CN215873867U

CN215873867U - Fresh-keeping dining car

Info

Publication number: CN215873867U
Application number: CN202121579561.3U
Authority: CN
Inventors: 王森; 林琛
Original assignee: Shenzhen Douchuang Artificial Intelligence Co ltd
Current assignee: Shenzhen Douchuang Artificial Intelligence Co ltd
Priority date: 2021-07-12
Filing date: 2021-07-12
Publication date: 2022-02-22
Anticipated expiration: 2031-07-12

Abstract

The application relates to a fresh-keeping dining car, which comprises a heat preservation area, a cleaning device and a ventilation pipeline. The heat preservation area comprises a heating area and a refrigerating area, the heating area is provided with a first heat pump, and the refrigerating area is provided with a second heat pump; the cleaning device comprises a first water collecting piece arranged in the heating area, a second water collecting piece arranged in the cooling area and a drain hole arranged at the bottom of the vehicle, and the first water collecting piece are respectively communicated with the drain hole; the ventilation pipeline comprises an air inlet arranged on the roof of the vehicle and an air outlet arranged at the bottom of the vehicle, at least two branches are arranged between the air inlet and the air outlet, and the two branches are respectively communicated with the heating area and the refrigerating area. The heating area and the cooling area are used for placing materials with different requirements, the first water collecting piece is arranged in the heating area, the second water collecting piece is arranged in the cooling area, water is discharged out of the vehicle through the water discharging hole, the freshness of the materials and the environmental sanitation in the vehicle are guaranteed, in addition, the ventilation pipeline can ventilate the cooling area and the heating area, the peculiar smell is removed in time, and meanwhile, the freshness keeping performance of the materials is further improved.

Description

Fresh-keeping dining car

Technical Field

The application relates to the field of transport vehicles, in particular to a fresh-keeping dining car.

Background

In a plurality of fields such as manufacturing, storage commodity circulation, often need utilize the turnover device to send the material to the target area, the turnover device generally is the structural style of small-size transport vechicle, can deposit material many times once only to can reach the target area fast. In addition to the industrial field, in the social public field, such as public places with large people flow or material demand, similar transportation means are required to be equipped, such as hospitals, hotels, office buildings, airports and other places, a unified food supply place is usually configured, and dining cars are equipped to send food into various wards, guest rooms or workshops.

Since the inside of the dining car needs to position and protect the materials to ensure the quality of the materials, especially for the transportation of food, medicine, etc., the environmental temperature of the dining car needs to be controlled at a predetermined temperature, and proper ventilation must be performed. A refrigeration area and a heating area or a heat preservation area are often arranged in the conventional dining car, after the dining car is used for a certain time, the heating area can generate steam, the refrigeration area can generate ice, and the refrigerating area and the heating area have peculiar smell and are difficult to clean; in addition, the air circulation between the cooling zone and the heating zone is low in order to maintain the temperature, and the fresh-keeping function is deteriorated in the past.

In view of this, it is necessary to improve the structure of the existing dining car to ensure the stable fresh-keeping performance of the dining car.

Disclosure of Invention

In order to solve the technical problem that the preservation performance of the preservation dining car in the prior art gradually becomes worse along with the increase of the service life, the application provides the preservation dining car.

The utility model discloses a dining car, comprising:

the heat preservation area comprises a heating area and a refrigerating area, the heating area is provided with a first heat pump, and the refrigerating area is provided with a second heat pump;

the cleaning device comprises a first water collecting piece arranged in the heating area, a second water collecting piece arranged in the cooling area and a drain hole arranged at the bottom of the vehicle, and the first water collecting piece are respectively communicated with the drain hole; and the number of the first and second groups,

the ventilation pipeline comprises an air inlet arranged on the roof of the vehicle and an air outlet arranged at the bottom of the vehicle, at least two branches are arranged between the air inlet and the air outlet, and the two branches are respectively communicated with the heating area and the cooling area.

In a preferred embodiment, the heating area and the cooling area are provided with vertical enclosing plates, the bottom of each enclosing plate is provided with a containing groove, each containing groove is matched with the first water collecting piece and the second water collecting piece, each of the first water collecting piece and the second water collecting piece is provided with a water collecting opening, and condensed water is collected into the water collecting openings through the enclosing plates.

