surface 902 is provided with a front handle 102. When the panel 8 is closed, the front handle 102 is visible in the main view. As a result, the front handle 102 can be used when the panel 8 is closed.

[0030] The third surface 903 and the fourth surface 904 are arranged opposite each other in the Y-axis direction, sandwiching the storage area 90. The third surface 903 is located on one side of the Y-axis direction (positive Y-axis side). The fourth surface 904 is located on the other side of the Y-axis direction (negative Y-axis side).

[0031] The fifth surface 905 and the sixth surface 906 are arranged opposite each other in the Z-axis direction, sandwiching the storage area 90. The fifth surface 905 is located on one side of the Z-axis direction (positive Z-axis side). The sixth surface 906 is located on the other side of the Z-axis direction (negative Z-axis side).

[0032] <Pump Unit> Next, the pump unit 4 of the exemplary embodiment will be described with reference to Figure 6A. Figure 6A is a perspective view showing the pump unit 4 of the exemplary embodiment.

[0033] Pump unit 4 is pluggable and removable relative to housing 9 of CDU 100. Pump unit 4 includes handle 41, pump 42, connector 43, and control board (not shown). Pump 42 and CDU 100 are connected via connector 43, thus preventing refrigerant leakage when plugging or removing pump unit 4. Connector 43 has a first component (not shown) that can be connected to pump 42 and a second component (not shown) that is fixed to CDU 100. By connecting the first and second components, refrigerant can flow between CDU 100 and pump 42.

[0034] Even in the event of refrigerant leakage due to poor connection of connector 43, the refrigerant diffusion outside the CDU 100 can be prevented by providing a liquid receiving tray (not shown) below the connection portion of connector 43. Poor connection of connector 43 occurs due to tilting movement of pump unit 4 during insertion and removal; therefore, a guide rail (not shown) is provided to allow the pump unit 4 to move vertically. This guide rail may be provided only on the lower surface of pump unit 4, or only on the upper surface. Alternatively, the guide rail may be provided on both the upper and lower surfaces of pump unit 4. The guide rail may also be tilted so that the opening is wider than the opening for pump unit 4. This allows for easy insertion of pump unit 4 into CDU 100.

[0035] The connection can be made by absorbing small displacements of the pump unit 4 by setting a floating mechanism in the second part of the connector 43.

[0036] The control board of pump unit 4 can be positioned higher than pump 42. This allows for the suppression of refrigerant-related malfunctions even in the event of liquid leakage from pump 42.

[0037] Pump unit 4 may also be equipped with a resin cover (not shown) to protect the control board and wiring.

[0038] The upper part of the sixth surface 906 of the CDU 100, which is in contact with the lower surface of the pump unit 4, is formed of a resin plate, thus allowing the pump unit 4 to be inserted and removed with minimal friction. Examples of plate types include PTFE or PFA.

[0039] The three pump units 4 can increase the flow rate of secondary refrigerant pumped from the CDU 100 by operating the three pumps 42 simultaneously. Furthermore, if the required cooling performance can be achieved with a flow rate less than that required to operate all three pump units 4, two or one pump 42 can be operated while the remaining pumps 42 are stopped.

[0040] As an example, when only two pumps 42 are running and one pump 42 is stopped, the operating pumps 42 can be switched according to the operating time to make the operating time of each pump unit 4 uniform. Therefore, it is possible to suppress the imbalance of the operating time of the pumps 42. In addition, when the pumps 42 are not running for a long time, moving parts such as impellers may become stuck, which can become a cause of failure. Therefore, by operating them periodically in a way that prevents the formation of stuck parts, it is possible to suppress the failure of the pumps 42. Furthermore, even if the pump 42 in operation fails, the operation of the failed pump 42 can be stopped and the pump 42 that is stopped can be started. Therefore, even if one pump 42 fails, it is possible to suppress the decrease in the circulation flow rate. In addition, by using a hot-swappable pump 42, the replacement of the pump 42 can be made easier, and the maintainability of the pump 42 can be improved.

[0041] Pump unit 4 may also have an indicator light 45 on its front side 47 along the insertion / removal direction (X-axis direction) to display the operating status of pump unit 4. The indicator light 45 can display the status of pump unit 4 (normal, fault, poor connection with power supply 10, etc.). The status of pump 42 can be easily confirmed by the indicator light 45.

[0042] In Figure 6A, indicator light 45 is shown as an example, but multiple indicator lights 45 can be set. Furthermore, the state of pump 42 can be identified by the flashing method or the color of the indicator light 45.

[0043] Next, the handle 41 of the pump unit 4 in the exemplary embodiment will be described further with reference to Figure 6B. Figure 6B is a cross-sectional perspective view showing the fitting portion of the pump unit 4 and the housing 9 in the exemplary embodiment.

[0044] The handle 41 is rotatably fixed to two sides of the pump unit 4 that are orthogonal to the insertion / removal direction (X-axis direction), and is located on the front side 47 of the pump unit 4 along the insertion / removal direction, and protrudes in a direction further away from the housing 9 (negative X-axis direction) than the front side 47.

