Water Server

Abstract

To increase a practical cooling efficiency of a cold water tank by making a heat radiation part on a back face of a housing of a water server easy to clean.SOLUTION: In the water server having a heat radiation part 22 of a cooling device 20 provided on the back face of a housing 1, a bottom plate 10 vertically opposing a floor face F is provided on a bottom edge of the housing 1. The bottom plate 10 includes a roller 33 that rolls on the floor face F in a front-rear direction, and a roller lock mechanism 34 capable of switching between a roller lock state in which a rotation of the roller 33 is restricted and a roller lock release state in which a rotation restriction of the roller 33 is released.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a water server. [Background technology]

[0002] Traditionally, water servers have been used mainly in offices, hospitals, etc., but in recent years, growing interest in water safety and health has led to water servers becoming more common in ordinary homes. A water server generally has a housing placed on the floor, a cold water tank installed inside the housing, a cooling device for cooling the cold water tank, a cold water outlet installed on the front of the housing, and a cold water outlet path that connects the cold water tank and the cold water outlet. By opening a valve installed in the cold water outlet path, delicious cold water can be enjoyed immediately at any time, making it highly convenient (e.g., Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2020-011762 Summary of the Invention [Problem to be solved by the invention]

[0004] The inventors of this application have studied how to improve the cooling efficiency of water dispensers, especially in the summer when cold water consumption is high. As a result of their study, they have noticed that the cooling efficiency of the cold water tank is reduced when dust and other particles adhere to the heat dissipation section of the cooling device of the cold water tank, and that water dispensers are often used in this state. They came up with the idea that if this condition could be improved, the actual cooling efficiency of the cold water tank could be improved.

[0005] That is, the back of the water dispenser's housing usually has a heat dissipation section for the cooling device that cools the cold water tank. The heat dissipation section is often a mesh-like member with serpentine refrigerant pipes through which the refrigerant flows. It is recommended that the heat dissipation section on the back of the water dispenser's housing be cleaned regularly with a vacuum cleaner or cloth, for example, about once a month.

[0006] On the other hand, when a water server is installed in the kitchen or living room of an ordinary home, it is often placed next to a refrigerator or shelf in order to make effective use of the limited living space in the kitchen or living room. In some cases, the water server is placed so that there is a refrigerator or shelf on either side of the water server (i.e., the water server is sandwiched between the refrigerator or shelf on both sides, with only gaps for heat exhaust).

[0007] In this case, when cleaning the heat dissipation section on the back of the water server housing, it is necessary to first move the water server forward so that a vacuum cleaner or similar can reach the heat dissipation section on the back of the water server housing.

[0008] However, the total weight of a water server can exceed 20 kg, due to the weight of the water stored in the cold water tank and other parts inside the server, making it difficult to move. This is especially difficult for women and elderly users.

[0009] As a result, the heat dissipation section on the back of the water server's housing is left uncleaned for long periods of time, and dust and other particles accumulate on the heat dissipation section, reducing the cooling efficiency of the cold water tank.In many cases, the water server is used in this state.

[0010] The problem to be solved by this invention is to increase the actual cooling efficiency of the cold water tank by making it easy to clean the heat radiating section on the back of the housing of the water server. [Means for solving the problem]

[0011] In order to solve the above problems, the present invention provides a water server having the following configuration. [Configuration 1] a housing placed on the floor; a cold water outlet provided on the front surface of the housing; a cold water tank provided inside the housing; a cooling device for cooling the cold water tank; a cold water outlet passage communicating between the cold water tank and the cold water outlet, In a water server in which a heat dissipation part of the cooling device is provided on the back surface of the housing, a bottom plate that faces the floor surface in the vertical direction is provided at the lower end of the housing; This water server is characterized in that the bottom plate is provided with a roller that rolls back and forth on the floor surface, and a roller lock mechanism that can switch between a roller lock state that restricts the rotation of the roller and a roller lock release state that releases the restriction on the rotation of the roller.

