Refrigeration house indoor unit, chassis unit of refrigeration house indoor unit and refrigeration house system

Abstract

The utility model provides a refrigeration house indoor unit and a chassis unit and a refrigeration house system thereof, the chassis unit comprises a chassis and a heating module, the chassis is provided with a containing concave position and a water outlet, the bottom of the containing concave position protrudes towards the top of the containing concave position to form a step part, the step part divides the containing concave position into a water collecting area and a water avoiding area which are isolated from each other, and the heating module is arranged in the water collecting area. The heating module comprises an auxiliary heating assembly and a heating pipe, the auxiliary heating assembly is installed in the water collecting area and comprises an auxiliary heating frame and a clamping piece, the auxiliary heating frame is provided with a clamping position and a water passing opening in the bottom of the clamping position, the water passing opening penetrates through the auxiliary heating frame in the height direction of the base plate, and the clamping piece is installed at the bottom of the auxiliary heating frame. A clamping position is formed between the clamping piece and the auxiliary heating frame, the heating section of the heating pipe is arranged in the clamping position, and the heating section is adjacent to the auxiliary heating frame. The refrigeration house inner machine is provided with the chassis unit, the refrigeration house system is provided with the refrigeration house inner machine, and the chassis unit has the advantages of being low in energy consumption, avoiding repeated freezing of condensate water and being better in structural design.

Description

Technical Field

[0001] The utility model relates to the technical field of cold storage, in particular to a chassis unit, a cold storage internal machine provided with the chassis unit, and a cold storage system provided with the cold storage internal machine. Background Art

[0002] The cold storage system is used to store items with specific temperature and humidity storage requirements. Compared with traditional cold storage systems, the cold storage system has a larger cooling capacity and larger storage space, so it is widely used in food, chemical, material transfer, scientific experiments and other fields. The existing cold storage systems are mainly of the following two types:

[0003] The first method is to install a cold radiator in the warehouse, and exchange heat with the air in the warehouse through the cold radiator to achieve refrigeration of the warehouse. However, the disadvantage of this type of cold storage system is that after a period of use, a large amount of frost will appear on the cold radiator, which will affect the refrigeration efficiency of the cold storage system; and it is difficult to defrost the cold radiator. When defrosting, the entire cold storage system needs to be powered off to allow the cold radiator to defrost at natural temperature or to be defrosted by pouring hot water on the cold radiator.

[0004] The second type is that the cold storage system includes a warehouse, a cold storage internal machine and a cold storage external machine. The cold storage internal machine is located in the warehouse, and the cold storage external machine is located outside the warehouse and connected to the cold storage internal machine. The cold storage internal machine includes a chassis, a heat exchanger and a fan. The chassis has a box body and a chassis unit, and the chassis unit has a heating module; the heat exchanger and the fan are both located in the chassis, and the fan is located between the air outlet of the chassis and the heat exchanger. The fan is used to blow air into the warehouse to blow the cold air formed by the heat exchange of the heat exchanger into the warehouse; when the heat exchanger of the cold storage internal machine needs to be defrosted, the cold storage system is briefly switched to the heating mode to melt the heated frost blocks on the heat exchanger. This type of cold storage system better solves the problems of difficult defrosting, complex defrosting and long defrosting time of the traditional cold row cold storage system, so it is gradually replacing the traditional cold row cold storage system.

[0005] However, the existing cold storage machines still have shortcomings, specifically: Figure 1As shown, the chassis unit 9 of the existing cold storage machine includes a water collecting chassis 91 and a heating module 92. The chassis 91 is used to receive the condensed water dripping from the heat exchanger and the condensed water formed by defrosting. The heating module 92 is used to heat the condensed water in the chassis 91 to prevent the condensed water in the chassis 91 from freezing quickly due to the low temperature in the warehouse, thereby preventing the condensed water in the chassis 91 from being unable to be discharged in time, thereby affecting the normal operation of the cold storage machine. However, due to the unreasonable structural design of the existing chassis 91, the space of the chassis 91 for receiving condensed water is too large, resulting in a large area of ​​the heating module 92 that needs to be arranged on the chassis 91, which increases the production cost and energy consumption, and the heating speed is slow, which makes the condensed water easy to freeze repeatedly; in addition, since the bottom of the bracket for installing the fan and related connecting parts (such as bolts) will be soaked in condensed water for a long time, it is easy to accelerate the structural strength decay rate of the soaked part of the bracket and related connecting parts, and at the same time, it will also accelerate the aging and corrosion rate of the bracket and related connecting parts, reducing the safety of the cold storage machine, shortening the service life of the cold storage machine, and increasing the maintenance cost and difficulty of the cold storage machine. Summary of the invention