[0045] Specifically, the handle 41 includes a handle working part 411, two handle sides 412, a rotating support part 413, and an opposing part 414. The handle working part 411 is located outside the housing 9 when the pump unit 4 is inserted into the housing 9. The operation content can also be displayed on the handle working part 411. This can suppress user operation errors. Furthermore, as shown in Figure 3, when the panel 8 is closed, it does not overlap with the handle working part 411 of the adjacent pump unit 4 when viewed from the front.

[0046] Two handle sides 412 are located on opposite sides of the pump unit 4. One end of each handle side 412 is connected to a handle working part 411, and the other end is fixed to the side of the pump unit 4 via a rotating support part 413. That is, the handle working part 411 connects the two handle sides 412. At the other end of each handle side 412, there is a facing part 414 that opposes the protrusion 99 of the housing 9. The protrusion 99 protrudes from the facing surface of the housing 9 opposite to the side of the pump unit 4 in a direction intersecting the insertion / removal direction of the pump unit 4 (Y direction).

[0047] The handle 41 is movable in a third and a fourth position. Specifically, when the handle 41 is in the third position, the two handle sides 412 extend in a direction orthogonal to the front face 47 of the pump unit 4 (X-axis direction), and at least a portion of one end of each of the two handle sides 412 is located on the side closer to the front face (X-axis negative direction side). Simultaneously, the handle working part 411 is located on the side closer to the front face 47 (X-axis negative direction side). On the other hand, when the handle 41 is in the fourth position, as shown in Figure 6A, the two handle sides 412 extend along both sides of the pump unit 4, and the handle working part 411 is located on the side closer to the front face 47 (X-axis negative direction side), and is located at the lower part of the front face 47 when viewed from the front. When the handle 41 is in the third position, compared to when the handle 41 is in the fourth position, the handle working part 411 is located on the upper side (Z-axis positive direction side). That is, when the handle 41 is in the third position, the handle 41 is in an upward state, and when the handle 41 is in the fourth position, the handle 41 is in a downward state. The handle side 412 rotates about a rotation axis extending in a direction intersecting the insertion and removal direction (Y-axis direction) by means of the rotation support 413, thereby allowing the handle 41 to be displaced in the third and fourth positions.

[0048] Next, the insertion step of the pump unit 4 into the CDU 100 according to the exemplary embodiment will be described.

[0049] First, insert the pump unit 4 into the CDU 100 with the handle 41 in the raised position, i.e., in the third position. Next, when the distance between the front surface 902 of the CDU 100 and the front surface 47 of the pump unit 4 is a predetermined distance, for example, approximately 10 mm, insert the pump unit 4 into the CDU 100 while lowering the handle 41. At this time, the opposing portion 414 of the handle 41 contacts the protrusion 99 of the housing 9 of the CDU 100. By lowering the handle 41, the pump unit 4 is inserted using the protrusion 99 as a fulcrum.

[0050] When the handle 41 is in the lowered position, i.e., when the handle 41 is in the fourth position, the opposing part 414 is located further inside the pump unit 4 in the insertion direction (positive X-axis direction) than the protrusion 99. The opposing part 414 and the protrusion 99 are in a state of overlap in the insertion and removal direction (X-axis direction) of the pump unit 4, i.e., in a state of opposition, and the pump unit 4 cannot be pulled out from the CDU 100.

[0051] The pump unit 4, by having two rotating support parts 413, suppresses the displacement of the rotating support part 413, which is only applied to one side due to the handle movement when the handle 41 is lowered, in a direction perpendicular to the insertion and removal direction (Y-axis direction).

[0052] Next, the steps for removing the pump unit 4 in the exemplary embodiment will be described.

[0053] Next, with the handle 41 in the fourth position pressed, the operating section 461 is lowered, causing the handle 41 to rise. At this time, by pulling the handle 41 towards the front side of the CDU 100, the handle 41 rotates around the rotating support 413, moving the handle 41 from the fourth position to the third position. This results in the opposite portion 414 of the handle side 412 and the protrusion 99 not overlapping in the insertion / removal direction (X-axis direction) of the pump unit 4, i.e., not facing each other, allowing the pump unit 4 to be pulled out of the CDU 100. The operating section 461 will be described below.

[0054] After the handle 41 has risen to the third position, the handle working part 411 of the pump unit 4 is pulled out from the CDU 100.

[0055] Next, the limitations on the movement of the pump unit 4 in the exemplary embodiment will be further described with reference to Figures 7A and 7B. Figure 7A is a cross-sectional perspective view showing the handle working part 411 of the pump unit 4 in the exemplary embodiment. Figure 7B is a cross-sectional perspective view showing the limited state of the pump unit 4 in the exemplary embodiment.

[0056] As shown in Figures 6A and 7B, the pump unit 4 includes a limiting part 46 that restricts the handle 41 from moving to the third position when the handle 41 is in the fourth position. In other words, the limiting part 46 restricts the handle 41 from rising when it is in the lowered state.