[0012] With this configuration, the bottom plate at the bottom of the housing, which is placed on the floor, is provided with rollers that roll back and forth on the floor, allowing the water server housing to be moved back and forth with little force. This allows even female and elderly users to easily move the water server housing forward and clean the heat dissipation section on the back of the housing. After cleaning the back of the water server housing, the water server housing can be moved backward and returned to its original position. Furthermore, a roller lock mechanism is provided that can switch between a roller lock state that restricts roller rotation and a roller unlock state that releases the restriction on roller rotation. Therefore, during normal use of the water server (i.e., when the heat dissipation section on the back of the housing is not being cleaned), the roller lock state that restricts roller rotation can be used to fix the position of the housing.

[0013] [Configuration 2] The water server according to configuration 1, wherein the heat dissipation unit is a mesh-like member in which refrigerant pipes through which a refrigerant flows are arranged in a meandering pattern along the back surface of the housing.

[0014] In this way, the mesh-like member that runs the refrigerant pipes along the back of the housing in a serpentine pattern has a large surface area, making it particularly susceptible to dust and other particles adhering to it, and cleaning it can effectively increase the cooling efficiency.

[0015] [Configuration 3] a plurality of ribs intersecting each other to form a plurality of columnar recesses opening downward are provided on the lower surface of the bottom plate; A skirt wall extending in the left-right direction is provided at the front end of the bottom plate, The water server according to configuration 1 or 2, wherein the roller is accommodated within the columnar recess so that the amount of downward protrusion from the lower edge of the skirt wall is 5 mm or less.

[0016] This prevents the rollers from running over foreign objects and destabilizing the housing when the housing is moved forward. Specifically, if a foreign object is present on the floor in front of the housing when the housing is moved forward, the rollers may run over the object, causing the housing to become unstable. In particular, the housing of a water dispenser has a cold water tank located at a relatively high position, resulting in a high center of gravity and making the housing unstable. To address this issue, a skirt wall extending laterally is provided at the front end of the bottom plate of the housing, and the rollers are housed in a columnar recess so that they protrude downward from the lower edge of the skirt wall by 5 mm or less. This prevents foreign objects on the floor in front of the housing that are more than 5 mm high from being pushed forward by the skirt wall when the housing is moved forward, thereby preventing the rollers from running over the object and destabilizing the housing.

[0017] [Configuration 4] The roller includes a pair of left and right front wheels disposed on a front portion of the bottom plate, The roller lock mechanism has a single operating member located in the center of the bottom plate in the left-right direction, and is configured to be able to switch between a roller lock state in which the pair of left and right front wheels are simultaneously restricted from rotating, and a roller lock release state in which the restriction on the rotation of the pair of left and right front wheels is simultaneously released, by operating the operating member.A water server as described in any of configurations 1 to 3.

[0018] In this way, by operating a single operating member, the rotation of the left front wheel and the right front wheel are restricted simultaneously, thereby preventing a situation in which the rotation of only one of the left and right front wheels is restricted (a situation in which the water server housing may unintentionally turn and move).

[0019] [Configuration 5] a bottle holder for placing a replaceable water bottle on the upper side of the bottom plate, the bottle holder being movable in the front-rear direction between a storage position where the water bottle is stored inside the housing and a pull-out position where the water bottle is pulled out forward from the housing; 5. The water server according to claim 4, wherein the roller lock mechanism is configured so that the operating direction of the operating member for switching between the roller locked state and the roller unlocked state is left and right.

[0020] In this way, the movement direction of the bottle holder (front-to-back) and the operation direction of the operating member of the roller lock mechanism (left-to-right) are perpendicular to each other, so it is possible to prevent the user's hand or other part from accidentally touching the operating member when moving the bottle holder, thereby preventing the locked state of the roller lock mechanism from being unintentionally released.