[0006] In order to solve the above problems, the main purpose of the utility model is to provide a chassis unit with low energy consumption, which can avoid repeated freezing of condensed water and has a better structural design.

[0007] Another object of the utility model is to provide a cold storage internal machine provided with the above chassis unit.

[0008] Another object of the present utility model is to provide a cold storage system equipped with the cold storage internal machine.

[0009] In order to achieve the main purpose of the utility model, the utility model provides a chassis unit, including a chassis and a heating module, the chassis has a accommodating recess and a drain outlet, wherein the bottom of the accommodating recess protrudes toward the top of the accommodating recess to form a step portion, the step portion divides the accommodating recess into a water collection area and a water avoidance area isolated from each other, the drain outlet is arranged in the water collection area and is connected with the water collection area, the heating module includes an auxiliary heating component and a heating pipe, the auxiliary heating component is installed in the water collection area, the auxiliary heating component includes an auxiliary heating frame and a clamp, the auxiliary heating frame has a clamping position, and the bottom water outlet of the clamping position passes through the auxiliary heating frame in the height direction of the chassis, the clamp is installed at the bottom of the auxiliary heating frame, a clamping position is formed between the clamp and the auxiliary heating frame, the heating section of the heating pipe is arranged in the clamping position, and the heating section is adjacent to the auxiliary heating frame.

[0010] As can be seen from the above, the accommodating recess is separated into a water collection area and a water avoidance area by a step portion formed at its bottom, so that on the basis of meeting the requirements of condensed water collection and discharge, the space size of the water collection area can be reasonably reduced, thereby reducing the range of heating pipes required for layout, which not only reduces production costs, but also can better avoid repeated freezing of condensed water in the water collection area and reduce energy consumption; in addition, the provision of the auxiliary heating component can increase the heating area of ​​the heating module, thereby expanding the heating range of the heating module, so as to improve the heating efficiency of the heating module, and further avoid repeated freezing of condensed water in the water collection area, which is conducive to the timely discharge of condensed water in the water collection area.

[0011] A preferred solution is that the clip is in a rectangular wave shape, the clip has an inserting portion, the auxiliary heating frame has a first slot, and the inserting portion is inserted into the first slot.

[0012] As can be seen from the above, the structural design of the clip can prevent the clip and / or the auxiliary heating frame from crushing the heating tube, while the design of the plug-in portion on the clip and the first slot on the auxiliary heating frame can prevent the installed clip from moving relative to the auxiliary heating frame, thereby improving the firmness and reliability of the connection between the clip and the auxiliary heating frame.

[0013] A further solution is that the auxiliary heating assembly also includes a locking connector, which is detachably connected to the auxiliary heating frame and the clip respectively.

[0014] As can be seen from the above, this design makes the maintenance, repair and replacement of the heating module more convenient.

[0015] Another preferred solution is that the bottom surface of the water collection area has a slope, and the drain outlet is located at the lowest point of the bottom surface; the bottom surface is flat, the plane is inclined in the height direction, or the bottom surface is concave and bent in a "∨" shape, or the bottom surface is convex and bent in a "∧" shape, and drain outlets are provided at the lowest points on both sides of the "∧"-shaped bottom surface.

[0016] It can be seen from the above that this design is more conducive to the discharge of condensed water in the catchment area.