[0057] The limiting part 46 includes an operating part 461, an elastic member 462, and a plate part 463. The operating part 461 is movable in a fifth position and a sixth position. Specifically, the fifth position means that the operating part 461 is located on the positive Z-axis side in the through hole 472 on the front side 47. The sixth position means that, as shown in Figure 6A, the operating part 461 is located on the negative Z-axis side in the through hole 472 on the front side 47. That is, when the operating part 461 is in the fifth position, the operating part 461 is in a raised state, and when the operating part 461 is in the sixth position, the operating part 461 is in a lowered state.

[0058] The elastic member 462 applies force to the operating part 461 in the direction from the sixth position toward the fifth position (positive Z-axis direction). As shown in Figure 7B, the plate part 463 is connected to the operating part 461 on the back side of the front side 47 of the pump unit 4.

[0059] The limiting unit 46 restricts the movement of the operating unit 461 from the sixth position to the fifth position by moving the operating unit 461 along with the movement of the handle 41 from the third position to the fourth position. On the other hand, when the operating unit 461 moves from the fifth position to the sixth position, the state in which the movement of the handle 41 is restricted to the third position is released.

[0060] Thus, by having a limiting part 46, the CDU 100 can prevent the handle 41 from moving to the third position due to accidental operation, which would cause the pump unit 4 to detach from the CDU 100. Furthermore, since the limiting part 46 has an operating part 461, the state of the limiting part 46 can be changed by the user's operation.

[0061] Furthermore, as shown in Figure 7A, the handle working part 411 has a through part 4111, which is inserted into a through hole 471 provided on the front side 47 of the pump unit 4. The through part 4111 has: an inclined part 4112 that is inclined in the direction of insertion into the through hole 471; and an opposing part 4113 that is not inclined.

[0062] After the pump unit 4 is inserted into the CDU 100, when the handle 41 is lowered, the through portion 4111 of the handle working part 411 is inserted into the through hole 471, and the plate portion 463 and the opposing portion 4113 are opposite each other in the insertion / removal direction (X-axis direction). The operating part 461 and the plate portion 463 are pulled upward in the vertical direction (positive Z-axis direction side) by the elastic member 462. As long as the user does not lower the operating part 461, at least a portion of the plate portion 463 is in a position opposite to the through hole 471 (see Figure 7B). Therefore, the user is prevented from raising the handle 41. In other words, the movement of the handle 41 to the third position is restricted.

[0063] That is, when the through part 4111 passes through the through hole 471, the opposing part 4113 and the plate part 463 are opposite each other in the insertion and removal direction. Therefore, as long as the user does not lower the operating part 461, the through part 4111 is prevented from coming out of the through hole 471.

[0064] When the user lowers the operating part 461, the elastic member 462 extends and the plate part 463 also lowers and is no longer opposite to the opposing part 4113. Therefore, the through part 4111 can disengage from the through hole 471, and the handle 41 can be moved.

[0065] <Panel and Display Section> Next, the panel 8 and display unit 81 of the exemplary embodiment will be described with reference to Figures 8 to 11. Figures 8 and 9 are perspective views showing the front 902 of the CDU 100 of the exemplary embodiment. Figure 10 is a top view showing the panel 8 and pump unit 4 of the CDU 100 of the exemplary embodiment. Figure 11 is an enlarged perspective view showing the front 902 of the CDU 100 of the exemplary embodiment.

[0066] The panel 8 may also include a first component 8a, a second component 8b, and a support portion 8c. The first component 8a has a display portion 81.

[0067] The display unit 81 displays data such as the operating status of the pump 42 or control valves 113, 232, 242, 252 and refrigerant temperature obtained from sensors 111, 112, 114~116, 211, 212, 214, 215 (see Figure 5).

[0068] The display unit 81 may also have an operation surface for receiving user operations. The display unit 81 may be, for example, a touch panel display. As a touch panel display, the display unit 81 may be a flat panel display such as a liquid crystal display or an organic EL display. As a touch panel display, the display unit 81 can set the control method for the pump 42, such as controlling it to reach below the dew point or switching the operation of the pump 42 according to the operating time. Furthermore, as a touch panel display, the display unit 81 can set the upper and lower limits of the secondary refrigerant temperature, for example, adjusting the pump 42 speed and the flow rate of the primary refrigerant into the heat exchanger 3 to ensure the refrigerant temperature falls within the set temperature range.

[0069] Thus, the display unit 81 has an operating surface, allowing the user to check the operating status of the CDU 100 and to make various settings based on the operating status of each part within the CDU 100.

[0070] The second component 8b is, for example, a cover component that covers the first component 8a. Specifically, the second component 8b has: a cover surface located at a position offset from the first component 8a in a direction orthogonal to the display portion 81 and away from the housing 9 (negative X-axis direction); and a side surface connected to the cover surface and extending in a direction orthogonal to the cover surface and closer to the housing 9 (positive X-axis direction). The cover surface is the surface opposite to the display portion 81. As shown in Figure 9, the first component 8a is located in the space formed by the cover surface and the side surface.

[0071] The second component 8b has an opening 801. The opening 801 is rectangular in shape and is disposed in the cover at a position corresponding to the display portion 81. Specifically, the size of the opening 801 may be larger than the size of the display portion 81. The opening 801 is located at a position that overlaps with the display portion 81 in a direction orthogonal to the display portion 81 of the panel 8 (X-axis direction).