[0021] [Configuration 6] the roller lock mechanism comprises: a plurality of left front wheel engaging recesses provided at intervals in the circumferential direction on the right side surface of the left front wheel of the pair of left and right front wheels; a plurality of right front wheel engaging recesses provided at intervals in the circumferential direction on the left side surface of the right front wheel; a left front wheel engaging member provided so as to be movable in the left-right direction between a position where it engages with the left front wheel engaging recess and a position where it disengages from the left front wheel engaging recess; a right front wheel engaging member provided so as to be movable in the left-right direction between a position where it engages with the right front wheel engaging recess and a position where it disengages from the right front wheel engaging recess; and a connecting mechanism connecting the left front wheel engaging member and the right front wheel engaging member so that the left front wheel engaging member and the right front wheel engaging member move in opposite left-right directions; A water server as described in configuration 4 or 5, wherein the operating member is connected to one of the left front wheel engaging member and the right front wheel engaging member so as to move integrally in the left-right direction. [Effects of the Invention]

[0022] The water dispenser of this invention has a bottom plate at the bottom of the housing, which is placed on the floor, that is provided with rollers that roll back and forth on the floor. This allows the water dispenser to be moved back and forth with little force. Therefore, even female and elderly users can easily move the water dispenser forward and clean the heat dissipation section at the back of the housing. After cleaning the back of the water dispenser, the water dispenser can be moved backward and returned to its original position. Furthermore, the water dispenser is provided with a roller lock mechanism that can switch between a roller lock state that restricts roller rotation and a roller unlock state that releases the restriction on roller rotation. Therefore, during normal use of the water dispenser (i.e., when the heat dissipation section at the back of the housing is not being cleaned), the roller lock state restricts roller rotation, and the housing can be fixed in place. This makes it easy to clean the heat dissipation section at the back of the water dispenser, thereby improving the actual cooling efficiency of the cold water tank. [Brief explanation of the drawings]

[0023] [Figure 1] FIG. 1 is a plan view of a water server according to an embodiment of the present invention, seen from the front. [Figure 2] A cross-section of the water server in Figure 1, seen from the left side of the server. [Figure 3] Bottom view of the water server in Figure 1 [Figure 4] FIG. 4 is an enlarged view of the front portion of the bottom plate shown in FIG. 3. [Figure 5] A partial cross-sectional view showing the bottom of the water dispenser in Figure 1. [Figure 6] FIG. 6 is a perspective view showing the roller lock mechanism shown in FIGS. 4 and 5 . [Figure 7] FIG. 7 is a perspective view showing the left and right front wheels shown in FIG. 6 with the wheels exposed. [Figure 8] FIG. 5 is a diagram illustrating a state in which the roller lock state is switched to the roller unlock state by moving the operating member shown in FIG. 4 to the right in the left-right direction. [Figure 9]FIG. 6 is an enlarged partial cross-sectional view of the area around the right front wheel shown in FIG. 5. [Figure 10] FIG. 10 is a view showing a state in which the right front wheel engaging member shown in FIG. 9 has moved leftward in the left-right direction to release engagement with the right front wheel engaging recess; DETAILED DESCRIPTION OF THE INVENTION

[0024] Figures 1 and 2 show a water server according to an embodiment of the present invention. This water server has a housing 1 placed on floor F, a cold water outlet 2 and a hot water outlet 3 provided on the front of the housing 1, a cold water tank 4 and a hot water tank 5 (see Figure 2) provided inside the housing 1, a cold water outlet 6 connecting the cold water tank 4 and the cold water outlet 2, and a hot water outlet 7 connecting the hot water tank 5 and the hot water outlet 3.

[0025] 2, the housing 1 has a pair of side plates 8 (see FIG. 1) facing each other laterally, a top plate 9 fixed to the upper ends of the pair of side plates 8, a bottom plate 10 fixed to the lower ends of the pair of side plates 8, a front panel 11 connecting the front ends of the pair of side plates 8, and a back plate 12 connecting the rear ends of the pair of side plates 8. The bottom plate 10 is disposed opposite a floor surface F in the vertical direction.

[0026] Inside the housing 1, a bottle holder 14 for placing a water bottle 13 is provided facing the upper side of the bottom plate 10. The bottle holder 14 is supported by a slide support mechanism 15 provided on the upper surface of the bottom plate 10 so that it can move in the front-to-back direction (left-to-right direction in the figure) between a storage position where the water bottle 13 is stored inside the housing 1 and an extraction position where the water bottle 13 is extracted forward from the housing 1. A front door 16 is provided at the lower front of the housing 1 to open and close the front of the housing 1 so that the water bottle 13 can be taken in and out of the housing 1.