[0017] A further solution is that the chassis unit further comprises a drainage joint, which is sealed and installed in the drainage port and communicated with the water collection area.

[0018] As can be seen from the above, the setting of the drain joint is conducive to the connection between the chassis unit and the drain pipe, and better prevents the leakage of condensed water, while also making the processing of the chassis more convenient.

[0019] A further solution is that the chassis comprises a bottom plate, a first side plate, a second side plate, a third side plate, a fourth side plate, a fifth side plate and a sixth side plate; in the width direction of the chassis, the first side plate is bent and formed at the first side of the bottom plate, and the second side plate is bent and formed at the second side of the bottom plate; in the length direction of the chassis, the third side plate and the fourth side plate are bent and formed at the first end of the bottom plate, and the fifth side plate and the sixth side plate are bent and formed at the second end of the bottom plate; the first side plate is welded to the third side plate and the fifth side plate respectively, and the bottom plate is welded to the third side plate and the fifth side plate respectively, the bottom plate, the first side plate, the third side plate and the fifth side plate form a water collection area, and the bottom plate, the second side plate, the fourth side plate and the sixth side plate form a water avoidance area.

[0020] As can be seen from the above, this design makes the processing of the chassis more convenient.

[0021] A further solution is that the chassis further comprises a bent wing plate, which is bent and formed at the end of the bottom plate in the length direction and is located on the step portion.

[0022] As can be seen from the above, the bent wing plate can be used to cooperate with the mounting plate provided with a connecting head of the machine in the cold storage, so as to facilitate the repair and maintenance of the machine in the cold storage.

[0023] A further solution is that a second slot and a first connecting hole group are provided on the base plate, the second slot is located at the top of the step portion, the second slot penetrates the base plate in the height direction, the first connecting hole group penetrates the base plate, and the first connecting hole group is located in the water avoidance area and on the step portion.

[0024] It can be seen from the above that this design not only ensures that the bracket of the machine in the cold storage can be firmly and reliably connected to the chassis, but also prevents the bracket and related connecting parts from being soaked by condensed water, slows down the structural strength attenuation and aging rate of the bracket and related connecting parts, and avoids the bracket and related connecting parts from being corroded by condensed water.

[0025] In order to achieve another purpose of the utility model, the utility model provides a cold storage internal machine, including a box body, a heat exchanger, a bracket and a fan, the box body is provided with an air outlet, the fan is installed on the bracket and is located at the air outlet, the fan is located between the heat exchanger and the air outlet, wherein the cold storage internal machine also includes the above-mentioned chassis unit; the box body is mounted on the chassis and forms an accommodating cavity with the chassis, the heat exchanger, the bracket and the fan are all arranged in the accommodating cavity, a part of the heat exchanger is installed in the clamping position, and the bracket is installed on the step portion on the chassis.

[0026] As can be seen from the above, the cold storage equipped with the above chassis unit can better prevent the condensed water from freezing repeatedly, and has lower energy consumption, longer service life, and more convenient repair and maintenance.

[0027] In order to achieve another purpose of the utility model, the utility model provides a cold storage system, including a cold storage and an external cold storage unit, the external cold storage unit is arranged outside the cold storage, wherein the cold storage system also includes an internal cold storage unit, the internal cold storage unit is arranged in the cold storage and connected to the external cold storage unit.

[0028] As can be seen from the above, the cold storage system equipped with the above cold storage internal machine has more convenient defrosting, lower energy consumption, longer service life, and lower maintenance cost and repair difficulty. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a structural diagram of the chassis unit of the existing cold storage internal machine.

[0030] Figure 2 It is an exploded view of an embodiment of a cold storage internal machine of the utility model.

[0031] Figure 3 It is a structural diagram of the chassis of the cold storage internal machine embodiment of the utility model from the first perspective.

[0032] Figure 4 It is a structural diagram of the chassis of the cold storage internal machine embodiment of the utility model from a second viewing angle.

[0033] Figure 5 It is an exploded view of an embodiment of a cold storage internal machine of the utility model with some components omitted.