[0072] The second component 8b may also have an opening 802. The opening 802 is provided in the cover at a position corresponding to the locking part 83 described later. The opening 802 is located at a position that overlaps with the locking part 83 in a direction orthogonal to the display part 81 of the panel 8 (X-axis direction).

[0073] The vertical dimension (Z-axis direction) of the second component 8b can be larger than the vertical dimension (Z-axis direction) of the first component 8a.

[0074] Here, the panel 8 of the CDU 100 in the exemplary embodiment is movable in a first position and a second position. When the panel 8 is in the first position, as shown in Figure 8, the panel 8 is located at a position that overlaps with the pump unit 4 in the insertion / removal direction (X-axis direction). When the panel 8 is in the second position, as shown in Figures 9 and 10, the panel 8 is located at a position that does not overlap with the pump unit 4 in the insertion / removal direction (X-axis direction).

[0075] According to the above structure, even with limited space, the pump unit 4 and the panel 8 with the display unit 81 can be configured. In addition, since both the pump unit 4 and the display unit 81 can be configured on the front 902 of the CDU 100, it is easy to insert and remove the pump unit 4 relative to the CDU 100 and to visually confirm the display unit 81, thereby improving workability.

[0076] Specifically, panel 8 can also be rotatably supported on the front surface 902 of CDU 100 via support portion 8c about rotation axis A1. Support portion 8c is, for example, a hinge. Panel 8 can also have two support portions 8c. One of the two support portions 8c can be connected to the first component 8a of panel 8, and the other can be connected to the second component 8b of panel 8.

[0077] Panel 8 can be rotated about a rotation axis A1 extending in the vertical direction (Z-axis direction) via support 8c, thereby being able to move in a first position and a second position. When panel 8 is in the first position, as shown in Figure 8, panel 8 is located along the front surface 902 (X-axis and Z-axis directions) of CDU 100. In this case, panel 8 is arranged overlapping the front surface 47 of pump unit 4 in the insertion / removal direction (X-axis direction) of pump unit 4, therefore, pump unit 4 cannot be inserted or removed relative to CDU 100.

[0078] With panel 8 in the second position, panel 8 is positioned along a direction intersecting the front face 902 of CDU 100. In this case, panel 8 and pump unit 4 are configured without overlapping in the insertion / removal direction (X-axis direction) of pump unit 4, thus allowing pump unit 4 to be inserted / removed relative to CDU 100. Furthermore, in this case, operation of the back side of the second component 8b, which has display section 81, becomes easier, thus enabling easy maintenance of wiring (not shown), such as communication cables connected to control unit 6.

[0079] Furthermore, the panel 8 can rotate around the rotation axis A1 via the support 8c, thereby enabling the CDU 100 to be configured in a space-saving manner in the height direction (Z-axis direction).

[0080] Additionally, Figures 9 and 10 show an example where panel 8 is in the second position, positioned along a direction orthogonal to the front face 902 of CDU 100 (Y-axis direction), i.e., rotated approximately 90 degrees about the rotation axis A1 from the state where panel 8 is in the first position, but this is not a limitation. Panel 8 can also be rotated more than 90 degrees about the rotation axis A1 from the state where it is in the first position. In other words, the second position of panel 8 can also be a position after rotating more than 90 degrees about the rotation axis A1 from the state where panel 8 is in the first position.

[0081] Furthermore, an example is shown here where panel 8 can rotate about the rotation axis A1 in a first position and a second position, but the movement of panel 8 is not limited to rotation. For example, panel 8 can also move by sliding in the first and second positions.

[0082] Viewed from the vertical direction (Z-axis direction), the support portion 8c is positioned to overlap with the front handle 102 of the front face 902 of the CDU 100. Specifically, one of the two support portions 8c is positioned on the vertical side (positive Z-axis side) of the front handle 102, and the other is positioned on the vertical side (negative Z-axis side) of the front handle 102. Thus, the support portions 8c are positioned separately in the Z-axis direction, thereby enabling stable rotation of the panel 8.

[0083] The support portion 8c can be positioned on the second surface 902 of the housing 9 closer to the third surface 903 than the plurality of pump units 4. Therefore, compared to the case where the support portion 8c is located between the plurality of pump units 4 on the second surface 902, the panel 8 is less likely to interfere with the insertion and removal of the pump units 4 when the panel 8 is in the second position. This improves the operability of inserting and removing the pump units 4. Alternatively, the support portion 8c can also be positioned on the second surface 902 of the housing 9 closer to the fourth surface 904 than the plurality of pump units 4.

[0084] As described above, the CDU 100 may include multiple pump units 4. In this case, at least one of the multiple pump units 4 may overlap with the panel 8 located in the first position in the insertion / removal direction (X-axis direction) of the pump unit 4.

[0085] By incorporating multiple pump units 4, even if one pump unit 4 fails, the operation of the other pump units 4 can suppress the reduction in refrigerant flow. Therefore, the CDU 100 has high reliability. Furthermore, even with multiple pump units 4 that can be plugged into the housing 9, the panel 8 and the pump units 4 can be configured on the front 902, thus allowing for the configuration of both pump units 4 and panel 8 even in areas with limited space.