[0027] A pump 17 is installed inside the housing 1 to pump water from the water bottle 13 placed on the bottle holder 14 to the cold water tank 4 and the hot water tank 5. The water bottle 13 and the cold water tank 4 are connected via the pump 17 by a raw water pumping pipe (not shown).

[0028] A cooling device 20 is attached to the cold water tank 4 to cool the drinking water in the cold water tank 4. The drinking water in the cold water tank 4 is kept at a predetermined low temperature (for example, 10°C or below) by the cooling device 20. The cooling device 20 has a compressor 21, a heat radiating section 22, an expansion valve 23, and a cooling pipe 24. The compressor 21, the heat radiating section 22, the expansion valve 23, and the cooling pipe 24 are connected by refrigerant piping 25 so that the refrigerant passes through and circulates in order.

[0029] The compressor 21 draws refrigerant through the cooling pipe 24, compresses it, raises its temperature, and discharges the high-temperature, high-pressure refrigerant toward the heat dissipation unit 22. The heat dissipation unit 22 is provided on the rear surface of the housing 1. The heat dissipation unit 22 is a mesh-like member in which refrigerant pipes through which the refrigerant discharged from the compressor 21 flows are arranged in a serpentine shape along the rear surface of the housing 1. The heat dissipation unit 22 cools and condenses the refrigerant by exchanging heat between the high-temperature refrigerant discharged from the compressor 21 and the outside air. The expansion valve 23 receives the refrigerant that has passed through the heat dissipation unit 22 and reduces its pressure to lower its temperature. The cooling pipe 24 receives the refrigerant that has been reduced in temperature and pressure by the expansion valve 23 and exchanges heat between the refrigerant and the cold water tank 4. The cooling pipe 24 is spirally wound around the outer periphery of the cold water tank 4. The cooling pipe 24 may also be provided by penetrating the wall of the cold water tank 4 so as to pass through the interior of the cold water tank 4.

[0030] A heating device 26 is attached to the hot water tank 5 to heat the drinking water in the hot water tank 5. The drinking water in the hot water tank 5 is kept at a predetermined high temperature (for example, 80° C. or higher) by the heating device 26.

[0031] The cold water outlet 2 and the cold water tank 4 are connected via a cold water outlet passage 6, and by opening a cold water valve 27 provided in the cold water outlet passage 6, low-temperature drinking water in the cold water tank 4 is dispensed from the cold water outlet 2 through the cold water outlet passage 6. Similarly, the hot water outlet 3 (see Figure 1) and the hot water tank 5 are connected via a hot water outlet passage 7, and by opening a hot water valve 28 (see Figure 1) provided in the hot water outlet passage 7, high-temperature drinking water in the hot water tank 5 is dispensed from the hot water outlet 3 through the hot water outlet passage 7.

[0032] As shown in Fig. 3, the bottom plate 10 has a substantially rectangular outline. A plurality of ribs 31 are provided on the underside of the bottom plate 10, intersecting each other so as to form a plurality of columnar recesses 30 that open downward. The plurality of ribs 31 are formed in the shape of plates perpendicular to the left-right direction and are composed of a plurality of vertical ribs 31a extending in the front-rear direction (the up-down direction in the figure), and a plurality of horizontal ribs 31b formed in the shape of plates perpendicular to the vertical ribs and extending in the left-right direction.

[0033] A skirt wall 32 extending in the left-right direction is provided at the front end of the bottom plate 10. The skirt wall 32 is part of a peripheral wall provided around the entire outer periphery of the bottom plate 10. The skirt wall 32 is formed so that its lower edge is at the same height as or lower than the lower ends of the ribs 31. The bottom plate 10 including the skirt wall 32 and the ribs 31 is integrally formed by injection molding of resin.