[0034] Figure 6 It is a structural diagram of the cold storage internal machine embodiment of the utility model from the first perspective after omitting some components.

[0035] Figure 7 It is a structural diagram of the cold storage internal machine embodiment of the utility model from a second viewing angle after omitting some components.

[0036] Figure 8 yes Figure 2 Enlarged view of point A in the middle.

[0037] The present invention will be further described below with reference to the accompanying drawings and embodiments. DETAILED DESCRIPTION

[0038] Cold storage internal machine embodiment

[0039] Reference Figure 2 The cold storage internal machine 100 includes a chassis unit 101, a box body 102, a heat exchanger 3, a bracket 104, a fan 105 and a valve 106. The chassis unit 101 includes a chassis 1 and a heating module 2.

[0040] Combination Figures 3 to 5The bottom plate 1 has a receiving recess 110, and the bottom of the receiving recess 110 protrudes toward the top of the receiving recess 110 to form a step 111, so that the step 111 separates the receiving recess 110 into a water collection area 1101 and a water avoidance area 1102, and the water collection area 1101 and the water avoidance area 1102 are isolated from each other. The receiving recess 110 separates itself into a water collection area 1101 and a water avoidance area 1102 through the step 111 formed at the bottom of itself, so that on the basis of meeting the requirements of condensed water collection and drainage, the space size of the water collection area 1101 is reasonably reduced, thereby reducing the range required for the heating module 2 to be arranged, which not only reduces the production cost, but also can better avoid repeated freezing of condensed water in the water collection area 1101 and reduce energy consumption.

[0041] Preferably, the chassis 1 comprises a bottom plate 11, a first side plate 12, a second side plate 13, a third side plate 14, a fourth side plate 15, a fifth side plate 16 and a sixth side plate 17. The bottom plate 11 is bent to form the above-mentioned step portion 111; the first side plate 12 and the second side plate 13 extend along the length direction of the chassis 1, and in the width direction of the chassis 1, the first side plate 12 is bent to form a first side of the bottom plate 11, and the second side plate 13 is bent to form a second side of the bottom plate 11. The third side panel 14, the fourth side panel 15, the fifth side panel 16 and the sixth side panel 17 all extend along the width direction of the chassis 1; wherein, in the length direction of the chassis 1, the third side panel 14 and the fourth side panel 15 are bent and formed at the first end of the bottom panel 11, and the third side panel 14 and the fourth side panel 15 are distributed along the width direction of the chassis 1, and the fifth side panel 16 and the sixth side panel 17 are bent and formed at the second end of the bottom panel 11, and the fifth side panel 16 and the sixth side panel 17 are distributed along the width direction of the chassis 1.

[0042] In addition, the first side plate 12 is welded to the third side plate 14 and the fifth side plate 16 respectively, and the bottom plate 11 is welded to the third side plate 14 and the fifth side plate 16 respectively, so as to weld and seal the gaps between the bottom plate 11, the first side plate 12, the third side plate 14 and the fifth side plate 16, so that the bottom plate 11, the first side plate 12, the third side plate 14 and the fifth side plate 16 enclose the above-mentioned water collection area 1101, and prevent the condensed water collected in the water collection area 1101 from leaking; the bottom plate 11, the second side plate 13, the fourth side plate 15 and the sixth side plate 17 enclose the water avoidance area 1102. The chassis 1 is formed by the bending process, so that the processing of the chassis 1 is more convenient.

[0043] The chassis 1 also has a drain port 114, which is disposed in the water collection area 1101 and is in communication with the water collection area 1101, so that the condensed water in the water collection area 1101 can be discharged from the chassis 1 through the drain port 114. Preferably, the bottom surface of the water collection area 1101 is arranged to have a slope, and the drain port 114 is located at the lowest point of the chassis 1. This design makes it unnecessary to install the cold storage internal machine 100 at an angle when installing the cold storage internal machine 100. The bottom surface of the water collection area 1101 may be a plane, and the plane is inclined to the height direction of the chassis 1; as another optional solution, in another embodiment, the bottom surface of the water collection area 1101 may also be concave and bent in a "∨" shape, and the drain port 114 is provided at the sharp corner of the "∨"-shaped bottom surface (i.e., the lowest depression of the bottom surface); as another optional solution, in another embodiment, the bottom surface of the water collection area 1101 may also be convex and bent in a "∧" shape, and the drain ports 114 are respectively provided at the lowest points on both sides of the "∧"-shaped bottom surface. It can be seen that the above design is more conducive to the discharge of condensed water in the water collection area 1101.