[0086] Additionally, Figure 8 shows an example where one of the multiple pump units 4 and the panel 8 located in the first position overlap in the insertion / removal direction (X-axis direction) of the pump unit 4, but the number of pump units 4 overlapping with the panel 8 is not limited to this. Alternatively, multiple pump units 4 may overlap with the panel 8 in the insertion / removal direction of the pump unit 4. This ensures a larger area for the display section 81.

[0087] Furthermore, the CDU 100 may also have multiple panels 8. For example, the CDU 100 may also have two panels 8. In this case, one panel 8 may be located in a position that allows it to rotate between a first position and a second position via a support portion 8c provided in the second surface 902 of the housing 9, which is located closer to the third surface 903 than the multiple pump units 4. The other panel 8 may be located in a position that allows it to rotate between a first position and a second position via a support portion 8c provided in the second surface 902, which is located closer to the fourth surface 904 than the multiple pump units 4. Alternatively, with both panels 8 in the first position, both panels 8 may be located in a position that completely overlaps with the multiple pump units 4. That is, it may also be a so-called double-door structure. This further ensures that the area of ​​the display section 81 is larger.

[0088] As shown in Figures 8 and 11, the handle 41 of the pump unit 4 can overlap with the panel 8 in the insertion / removal direction (X-axis direction) of the pump unit 4 when the panel 8 is in the first position. Specifically, the handle 41 can overlap with the second component 8b of the panel 8 in the insertion / removal direction (X-axis direction) of the pump unit 4 when the panel 8 is in the first position. Furthermore, a portion of the handle side 412 of the handle 41 can overlap with the first component 8a of the panel 8 in the insertion / removal direction (X-axis direction) of the pump unit 4 when the panel 8 is in the first position.

[0089] Thus, by positioning the handle 41 and the panel 8 in a position that overlaps in the insertion / removal direction (X-axis direction) of the pump unit 4, it is possible to reduce the misoperation of the handle 41 when the panel 8 is in the first position.

[0090] Specifically, as shown in Figure 11, with the panel 8 in the first position, the two handle sides 412 of the handle 41 extend in the vertical direction (Z-axis direction), and the handle working part 411 is located at the lower part of the front face 47 of the pump unit 4. That is, the handle 41 can be in the fourth position of the lowered state.

[0091] In this state, the display unit 81 can be located between the two handle sides 412 and above the handle working part 411.

[0092] According to the above structure, the handle 41, which is located at a position protruding from the front 47 of the pump unit 4, is arranged without overlapping with the display 81, thereby enabling the housing 9 to save space in the direction (X-axis direction) along the insertion and removal direction of the pump unit 4.

[0093] As shown in Figure 8, the panel 8 may have a plurality of through holes 803 located below the display section 81. Specifically, the second component 8b of the panel 8 may also have a plurality of through holes 803 located below the opening 801.

[0094] Thus, the panel 8 has multiple through holes 803, so even when the panel 8 is in the first position, that is, when the panel 8 covers the front 47 of the pump unit 4, air can still be supplied to the pump unit 4 through the through holes 803.

[0095] As shown in Figures 8 and 11, the panel 8 may also have a locking part 83 that restricts the movement of the panel 8 from the first position to the second position. Specifically, the locking part 83 may also be provided in the first component 8a of the panel 8. The locking part 83 may be provided in the first component 8a of the panel 8 at a position lower than the display part 81.

[0096] Referring to Figures 12 and 13, the structure of the locking part 83 of the exemplary embodiment will be described. Figures 12 and 13 are perspective views showing the structure of the locking part 83 of the exemplary embodiment.

[0097] The locking part 83 includes a sliding rod 831, a spring (not shown), and an operating part 832. The front side 902 of the CDU 100 is provided with a plate member 103 that protrudes in the direction away from the housing 9 (negative X-axis direction), and the plate member 103 has a hole 103a through which the sliding rod 831 can be inserted.

[0098] The sliding rod 831 can slide in the direction of the panel 8 and in a direction orthogonal to the rotation axis A1 (Y-axis direction). The sliding rod 831 is subjected to force by a spring toward the hole 103a of CDU 100. The operating part 832 can rotate about the rotation axis A2 and is connected to the sliding rod 831.

[0099] When panel 8 is in the first position, one end of sliding rod 831 is inserted into hole 103a under the action of spring. In this state, sliding rod 831 interferes with the inner wall of hole 103a, so the movement of panel 8 from the first position to the second position is restricted.

[0100] When the operating part 832 provided on the panel 8 is rotated about the rotation axis A2, the sliding rod 831 slides away from the hole 103a (positive Y-axis direction) and disengages from the hole 103a, thus releasing the restriction state. As a result, the panel 8 can rotate and can move from the first position to the second position.

[0101] Thus, the panel 8 has a locking part 83, which can reduce the movement of the panel 8 caused by accidental operation from the first position to the second position.

[0102] Furthermore, the locking part 83 is not limited to the cases shown in Figures 8 and 11 to 13. For example, the locking part 83 may also be a threaded part that screws the front surface 47 of the panel 8 and the pump unit 4. In this case, it is also possible to reduce movement of the panel 8 caused by accidental operation from the first position to the second position, and to prevent the panel 8 from moving at an unexpected time and thus preventing the display part 81 from being checked.