[0034] The bottom plate 10 has rollers 33 that roll in the front-to-rear direction on the floor surface F (see FIG. 2). The rollers 33 have a pair of left and right front wheels 33a, 33b arranged in the front portion of the bottom plate 10 and a pair of left and right rear wheels 33c, 33d arranged in the rear portion of the bottom plate 10. The bottom plate 10 is also provided with a roller lock mechanism 34 that can switch between a roller lock state that restricts the rotation of the rollers 33 (here, the pair of left and right front wheels 33a, 33b) and a roller lock release state that releases the restriction on the rotation of the rollers 33 (front wheels 33a, 33b). The pair of left and right front wheels 33a, 33b and the pair of left and right rear wheels 33c, 33d are each housed in the columnar recess 30 so that their downward protrusion from the lower edge of the skirt wall 32 is 5 mm or less.

[0035] As shown in Figures 4 to 7, the roller lock mechanism 34 has a plurality of left-side front wheel engagement recesses 37a (see Figure 7) provided at intervals in the circumferential direction on the right side of the left front wheel 33a, a left-side front wheel engagement member 38a provided so as to be movable in the left-right direction between a position where it engages with the left-side front wheel engagement recess 37a and a position where it disengages from the left-side front wheel engagement recess 37a, a plurality of right-side front wheel engagement recesses 37b (see Figure 5) provided at intervals in the circumferential direction on the left side of the right front wheel 33b, a right-side front wheel engagement member 38b provided so as to be movable in the left-right direction between a position where it engages with the right-side front wheel engagement recess 37b and a position where it disengages from the right-side front wheel engagement recess 37b, and a connecting mechanism 39 connecting the left-side front wheel engagement member 38a and the right-side front wheel engagement member 38b so that the left-side front wheel engagement member 38a and the right-side front wheel engagement member 38b move in opposite left-right directions.

[0036] The roller lock mechanism 34 also has a single operating member 40 located in the center of the bottom plate 10 in the left-right direction. The operating member 40 is connected to the left front wheel engaging member 38a so as to move together with the left front wheel engaging member 38a in the left-right direction. The roller lock mechanism 34 is configured to be switchable between a roller locked state (the state shown in FIGS. 4, 5, and 9) in which the rotation of the pair of left and right front wheels 33a, 33b is simultaneously restricted, and a roller unlocked state (the state shown in FIGS. 8 and 10) in which the restriction on the rotation of the pair of left and right front wheels 33a, 33b is simultaneously released, by operating the operating member 40 in the left-right direction. Here, the operating direction of the operating member 40 for switching between the roller locked state and the roller unlocked state is the left-right direction.

[0037] 9 and 10, the right front wheel 33b has a resin roller body 41 and a roller outer periphery 42 attached to the outer periphery of the roller body 41. The roller outer periphery 42 is made of rubber to prevent slipping on the floor surface F. The right front wheel engagement recess 37b is formed in the roller body 41. The left front wheel 33a and the pair of left and right rear wheels 33c, 33d are formed in the same manner as the right front wheel 33b.

[0038] Incidentally, when a water server is installed in the kitchen or living room of an average household, it is often placed next to a refrigerator or shelf in order to make effective use of the limited living space in the kitchen or living room. In some cases, the water server is placed so that there is a refrigerator or shelf on either side of the water server (i.e., the water server is sandwiched between the refrigerator or shelf on both sides, with only gaps for heat exhaust).

[0039] In this case, when cleaning the heat dissipation section 22 on the back of the water server housing 1, it is necessary to first move the water server forward so that a vacuum cleaner or the like can reach the heat dissipation section 22 on the back of the water server housing 1.

[0040] However, the total weight of the water server housing 1 can exceed 20 kg, due to the weight of not only its own weight but also the weight of the water stored in the cold water tank 4 and other parts inside the housing 1, making it difficult to move the water server housing 1. In particular, it is difficult for the water server user, such as a woman or an elderly person, to move the water server housing 1.

[0041] As a result, the heat dissipation section 22 on the back of the housing 1 of the water server is left uncleaned for a long period of time, and dust and other particles accumulate on the heat dissipation section 22, reducing the cooling efficiency of the cold water tank 4, and the water server is often used in this state.