Further, in the above embodiment, the water collecting opening is surrounded by the flow guide plate, and the horizontal sectional area of the water collecting opening is gradually reduced from top to bottom.

In a preferred embodiment, the branch comprises a plurality of sections of connecting pipes, the connecting pipes are detachably connected, the connecting pipes are provided with a first port and a second port, and the inner wall of the first port and/or the second port is provided with a filtering piece.

Furthermore, in the above embodiment, the filtering element is a filtering net, the filtering net includes a filtering bracket, the inner wall of the connecting pipe is provided with a clamping groove, and the filtering bracket abuts against the clamping groove.

In a preferred embodiment, the heating zone is provided with a humidifying part, the humidifying part comprises a water tank arranged outside the vehicle and a spray generating part arranged in the heating zone, and a mist outlet of the spray generating part is communicated with the heating zone.

In a preferred embodiment, the fresh food cart further comprises a sterilizing device, and the sterilizing device comprises an ultraviolet lamp arranged in the heat-producing area.

In a preferred embodiment, the air inlet and/or the air outlet is/are provided with at least one air inlet, the air inlet faces to the head of the dining car, and the air outlet faces to the tail of the dining car.

Further, in the above embodiment, the air inlet is provided with an openable and closable air inlet plate, and the air inlet plate is inclined from the vehicle head to the vehicle tail.

In a preferred embodiment, the drain hole is provided with an electric valve, the air inlet is provided with a fan, and the fresh-keeping dining car further comprises a control device which is electrically connected with the first heat pump, the second heat pump, the electric valve and the fan.

Compared with the prior art, the technical scheme provided by the embodiment of the application has the following advantages: set up and make hot district and refrigeration district and place the material that the demand is different, and in order to in time clear up the steam condensate water that the district produced of heating and the water that melts in refrigeration district, it sets up first water-collecting piece to make hot district, it sets up second water-collecting piece to make cold district, and discharge the car with water through the wash port outside, guarantee the fresh-keeping of material and the sanitation in the car, moreover, the ventilation pipe can ventilate refrigeration district and heating district, in time clear away the peculiar smell, further promote the freshness retaining performance to the material simultaneously. Consequently, this use is novel to keep warm, clear up and dispel peculiar smell combination application to reach the fresh-keeping requirement to the material transportation, to the clearance of heat preservation district internal environment, can to a great extent relieve the problem that the interior environment variation of car leads to the freshness retaining performance variation.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the utility model and together with the description, serve to explain the principles of the utility model.

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive exercise.

FIG. 1 is a schematic structural diagram of a fresh-keeping dining car according to an embodiment of the present disclosure;

FIG. 2 is a schematic view of an internal structure of a fresh-keeping dining car according to an embodiment of the present invention;

fig. 3 is a schematic view of an internal structure of a fresh-keeping dining car in a bottom view according to an embodiment of the present invention;

FIG. 4 is a schematic structural diagram of a shroud provided in an embodiment of the present application;

fig. 5 is a schematic structural diagram of a connection tube according to an embodiment of the present application.

Wherein the reference numerals are:

100. a heat preservation area; 110. a hot zone is produced; 120. a refrigeration zone; 130. enclosing plates; 131. a containing groove; 141. a water tank; 142. a spray generating member; 200. a cleaning device; 210. a first water collecting member; 211. a water collection port; 2111. a baffle; 220. a second water collecting member; 230. a drain hole; 300. a ventilation line; 310. an air inlet; 320. an air outlet; 330. a branch circuit; 331. a connecting pipe; 3311. a first port; 3312. a second port; 340. a filter member; 350. an inner air outlet; 400. an ultraviolet lamp.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

In order to solve the technical problem that the preservation performance of the preservation dining car in the prior art is gradually deteriorated along with the increase of the use time, referring to fig. 1-5, the utility model discloses the preservation dining car, and materials which have higher requirements on the temperature or the humidity of the environment, such as medicines, foods and the like can be accommodated in the dining car. The dining car is also limited to a car for delivering food or medicines, can also deliver other materials with higher requirements on the environment, is applied to large public facilities such as hospitals, hotels, office buildings, airports and the like, and can also be applied to military occasions such as prisons, camps and the like.