[0103] Panel 8 can also restrict its movement from the second position to the first position. For example, the movement of panel 8 from the second position to the first position can also be restricted by a so-called snap-fit ​​structure.

[0104] Specifically, when panel 8 is opened at a predetermined angle, i.e. rotated from the first position to the second position, the protrusion (not shown) provided on panel 8 and the recess (not shown) provided on CDU 100 interfere with each other, the protrusion enters the recess, and thus panel 8 is fixed in the second position.

[0105] In this state, even if you want to rotate panel 8 from the second position to the first position, the movement is inhibited because the protrusion touches the side wall of the recess. Therefore, unless the user presses the protrusion or does something to release the restriction, panel 8 cannot be rotated to the first position.

[0106] Thus, by restricting the movement of panel 8 from the second position to the first position, the movement in the closing direction is suppressed when panel 8 is opened for insertion or removal of pump unit 4, thereby preventing panel 8 from being caught in the insertion or removal operation.

[0107] Next, the through-hole 84 and space 85 of the panel 8 in the exemplary embodiment will be described with reference to Figures 14 and 15. Figure 14 is a front view of the CDU 100 of the exemplary embodiment. Figure 15 is a perspective enlarged view showing the panel 8 and its surrounding components of the exemplary embodiment. In addition, in Figure 14, the first component 8a, the second component 8b, and the support portion 8c of the panel 8 are omitted.

[0108] As shown in Figure 15, the panel 8 may also have a transmission portion 84. When the panel 8 is in the first position, the transmission portion 84 overlaps with the indicator lamp 45 of the pump unit 4 in the insertion / removal direction (X-axis direction) of the pump unit 4. The transmission portion 84 allows light from the indicator lamp 45 to pass through.

[0109] Specifically, the transmission portion 84 may include: a first transmission portion 841 of the first component 8a; and a second transmission portion (not shown) of the second component 8b. The first transmission portion 841 may be, for example, a cylindrical component. When the panel 8 is in the first position, the first transmission portion 841 extends in a direction orthogonal to the front surface 47 of the pump unit 4 (X-axis direction). The through hole of the first transmission portion 841 overlaps with the indicator lamp 45 in the insertion / removal direction (X-axis direction) of the pump unit 4. The second transmission portion may be made of a transparent or translucent component. For example, the second transmission portion may be formed of a light-transmitting material such as glass or acrylic resin. In this case, the light from the indicator lamp 45 can be visually confirmed by the user through the through hole of the first transmission portion 841 and the second transmission portion.

[0110] Thus, the panel 8 has a transmission portion 84, so that even when the panel 8 is in the first position, that is, when the panel 8 covers the front 47 of the pump unit 4, the user can easily visually confirm the display of the indicator light 45 through the transmission portion 84 and confirm the operating status of the pump unit 4.

[0111] As shown in Figures 14 and 15, the panel 8 may also have a space 85 located between the pump unit 4 and the housing 9. The space 85 is located between a first side surface 48 in the pump unit 4 orthogonal to the insertion / removal direction (X-axis direction) and a second side surface 910 in the housing 9 opposite to the first side surface 48. Specifically, the second side surface 910 has a recess 910a at its end on the fifth surface 905 side, recessed from the second side surface 910 towards the third surface 903. The space 85 is formed by the aforementioned recess 910a and the first side surface 48. In this case, the wiring (not shown) connected to the display unit 81 can be located in the space 85. For example, one end of the wiring is connected to the back of the display unit 81, and the other end is connected to the control unit 6 (refer to Figure 2). Signals from the control unit 6 are output to the display unit 81 via the wiring.

[0112] Thus, the panel 8 has a space 85 between the pump unit 4 and the housing 9, and the wiring is located in the space 85. Therefore, compared with the case without the space 85, it is easier to wind the wiring.

[0113] Alternatively, there may be a space (not shown) between the first component 8a and the display unit 81. This space may also allow for wiring to be wound. Therefore, compared to the case where there is no space, wiring is easier to wound, and damage to the wiring can be prevented.

[0114] Furthermore, an example of panel 8 having a first component 8a and a second component 8b is shown here, but the structure of panel 8 is not limited to this. Panel 8 may also only have the first component 8a with a display section 81. In this case, panel 8 is also movable in a first position and a second position, thus allowing panel 8 and pump unit 4 to be arranged in a limited area.

[0115] In this case, the support portion 8c connected to the first component 8a may also have an extension portion (not shown) connecting the support portion 8c and the first component 8a. Since a space can be provided between the first component 8a and the housing 9 via the extension portion, when the panel 8 is in the first position, the handle side portion 412 can be configured not to contact the display portion 81 within the space between the first component 8a and the housing 9.