[0042] To address this issue, as shown in FIG. 2, the water server of this embodiment has rollers 33 that roll back and forth on the floor F on the bottom plate 10 at the lower end of the housing 1 that rests on the floor F, allowing the housing 1 to be moved back and forth with little force. This allows even female and elderly users to easily move the housing 1 forward and clean the heat dissipation section 22 on the back of the housing 1. After cleaning the back of the housing 1, the water server can be moved backward and returned to its original position. Because the heat dissipation section 22 on the back of the housing 1 can be easily cleaned, the water server can increase the actual cooling efficiency of the cold water tank 4.

[0043] In particular, as shown in Figure 2, this water server uses a mesh-like component in the heat dissipation section 22, with refrigerant pipes arranged in a serpentine pattern along the back of the housing 1. Heat dissipation section 22 configured in this way has a large surface area and is therefore particularly susceptible to the accumulation of dust and other particles, but cleaning heat dissipation section 22 makes it possible to effectively increase the cooling efficiency.

[0044] In addition, as shown in Figures 9 and 10, this water server is provided with a roller lock mechanism 34 (see Figures 6 and 7) that can switch between a roller lock state (the state shown in Figure 9) that restricts the rotation of roller 33 and a roller unlock state (the state shown in Figure 10) that releases the restriction on the rotation of roller 33.Therefore, when the water server is in normal use (i.e., when the heat dissipation section 22 on the back of the housing 1 is not being cleaned), it can be set to the roller lock state that restricts the rotation of roller 33 as shown in Figure 9, and the position of the housing 1 shown in Figure 2 can be fixed.

[0045] Furthermore, this water server can prevent rollers 33 from running over a foreign object and causing the housing 1 to become unstable when housing 1 shown in Figure 2 is moved forward. That is, if a foreign object is present on floor F in front of housing 1 when housing 1 is moved forward, rollers 33 may run over the object and cause the housing 1 to become unstable. In particular, housing 1 of a water server has cold water tank 4 housed at a relatively high position, which means the center of gravity is high and the housing is prone to becoming unstable. To address this problem, as shown in Figure 3, this water server has a skirt wall 32 extending in the left-right direction at the front end of the bottom plate 10 of the housing 1, and the rollers 33 are housed in columnar recesses 30 so that the amount by which the rollers 33 protrude downward from the lower edge of the skirt wall 32 is 5 mm or less.Therefore, when the housing 1 shown in Figure 2 is moved forward, foreign objects that are more than 5 mm high and are located on the floor surface F in front of the housing 1 can be pushed forward by the skirt wall 32 (or the skirt wall 32 can stop the movement of the housing 1 by hitting the foreign object), preventing the rollers 33 from riding up onto the foreign object and causing the housing 1 to become unstable.

[0046] Furthermore, as shown in Figure 5, this water server simultaneously restricts the rotation of the left front wheel 33a and the right front wheel 33b by operating a single operating member 40, making it possible to prevent a situation in which the rotation of only one of the left front wheel 33a and the right front wheel 33b is restricted (a situation in which the water server housing 1 may unintentionally turn).

[0047] Furthermore, in this water server, the movement direction (front-to-back) of the bottle holder 14 shown in Figure 5 and the operation direction (left-to-right) of the operating member 40 of the roller lock mechanism 34 are perpendicular to each other, so when a user moves the bottle holder 14 shown in Figure 2 in the front-to-back direction, the user's hand or other parts of the body can be prevented from accidentally touching the operating member 40 and unintentionally releasing the locked state of the roller lock mechanism 34.