Referring to fig. 1-3, the present invention discloses a fresh-keeping dining car, which comprises a heat preservation area 100, a cleaning device 200 and a ventilation pipeline 300. The heat preservation area 100 comprises a heating area 110 and a cooling area 120, wherein the heating area 110 is provided with a first heat pump, and the cooling area 120 is provided with a second heat pump. The cleaning device 200 comprises a first water collecting member 210 arranged in the heating area 110, a second water collecting member 220 arranged in the cooling area 120 and a water discharging hole 230 arranged at the bottom of the vehicle, wherein the first water collecting member 210 and the first water collecting member 210 are respectively communicated with the water discharging hole 230. The ventilation duct 300 includes an air inlet 310 disposed at the roof of the vehicle and an air outlet 320 disposed at the bottom of the vehicle, at least two branches 330 are disposed between the air inlet 310 and the air outlet 320, and the two branches 330 respectively lead to the heating area 110 and the cooling area 120.

The refrigeration compartment 120 is provided to account for differences in the materials being transported, such as certain drugs that are easily denatured and require cryopreservation, or fruit drinks and frozen foods that require cryopreservation. The heating area 110 is provided because the food and staple food that need to be normally distributed need to be kept warm. The first heat pump is used for heating, the second heat pump is used for refrigerating, the working principle of the heat pump is consistent with that of compression refrigeration or heating, the compressor compresses circulating working media, and the purposes of refrigeration and heating are achieved through heat exchange. The heat pump is generally provided with a four-way valve for reversing the circulating working medium in the heat pump, and the purpose of interconversion between refrigeration and heating can be achieved after the working medium is reversed. Therefore, when the second heat pump operates in the forward direction, the refrigeration area 120 realizes refrigeration, and when the refrigeration area 120 needs defrosting, the second heat pump can be directly operated in the reverse direction, that is, the second heat pump can be heated to melt the frost. It is understood that the first heat pump in the heating area 110 may be replaced by a heating wire, and the heating effect may also be achieved. The first heat pump and the second heat pump are not shown in the figures, since they are usually provided in the vehicle body, such as in the vehicle floor, and are therefore not shown separately.

Referring to fig. 2, when transporting food at a high temperature, steam is inevitably generated in the heating area 110 to generate condensed water, and thus, in order to clean the condensed water in the warming area 100, a first water collecting member 210 is provided in the heating area 110 to collect the condensed water, and a second water collecting member 220 is provided in the cooling area 120 to collect frost-melted water and discharge the frost-melted water out of the vehicle through a water discharge hole 230.

Referring to fig. 3, the ventilation pipeline 300 is for circulating air in the thermal insulation area 100 to reduce the time for food and other materials to stay in the vehicle, thereby reducing the generation of odor. It should be noted that the ventilation line 300 may be operated intermittently to ensure the heat preservation effect of the heating zone 110 and the cooling zone 120. The branch 330 has an inner air outlet 350 at the top of the cooling area 120 and the heating area 110, and an inner air outlet (not shown) at the bottom of the car, so that the wind enters the inner air outlet 350 from the branch 330, and then the airflow finally enters the air outlet 320 through the inner air outlet 320 and is discharged out of the car.

According to the technical scheme, the heating area 110 and the refrigerating area 120 are arranged to place materials with different requirements, in order to timely clean steam condensate water generated in the heating area 110 and melt water generated in the refrigerating area 120, the heating area 110 is provided with the first water collecting part 210, the refrigerating area 120 is provided with the second water collecting part 220, and water is discharged out of the vehicle through the water discharge hole 230, so that the freshness of the materials and the environmental sanitation in the vehicle are guaranteed, furthermore, the ventilation pipeline 300 can ventilate the refrigerating area 120 and the heating area 110, peculiar smell is timely removed, and meanwhile, the freshness keeping performance of the materials is further improved. Consequently, this use is novel to keep warm, clear up and dispel peculiar smell combination application to reach the fresh-keeping requirement to the material transportation, to the clearance of the interior environment of heat preservation district 100, can very big degree relieve the problem that the interior environment variation of car leads to the freshness retaining performance variation.