[0116] <Primary flow path and secondary flow path> Next, the primary flow path 1 and secondary flow path 2 of the exemplary embodiment will be described with reference to Figures 5 and 16 through 19. Figure 16 is a cross-sectional view along line XVI-XVI of Figure 4. Figure 17 is a cross-sectional view along line XVII-XVII of Figure 4. Figure 18 is a cross-sectional view along line XVIII-XVIII of Figure 4. Figure 19 is a cross-sectional view along line XIX-XIX of Figure 4. In Figures 16 through 19, the primary flow path 1 is represented by dashed arrows, and the secondary flow path 2 is represented by solid arrows. Furthermore, the direction in which the arrows point indicates the direction of refrigerant flow.

[0117] The primary refrigerant flowing in the primary flow path 1 flows in from the primary inlet 1a located on the back side 901 of the CDU 100, flows in the heat exchanger 3, and flows out from the primary outlet 1b.

[0118] Furthermore, as a variation of this embodiment, the primary flow path 1 may also include a bypass flow path (not shown) that does not flow into the heat exchanger 3 but merges with the primary outlet 1b. By including the bypass flow path, the amount of primary refrigerant flowing into the heat exchanger 3 can be adjusted, thus suppressing excessive temperature drop in the heat exchanger 3 and the generation of condensation.

[0119] Secondary refrigerant flowing in secondary flow path 2 enters from the secondary inlet 2a located on the back side 901 of CDU 100, flows into the heat exchanger, and then flows into each pump 42 via the distribution manifold 21. The secondary refrigerant pumped by the pump 42 merges through the collecting manifold 22 and flows out from the secondary outlet 2b. In secondary flow path 2, the flow path from the heat exchanger 3 to the distribution manifold 21 is connected to the tank 5.

[0120] By using the collection manifold 22 and the distribution manifold 21, the flow paths can be connected to each other without setting up separate flow paths from the heat exchanger 3 to each pump 42, thus saving space.

[0121] As shown in Figures 16 and 17, the collection manifold 22 and the distribution manifold 21 are arranged overlapping in the vertical direction (Z-axis direction). Furthermore, the collection manifold 22 and the distribution manifold 21 are arranged in the X-axis direction between the heat exchanger 3 and the pump unit 4. This arrangement allows for a space-saving arrangement of the secondary refrigerant flow path from the heat exchanger 3, enabling the heat exchanger 3 to be larger.

[0122] As shown in Figures 16 and 17, the tank 5, power supply 10, and flow path extending from the collection manifold 22 to the secondary outlet 2b in the secondary flow path 2 are arranged above the heat exchanger 3. Therefore, the horizontal space (X-axis and Y-axis directions) within the CDU 100 can be allocated to the heat exchanger 3, enabling the heat exchanger 3 to be larger and improving the cooling performance of the CDU 100.

[0123] As shown in Figure 18, the flow path in primary flow path 1 from primary inlet 1a to heat exchanger 3, the flow path from heat exchanger 3 to primary outlet 1b, and the flow path in secondary flow path 2 from secondary inlet 2a to heat exchanger 3 are arranged in the X-axis direction between the back surface 901 and heat exchanger 3. This allows for a space-saving arrangement of the flow path tubes in primary flow path 1 and secondary flow path 2. Therefore, it is easier to enlarge heat exchanger 3, thus improving cooling performance.

[0124] As shown in Figures 18 and 19, the heat exchanger 3 has a primary refrigerant inlet and outlet, and a secondary refrigerant inlet on one side (positive X-axis direction), and a secondary refrigerant outlet on the other side (negative X-axis direction). Furthermore, the pump unit 4 is located on the other side (negative X-axis direction) of the heat exchanger 3, thus improving the flexibility of the primary flow path 1 and the secondary flow path 2.

[0125] As shown in Figure 5, the CDU 100 may include control valves 113, 232, 242, and 252, and sensors 111, 112, 114-116, 211, 212, 214, and 215. Additionally, sensors of undescribed types may be provided in locations not shown.

[0126] Alternatively, this technology can also adopt the following structure.

[0127] (1) A refrigerant circulation device comprising: a housing having a flow path for refrigerant to flow through; a pump unit being pluggable relative to the housing; and a panel located on the housing and having a display portion, the panel being movable between a first position overlapping with the pump unit in the pluggable direction of the pump unit and a second position not overlapping with the pump unit.

[0128] (2) In the refrigerant circulation device described in (1), there are a plurality of said pump units, at least one of said pump units overlapping the panel located at the first position in the insertion / removal direction of the pump unit.

[0129] (3) In the refrigerant circulation device described in (2), the pump unit has a handle located on the front side of the pump unit along the insertion / removal direction and protruding further away from the housing than the front side. When the panel is in the first position, the handle overlaps with the panel in the insertion / removal direction of the pump unit.

[0130] (4) In any of (1) to (3) the refrigerant circulation device, the panel has a locking part that restricts the panel from moving from the first position to the second position.

[0131] (5) In any of (1) to (4) the refrigerant circulation device, the panel restricts the panel from moving from the second position to the first position.

[0132] (6) In any of (1) to (5) the refrigerant circulation device, the pump unit is provided with an indicator light to display the operating status of the pump unit, and the panel is provided with a transparent portion, wherein when the panel is in the first position, the transparent portion overlaps with the indicator light in the insertion and removal direction of the pump unit.