[0044] Furthermore, if Figure 6 As shown, the chassis unit 101 also includes a drain joint 115, which is sealed and installed in the drain port 114, and the drain joint 115 is connected to the water collection area 1101; the setting of the drain joint 115 is conducive to the connection between the chassis unit 101 and the external drain pipe, and better prevents the leakage of condensed water to prevent water accumulation and freezing in the warehouse, and also makes the processing of the chassis 1 more convenient.

[0045] The heating module 2 includes an auxiliary heating component 21 and a heating pipe 22. The auxiliary heating component 21 is installed in the water collection area 1101; preferably, the auxiliary heating component 21 includes an auxiliary heating frame 211 and a clip 212. The auxiliary heating frame 211 is fixedly connected to the chassis 1. The auxiliary heating frame 211 has a clamping position. A part of the heat exchanger 3 is installed in the clamping position, so that the heat exchanger 3 is also placed in the water collection area 1101, so that the condensed water generated by the heat exchanger 3 can be recovered into the water collection area 1101 after dripping. Among them, the bottom of the clamping position is preferably provided with a water outlet 2112, and the water outlet 2112 passes through the auxiliary heating frame 211 in the height direction of the chassis 1, so that the condensed water dripping from the heat exchanger 3 can better pass through the auxiliary heating frame 211 and flow to the drain 114, so as to avoid the accumulation of condensed water on the auxiliary heating frame 211.

[0046] The clip 212 is installed at the bottom of the auxiliary heating frame 211, and a clamping position is formed between the clip 212 and the auxiliary heating frame 211. The heating section 221 of the heating tube 22 is arranged in the water collection area 1101, and the heating section 221 is arranged in the clamping position, so that the auxiliary heating frame 211 and the clip 212 cooperate to clamp and fix the heating tube 22; in addition, the heating tube 22 is also adjacent to the auxiliary heating frame 211. The setting of the auxiliary heating component 21 can increase the heating area of ​​the heating module 2, thereby expanding the heating range of the heating module 2, so as to improve the heating efficiency of the heating module 2, and further avoid repeated freezing of condensed water in the water collection area 1101, which is conducive to the timely discharge of condensed water in the water collection area 1101.

[0047] Preferably, the clip 212 is in a rectangular wave shape, and the clip 212 has a plug-in portion 2121, and the auxiliary heating frame 211 has a first slot 2111; when the auxiliary heating frame 211 and the clip 212 are assembled, the plug-in portion 2121 is inserted into the first slot 2111. Through the structural design of the clip 212, when the clip 212 cooperates with the auxiliary heating frame 211 to fix the heating tube 22, it is possible to prevent the clip 212 and / or the heating tube 22 from crushing the heating tube 22; and the design of the plug-in portion 2121 on the clip 212 and the first slot 2111 on the auxiliary heating frame 211 can prevent the clip 212 from moving relative to the auxiliary heating frame 211 after installation, thereby improving the firmness and reliability of the connection between the clip 212 and the auxiliary heating frame 211.

[0048] Furthermore, the auxiliary heating assembly 21 further includes a locking connector, which is detachably connected to the auxiliary heating frame 211 and the clip 212; for example, the locking connector can be a bolt; this design makes the maintenance, repair, and replacement of the heating module 2 more convenient. Of course, as other optional solutions, in other embodiments, the setting of the locking connector can also be cancelled, and the clip 212 and the auxiliary heating frame 211 can be fixed by welding.