Referring to fig. 2 and 4, in a preferred embodiment, the heating area 110 and the cooling area 120 are provided with vertical enclosing plates 130, the bottom of the enclosing plates 130 is provided with a containing groove 131, the containing groove 131 is matched with the first water collecting piece 210 and the second water collecting piece 220, the first water collecting piece 210 and the second water collecting piece 220 are provided with water collecting openings 211, and the condensed water is collected into the water collecting openings 211 through the enclosing plates 130. In order to distinguish the heating area 110 from the cooling area 120, the enclosing plate 130 is arranged in the heating area 110 and the cooling area 120, so that condensed water and frost are formed near the enclosing plate 130, other condensed water and frost are directly dropped on the bottom plate of the heat preservation area 100, and water flow on the bottom plate can be directly guided to enter the water drainage holes 230. Therefore, in order to improve the water collecting capacity, the receiving groove 131 is provided on the surrounding plate 130 to receive the first water collecting member 210 or the second water collecting member 220. The receiving groove 131 should receive or accommodate a part or all of the first water collecting member 210 (or the second water collecting member 220). It will be appreciated that the size and dimensions of the water collection opening 211 should be slightly larger than the dimensions of the shroud 130 to maximize the collection of water from the shroud 130 into the water collection opening 211.

Referring to fig. 4, further, in the above embodiment, the water collecting opening 211 is surrounded by the flow guide plate 2111, and the horizontal sectional area of the water collecting opening 211 is gradually reduced from top to bottom. The size of the water collecting opening 211 should be set to be slightly larger to ensure the collecting area, and the size of the first water collecting member 210 or the second water collecting member 220 should not be too large to reduce the space occupied by the heating area 110 and the cooling area 120, so that the sectional area of the water collecting opening 211 is gradually reduced from top to bottom in this embodiment to ensure that the heat preservation area 100 has enough accommodating space. Specifically, the water collection port 211 is surrounded by the flow guide plate 2111, and then the flow guide plate 2111 may be obliquely disposed. In this embodiment, the water collecting opening 211 is a rectangular slot structure.

Referring to fig. 5, in a preferred embodiment, the branch 330 includes a plurality of segments of the connecting tube 331, the connecting tube 331 is detachably connected to each other, the connecting tube 331 has a first port 3311 and a second port 3312, and the inner wall of the first port 3311 and/or the second port 3312 is provided with a filter 340. In practical applications, considering the structure of the vehicle body, the branch path 330 is mostly hidden inside the vehicle body, and only the air inlet 310 and the air outlet 320 need to be exposed outside the vehicle body, so that the position and the assembly length of the branch path 330 can be flexibly changed by using a plurality of connecting pipes 331 for easy installation and maintenance. The connecting tube 331 has a first port 3311 and a second port 3312 for connecting other connecting tubes 331, and the first port 3311 and the second port 3312 are internally provided with a filter 340, so that air in the air inlet 310 can be effectively filtered. The filtering element 340 may be a physical filtering element, such as a filtering net or a porous element with multiple functions of adsorption, or a chemical filtering element, such as a filtering solution, to prevent excessive dust or odor from entering the thermal insulation area 100, so as to avoid the damage of the external air to the thermal insulation area 100 while ensuring ventilation. The filtering members 340 can be disposed in the first port 3311 and/or the second port 3312, the number of the filtering members 340 can be adjusted according to actual requirements, when the length of the connecting tube 331 is large, two filtering members 340 can be disposed, and when the length of the connecting tube 331 is short, one filtering member 340 is disposed in the connecting tube 331 to prevent the flow rate of the airflow from being reduced due to the excessive filtering members 340.