[0048] 1 chassis 2 Cold water spout 4. Cold water tank 6 Cold water outlet 10 Bottom plate 13. Water bottle 14 Bottle holder 20 Cooling device 22 Heat radiation part 30 Pillar recess 31 Ribs 32 Skirt Wall 33 Laura 33a Left front wheel 33b Right front wheel 34 Roller lock mechanism 37a Left front wheel engagement recess 37b Right front wheel engagement recess 38a Left front wheel engagement member 38b Right front wheel engagement member 39 Connection mechanism 40 Operating member F Floor

Claims

1. A housing (1) placed on a floor surface (F), a cold water outlet (2) provided on the front surface of the housing (1); A cold water tank (4) provided inside the housing (1); a cooling device (20) for cooling the cold water tank (4); a cold water outlet passage (6) communicating between the cold water tank (4) and the cold water outlet (2); In the water server, a heat dissipation section (22) of the cooling device (20) is provided on the back surface of the housing (1), A bottom plate (10) is provided at the lower end of the housing (1) so as to face the floor surface (F) in the vertical direction. The bottom plate (10) is provided with rollers (33) that roll in the front-rear direction on the floor surface (F), and a roller lock mechanism (34) that can switch between a roller lock state that restricts the rotation of the rollers (33) and a roller lock release state that releases the restriction on the rotation of the rollers (33), The roller (33) includes a pair of left and right front wheels (33a, 33b) arranged on the front portion of the bottom plate (10), The roller lock mechanism (34) has a single operating member (40) disposed at the center of the bottom plate (10) in the left-right direction, and is configured to be switchable between the roller lock state in which the pair of left and right front wheels (33 a, 33 b) are simultaneously restricted from rotating and the roller lock release state in which the restriction on the rotation of the pair of left and right front wheels (33 a, 33 b) is simultaneously released by operating the operating member (40); The roller lock mechanism (34) is provided with a plurality of left front wheel engaging recesses (37a) spaced apart in the circumferential direction on the right side surface of the left front wheel (33a) of the pair of left and right front wheels (33a, 33b), and a plurality of right front wheel engaging recesses (37b) spaced apart in the circumferential direction on the left side surface of the right front wheel (33b), and is provided so as to be movable in the left-right direction between a position where it engages with the left front wheel engaging recesses (37a) and a position where it disengages from the left front wheel engaging recesses (37a). a left-side front wheel engaging member (38a); a right-side front wheel engaging member (38b) provided so as to be movable in the left-right direction between a position where it engages with the right-side front wheel engaging recess (37b) and a position where it disengages from the right-side front wheel engaging recess (37b); and a connecting mechanism (39) connecting the left-side front wheel engaging member (38a) and the right-side front wheel engaging member (38b) so that the left-side front wheel engaging member (38a) and the right-side front wheel engaging member (38b) move in opposite directions in the left-right direction; The water server is characterized in that the operating member (40) is connected to one of the left front wheel engaging member (38a) and the right front wheel engaging member (38b) so as to move integrally in the left-right direction.

2. 2. The water server according to claim 1, wherein the heat dissipation section (22) is a mesh-like member in which refrigerant pipes through which a refrigerant flows are arranged in a meandering pattern along the back surface of the housing (1).

3. A plurality of ribs (31) are provided on the lower surface of the bottom plate (10) so as to intersect with each other to form a plurality of columnar recesses (30) that open downward, A skirt wall (32) extending in the left-right direction is provided at the front end of the bottom plate (10), The water server according to claim 1 or 2, wherein the roller (33) is accommodated within the columnar recess (30) so that its downward protrusion from the lower edge of the skirt wall (32) is 5 mm or less.

4. A bottle holder (14) on which a replaceable water bottle (13) is placed is provided on the upper side of the bottom plate (10) so as to be movable in the front-rear direction between a storage position where the water bottle (13) is stored inside the housing (1) and a pull-out position where the water bottle (13) is pulled out forward from the housing (1); The water server according to claim 1 or 2, wherein the roller lock mechanism (34) is configured so that the operating direction of the operating member (40) for switching between the roller locked state and the roller unlocked state is left and right.

5. A bottle holder (14) on which a replaceable water bottle (13) is placed is provided on the upper side of the bottom plate (10) so as to be movable in the front-rear direction between a storage position where the water bottle (13) is stored inside the housing (1) and a pull-out position where the water bottle (13) is pulled out forward from the housing (1); The water server according to claim 3, wherein the roller lock mechanism (34) is configured so that the operating direction of the operating member (40) for switching between the roller locked state and the roller unlocked state is left and right.

Images