[0049] Combination Figure 7 and Figure 8 The box body 102 is sleeved on the chassis 1, and a receiving cavity is formed between the box body 102 and the chassis 1; wherein, an air outlet 1021 is provided on the front side of the box body 102 (i.e., the side of the box body 102 away from the heat exchanger 3). Preferably, the box body 102 adopts a split structure design, which makes the production of the box body 102 more convenient, and also facilitates the repair and maintenance of the cold storage internal machine 100.

[0050] The heat exchanger 3 , the bracket 104 and the fan 105 are all arranged in the accommodating cavity, and the bracket 104 is installed on the step portion 111 of the chassis 1 . Preferably, a second slot 112 and a first connection hole group 113 are provided on the chassis 1 of the chassis 1, and the second slot 112 is preferably provided at the top of the step portion 111, and the second slot 112 penetrates the bottom plate 11 in the height direction of the chassis 1, the first connection hole group 113 penetrates the bottom plate 11, and the first connection hole group 113 is located in the water-avoiding area 1102 and on the step portion 111; matchingly, an insert 1041 and a second connection hole group 1042 are provided at the bottom of the bracket 104; when the bracket 104 is assembled with the chassis 1, the insert 1041 is inserted into the second slot 112, and the second connection hole group 1042 is opposite to the first connection hole group 113, and then a locking member (such as a bolt) can be passed through the second connection hole group 1042 and then fixedly connected to the first connection hole group 113, or a locking member (such as a bolt and a nut) can be passed through the first connection hole group 113 and the second connection hole group 1042 to fix the chassis 1 and the bracket 104. The design of the insert 1041 and the second slot 112 can position the bracket 104 and the chassis 1 during the assembly process, and can also prevent the bracket 104 from tipping over during the assembly process. The fan 105 is installed on the bracket 104 and located at the air outlet 1021, and the fan 105 is located between the heat exchanger 3 and the air outlet 1021.

[0051] The valve 106 is mounted on the housing 102, and the valve 106 is connected to the pipeline of the heat exchanger 3. Preferably, the chassis 1 further comprises a bending wing plate 18, which is bent and formed at the end of the bottom plate 11 in the length direction of the chassis 1, and the bending wing plate 18 is located on the step portion 111 and is bent toward the bottom of the housing 102; accordingly, the split housing 102 comprises a mounting plate 1022, on which a third slot 10221 is provided, and the valve 106 is mounted on the mounting plate 1022. When the mounting plate 1022 is assembled with the chassis 1, the bending wing plate 18 is inserted into the third slot 10221. By setting the mounting plate 1022 and the bending wing plate 18, during the assembly process of the mounting plate 1022 and the chassis 1, the cooperation of the bending wing plate 18 and the third slot 10221 can quickly position the mounting plate 1022 and the chassis 1; in addition, by making the box body 102 include an independent mounting plate 1022 and installing the valve 106 on the mounting plate 1022, when the box body 102 and the chassis 1 of the cold storage indoor unit 100 are disassembled, there is no need to disassemble the valve 106 and the heat exchanger 3, which makes it easier to repair and maintain the cold storage indoor unit 100.

[0052] In summary, it can be seen that through the design of the chassis unit 101, the cold storage internal machine 100 can better prevent the condensed water from freezing repeatedly, and has lower energy consumption, longer service life, and more convenient repair and maintenance.

[0053] Cold storage system implementation

[0054] The cold storage system includes a cold storage, a cold storage external machine and the cold storage internal machine described in the above cold storage internal machine embodiment. Among them, the cold storage external machine is arranged outside the cold storage, the cold storage internal machine is arranged inside the cold storage, and the cold storage internal machine is connected with the cold storage external machine to establish a refrigeration circuit of the cold storage system. By setting the above cold storage internal machine, the cold storage system makes the defrosting process of the cold storage system more convenient, the energy consumption is lower, the service life is longer, and the maintenance cost and repair difficulty are lower.