Further, in the above embodiment, the filter 340 is configured as a filter net, the filter net includes a filter support, the inner wall of the connecting tube 331 is provided with a clamping groove, and the filter support abuts against the clamping groove. Filter piece 340 and adopt the physical mode to filter, and the filter screen sets up in connecting pipe 331 through filtering the support, and filtering support and draw-in groove are the joint structure, and for detachable construction, make things convenient for maintainer regularly to clear up connecting pipe 331 and change. Wherein, in order to adjust the position of filter screen, the draw-in groove can set up to a plurality of side by side respectively at the both ends of connecting pipe 331 to rationally select according to actual need.

Referring to fig. 1 and 3, in a preferred embodiment, heating zone 110 is provided with a humidifying component, which includes a water tank 141 disposed outside the vehicle and a mist generating component 142 disposed inside heating zone 110, and a mist outlet of mist generating component 142 is communicated with heating zone 110. Since the temperature of the heating area 110 is high, for food, moisture is evaporated from food and dishes as well as main food, and if the food is transported for a long time, the taste of the food becomes dry and the fresh-keeping effect cannot be achieved, therefore, in order to ensure that the humidity of the environment is maintained in a proper range, the mist generating member 142 is disposed in the heating area 110, water in the water tank 141 is sent into the mist generating member 142 through a pipeline, and then the mist generating member 142 generates mist to spray into the heating area 110. The spraying angle and the spraying distance of the spray should ensure that the spray does not directly form water drops on the food, so as to prevent the food from directly causing the taste deterioration.

Referring to fig. 3, in a preferred embodiment, the fresh food cart further comprises a sterilizing device including an ultraviolet lamp 400 disposed in the heating zone 110. The sterilizing device can sterilize and disinfect the food or medicines inside, and reduce the generation of bacteria breeding and peculiar smell. In combination with the enclosure 130 structure of the foregoing embodiment, the wires of the ultraviolet lamps can enter the enclosure 130 through the top plate or the bottom plate, so as to control the on/off of the ultraviolet lamps 400.

Referring to fig. 2 and 3, in a preferred embodiment, at least one of the intake vent 310 and/or the exhaust vent 320 is provided, and the intake vent 310 faces the head of the dining car and the exhaust vent 320 faces the tail of the dining car. At least one of the intake vent 310 and the exhaust vent 320 is provided, and in this embodiment, two intake vents 310 are provided. Along with the advance of the dining car, the intake of the air inlet 310 will increase greatly, and the air outlet 320 faces the tail of the car, bringing out the water vapor and the peculiar smell in the heat preservation area 100. The air inlet plate is opened, air enters the air inlet 310, the heat preservation area 100 starts to perform ventilation operation, the air inlet plate is closed, air cannot enter the air inlet 310, and ventilation operation is not performed. The outlet 320 is disposed toward the rear of the vehicle, and the air flow discharged from the vehicle can affect the operators on both sides, and of course, if the influence of the wind direction is considered as a main factor, the outlet 320 is disposed toward the ground in the present embodiment in order to reduce the discharge resistance of the air flow in the vehicle.

Further, in the above embodiment, the air inlet 310 is provided with an openable and closable air inlet plate, and the air inlet plate is inclined from the head to the tail. The air inlet plate can control the air quantity entering the ventilation pipeline, and the structure of the air inlet plate is specifically arranged in the air inlet 310 in a turnover mode. When the ventilation function is closed, the air inlet 310 is closed by the air inlet plate, and when the ventilation function is opened, the air inlet plate can be opened by a corresponding preset angle. The air inlet plate is inclined from the front end of the front side to the rear end of the rear side in a closed state, so that the resistance of the dining car in the advancing process can be reduced.

In a preferred embodiment, the water outlet 230 is provided with an electric valve, the air inlet 310 is provided with a fan, and the fresh food cart further comprises a control device which is electrically connected with the first heat pump, the second heat pump, the electric valve and the fan. The control device can be arranged in the vehicle, and an operator can set working modes and parameters through the display screen. In order to improve the automation degree of the whole dining car, an electric valve is arranged on the water discharge hole 230, and water in the refrigerating area 120 and the heating area 110 can be discharged out of the car through manual operation or automatic operation of a control device. The operating parameters of the first heat pump and the second heat pump can also be adjusted by the control device, and the temperature of the heating area 110 and the temperature of the cooling area 120 can be adjusted in real time. The control device can control the opening of the ventilation pipeline 300 according to the starting of the fan. Therefore, during the transportation of the dining car, the control device can automatically control the temperature and the ventilation in the heat preservation area 100, and timely clean and discharge the internal water flow according to a preset mode.