[0133] (7) In the refrigerant circulation device described in (2) or (3), the pump unit has a handle, the handle having: two handle sides located on two sides of the pump unit orthogonal to the insertion / removal direction; and a handle working part connected to one end of the two handle sides and connecting the two handle sides. When the panel is in the first position, the two handle sides of the handle extend in the vertical direction, and the handle working part is located at the lower part of the front side of the pump unit along the insertion / removal direction. When the panel is in the first position, the display part is located between the two handle sides and above the handle working part.

[0134] (8) In any of (1) to (7) the refrigerant circulation device, the panel has a plurality of through holes located below the display section.

[0135] (9) In any of (1) to (8) the refrigerant circulation device, the panel has a space between a first side orthogonal to the insertion / removal direction in the pump unit and a second side opposite to the first side in the housing, and the wiring connected to the display unit is located in the space.

[0136] (10) In any of (1) to (9) the refrigerant circulation device, the display unit has an operation surface for receiving user operations.

[0137] 1: Primary flow path 1a: Primary flow inlet 1b: Primary outlet 102: Front handle 103: Plate component 103a: Hole 2: Secondary flow path 2a: Secondary flow inlet 2b: Secondary Flow Outlet 21: Distribution manifold 22: Collect manifold 3: Heat exchanger 4: Pump Unit 41: Handle 411: Handle Work Section 4111: Penetrating part 4112: Inclined section 4113: Relative part 412: Handle side 413: Rotary support section 414: Relative Part 42: Pump 43: Connector 45: Indicator Light 46: Restriction Section 461: Operations Department 462: Elastic component 463: Plate section 47: Front 471, 472, 803: Through holes 48: First side view 5: Can 6: Control Unit 7: Wiring board 8: Panel 8a: First component 8b: Second component 8c: Support section 81: Display Section 801: Opening 802: Opening 83: Locking section 831: Sliding rod 832: Operations Department 84: Through the department 841: First Transmission Section 85: Space 9: Shell 90: Storage Area 99:convex part 901: Back side, first side 902: Front, Second Side 903: Third Page 904: Fourth Page 905: The Fifth Page 906: Sixth Page 910: Second side view 910a: concave part 10: Power supply 100:CDU 111, 112, 114~116, 211, 212, 214, 215: Sensors 113, 232, 242, 252: Control valves A1, A2: Rotation axes X, Y, Z: Axis directions X+, Y+, Z+: Positive direction side X-, Y-, Z-: Negative direction side XVI-XVI: Line XVII-XVII: Line XVIII-XVIII: Line XIX-XIX: Line

[0138] Domestic storage information (please note in order of storage institution, date, and number) none Overseas storage information (please note in the order of storage country, institution, date, and number) none

Claims

1. A refrigerant circulation device, comprising: a housing having a flow path for refrigerant to flow through; at least one pump unit capable of being inserted and removed relative to the housing; and a panel located on the housing and having a display portion, the pump unit comprising a plurality of pump units in the same insertion and removal direction, the plurality of pump units including a first pump unit and a second pump unit adjacent to the first pump unit, the panel being movable between a first position overlapping with the first pump unit in the insertion and removal direction and a second position not overlapping with the first pump unit, wherein when the panel is located in the first position, the panel does not overlap with the second pump unit in the insertion and removal direction, and the second pump unit can be inserted and removed.

2. The refrigerant circulation device as claimed in claim 1, wherein at least one of the first pump units overlaps with the panel located at the first position in the insertion / removal direction.

3. The refrigerant circulation device as claimed in claim 2, wherein the first pump unit has a handle located on the front side of the first pump unit along the insertion / removal direction and protruding further away from the housing than the front side, wherein the handle overlaps with the panel in the insertion / removal direction when the panel is in the first position.

4. The refrigerant circulation device as claimed in claim 1, wherein the panel has a locking portion that restricts the panel from moving from the first position to the second position.

5. The refrigerant circulation device as claimed in claim 1, wherein the panel restricts the panel from moving from the second position to the first position.

6. The refrigerant circulation device as claimed in claim 1, wherein the first pump unit includes an indicator light for displaying the operating status of the first pump unit, and the panel includes a transmission portion, wherein, in the state where the panel is in the first position, the transmission portion overlaps with the indicator light in the insertion / removal direction.

7. The refrigerant circulation device as claimed in claim 1, wherein the first pump unit includes a handle, the handle having: two handle sides located on two sides of the first pump unit orthogonal to the insertion / removal direction; and a handle working part connected to one end of the two handle sides and connecting the two handle sides, wherein in the state where the panel is in the first position, the two handle sides of the handle extend in a vertical direction, the handle working part is located at the lower part of the front side of the first pump unit along the insertion / removal direction, and in the state where the panel is in the first position, the display part is located between the two handle sides and above the handle working part.

8. The refrigerant circulation device as claimed in claim 1, wherein the panel has a plurality of through holes located below the display portion.

9. The refrigerant circulation device as claimed in claim 1, wherein the panel has a space between a first side orthogonal to the insertion / removal direction in the first pump unit and a second side opposite to the first side in the housing, and the wiring connected to the display unit is located in the space.

10. The refrigerant circulation device as claimed in claim 1, wherein the display unit has an operating surface for receiving user operations.

Images