[0055] Finally, it should be emphasized that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various changes and modifications. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A chassis unit, comprising a chassis and a heating module, wherein the chassis has a receiving recess and a drain port, and is characterized in that: The bottom of the accommodating recess protrudes toward the top of the accommodating recess to form a step portion, the step portion divides the accommodating recess into a water collection area and a water avoidance area that are isolated from each other, and the drain port is arranged in the water collection area and communicates with the water collection area; The heating module includes an auxiliary heating component and a heating pipe, the auxiliary heating component is installed in the water collection area, the auxiliary heating component includes an auxiliary heating frame and a clamp, the auxiliary heating frame has a clamping position, the bottom water outlet of the clamping position, the water outlet passes through the auxiliary heating frame in the height direction of the chassis, the clamp is installed at the bottom of the auxiliary heating frame, a clamping position is formed between the clamp and the auxiliary heating frame, the heating section of the heating pipe is arranged in the clamping position, and the heating section is adjacent to the auxiliary heating frame.

2. The chassis unit according to claim 1, characterized in that: The clip is in a rectangular wave shape, the clip has an inserting portion, the auxiliary heat frame has a first slot, and the inserting portion is inserted into the first slot.

3. The chassis unit according to claim 2, characterized in that: The auxiliary heating assembly also includes a locking connector, which is detachably connected to the auxiliary heating frame and the clip respectively.

4. The chassis unit according to claim 1, characterized in that: The bottom surface of the water collection area has a slope, and the drainage outlet is located at the lowest point of the bottom surface; The bottom surface is a plane, and the plane is inclined to the height direction, or The bottom surface is concave and bent in a "∨" shape, or The bottom surface is convexly bent in a "∧" shape, and the drainage outlets are respectively arranged at the lowest points on both sides of the "∧"-shaped bottom surface.

5. The chassis unit according to claim 1, characterized in that: The chassis unit further comprises a drainage joint which is sealingly mounted in the drainage port and communicates with the water collection area.

6. The chassis unit according to any one of claims 1 to 5, characterized in that: The chassis comprises a bottom plate, a first side plate, a second side plate, a third side plate, a fourth side plate, a fifth side plate and a sixth side plate; In the width direction of the chassis, the first side plate is bent and formed on the first side of the bottom plate, and the second side plate is bent and formed on the second side of the bottom plate; In the length direction of the chassis, the third side plate and the fourth side plate are bent and formed at the first end of the bottom plate, and the fifth side plate and the sixth side plate are bent and formed at the second end of the bottom plate; The first side plate is welded to the third side plate and the fifth side plate respectively, the bottom plate is welded to the third side plate and the fifth side plate respectively, the bottom plate, the first side plate, the third side plate and the fifth side plate form the water collection area, and the bottom plate, the second side plate, the fourth side plate and the sixth side plate form the water avoidance area.

7. The chassis unit according to claim 6, characterized in that: The chassis further comprises a bent wing plate, which is bent and formed at the end of the bottom plate in the length direction and is located on the step portion.

8. The chassis unit according to claim 6, characterized in that: A second slot and a first connection hole group are provided on the bottom plate, the second slot is located at the top of the step portion, the second slot passes through the bottom plate in the height direction, the first connection hole group passes through the bottom plate, and the first connection hole group is located in the water avoidance area and on the step portion.

9. A cold storage internal machine, comprising a box, a heat exchanger, a bracket and a fan, wherein the box is provided with an air outlet, the fan is mounted on the bracket and located at the air outlet, and the fan is located between the heat exchanger and the air outlet, characterized in that: The cold storage internal machine further comprises a chassis unit as claimed in any one of claims 1 to 8; The box body is sleeved on the chassis and forms a containing cavity with the chassis. The heat exchanger, the bracket and the fan are all arranged in the containing cavity. A part of the heat exchanger is installed in the clamping position, and the bracket is installed on the step portion of the chassis.

10. A cold storage system, comprising a cold storage and an external unit of the cold storage, wherein the external unit of the cold storage is arranged outside the cold storage, and is characterized in that: The cold storage system further comprises a cold storage internal unit as claimed in claim 9, wherein the cold storage internal unit is arranged in the cold storage and connected to the cold storage external unit.

Images