In connection with the above-mentioned embodiments, a disinfection device is further disposed in the insulated area 100, and the opening or closing of the disinfection device can be automated by the control device.

The fresh-keeping dining car is also suitable for the unmanned vehicle type, and is more beneficial to improving the automation degree of the unmanned transport vehicle.

It is noted that, in this document, relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

The foregoing are merely exemplary embodiments of the present invention, which enable those skilled in the art to understand or practice the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the utility model. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A fresh food cart, comprising:

the heat preservation area (100) comprises a heating area (110) and a refrigerating area (120), wherein the heating area (110) is provided with a first heat pump, and the refrigerating area (120) is provided with a second heat pump;

the cleaning device (200) comprises a first water collecting member (210) arranged in the heating area (110), a second water collecting member (220) arranged in the cooling area (120) and a water discharging hole (230) arranged at the bottom of the vehicle, wherein the first water collecting member (210) and the first water collecting member (210) respectively lead to the water discharging hole (230); and the number of the first and second groups,

the ventilation pipeline (300) comprises an air inlet (310) arranged on the roof of the vehicle and an air outlet (320) arranged at the bottom of the vehicle, at least two branches (330) are arranged between the air inlet (310) and the air outlet (320), and the two branches (330) are respectively communicated with the heating area (110) and the cooling area (120).

2. The fresh-keeping dining car according to claim 1, wherein the heating area (110) and the cooling area (120) are provided with vertical enclosing plates (130), the bottom of the enclosing plates (130) is provided with a containing groove (131), the containing groove (131) is matched with the first water collecting piece (210) and the second water collecting piece (220), the first water collecting piece (210) and the second water collecting piece (220) are provided with water collecting openings (211), and condensed water is collected into the water collecting openings (211) through the enclosing plates (130).

3. The fresh-keeping dining car according to claim 2, wherein the water collecting opening (211) is surrounded by a flow guide plate (2111), and the horizontal sectional area of the water collecting opening (211) is gradually reduced from top to bottom.

4. The refreshment trolley according to claim 1, wherein the branch (330) comprises a plurality of segments of the connecting tube (331), the connecting tube (331) is detachably connected to each other, the connecting tube (331) is provided with a first port (3311) and a second port (3312), and an inner wall of the first port (3311) and/or the second port (3312) is provided with a filter (340).

5. The fresh-keeping dining car according to claim 4, wherein the filter element (340) is provided as a filter screen, the filter screen comprises a filter support, the inner wall of the connecting pipe (331) is provided with a clamping groove, and the filter support abuts against the clamping groove.

6. The fresh-keeping dining car according to claim 1, wherein the heat-generating area (110) is provided with a humidifying member, the humidifying member comprises a water tank (141) arranged outside the car and a spray generating member (142) arranged in the heat-generating area (110), and a mist outlet of the spray generating member (142) is communicated with the heat-generating area (110).

7. The fresh-keeping trolley according to claim 1, further comprising a sterilizing device comprising an ultraviolet lamp (400) disposed in the heat-producing zone (110).

8. The fresh-keeping dining car according to claim 1, wherein at least one air inlet (310) and/or air outlet (320) is provided, and the air inlet (310) faces the head of the dining car and the air outlet (320) faces the tail of the dining car.

9. The fresh-keeping dining car as claimed in claim 8, wherein the air inlet (310) is provided with an air inlet plate which can be opened and closed, and the air inlet plate is inclined towards the tail of the car from the head of the car.

10. The fresh-keeping dining car as claimed in claim 1, wherein said drain hole (230) is provided with an electric valve, said air inlet (310) is provided with a fan, and said fresh-keeping dining car further comprises a control device, said control device is electrically connected with said first heat pump, said second heat pump, said electric valve and said fan.