CN106820789B

CN106820789B - Double-evaporator vertical refrigeration showcase

Info

Publication number: CN106820789B
Application number: CN201710180464.9A
Authority: CN
Inventors: 陈翔; 陈宝银; 赵勇; 查璐
Original assignee: Xuancheng Yixue Refrigeration Equipment Co ltd
Current assignee: Xuancheng Yixue Refrigeration Equipment Co ltd
Priority date: 2017-03-24
Filing date: 2017-03-24
Publication date: 2023-06-13
Anticipated expiration: 2037-03-24
Also published as: CN106820789A

Abstract

The invention discloses a double-evaporator vertical refrigeration display cabinet, which comprises a display area and a compressor chamber, wherein the display area comprises a refrigerating chamber, an upper evaporator air channel and a lower evaporator air channel are distributed at the top and the bottom of the refrigerating chamber, the upper evaporator air channel and the lower evaporator air channel extend along the front-back direction, a main evaporator and a lower evaporator fan are arranged in the lower evaporator air channel, and a sub-evaporator and an upper evaporator fan are arranged in the upper evaporator air channel; the air outlet of the upper evaporator air channel corresponds to the air return opening of the lower evaporator air channel and is positioned near the front end of the transparent cabinet door, and the air return opening of the upper evaporator air channel corresponds to the air outlet of the lower evaporator air channel and is positioned at the rear end of the refrigerating chamber, so that a cold air curtain is formed by cold air flow from top to bottom in the inner side of the transparent cabinet door in the refrigerating chamber. The invention has the advantages that: the cold air curtain can isolate the external air from the internal cold air, so that the temperature distribution of the display area is more uniform and the cold energy loss is reduced.

Description

Double-evaporator vertical refrigeration showcase

Technical Field

The invention relates to the technical field of refrigeration equipment, in particular to a double-evaporator vertical refrigeration display cabinet.

Background

At present, the vertical display cabinet used for cake shops and supermarkets is high in vertical height and large in door opening area, the existing vertical refrigeration display cabinet is mainly provided with an evaporator at the top of the cabinet, fan power and cold air are utilized to sink on the inner side of a glass door to form an air curtain, but due to the fact that the negative pressure in a lower air duct is insufficient, the effect of a diversion cavity is poor, the air circulation efficiency is low, the air curtain quality is poor, the frequent opening temperature is slow, the air circulation of the air duct is slow, the temperature distribution in the cabinet is uneven, and the stored food is at risk of deterioration.

Disclosure of Invention

The invention aims to overcome the defects of the prior art, and provides a double-evaporator vertical refrigeration display cabinet, so as to overcome the defects of uneven temperature distribution, slow temperature drop and poor air curtain quality in the existing large-volume vertical refrigeration display cabinet.

The invention is realized by the following technical scheme:

the utility model provides a vertical refrigeration show cupboard of two evaporators, includes the show area and is located the compressor room of show area below, the show area includes the refrigerator compartment that the place ahead was sealed by transparent cabinet door, refrigerator compartment top and bottom distribute and are provided with upper portion evaporimeter wind channel and lower part evaporimeter wind channel, upper portion evaporimeter wind channel and lower part evaporimeter wind channel all extend along fore-and-aft direction, be provided with main evaporimeter and lower part evaporimeter fan in the lower part evaporimeter wind channel, be provided with vice evaporimeter and upper portion evaporimeter fan in the upper portion evaporimeter wind channel, main evaporimeter and vice evaporimeter sharing are located the compressor in the compressor room; the air outlet of the upper evaporator air channel corresponds to the air return opening of the lower evaporator air channel and is positioned close to the front end of the transparent cabinet door, and the air return opening of the upper evaporator air channel corresponds to the air outlet of the lower evaporator air channel and is positioned at the rear end of the refrigerating chamber, so that a complete internal refrigerating air circulation flow channel is formed in the refrigerating chamber, and a cold air curtain is formed by the cold air flow from top to bottom in the refrigerating chamber.

As the preferred implementation mode of the technical scheme, the showcase further comprises a dew removing air duct, the dew removing air duct is arranged on one side, close to the transparent cabinet door, of the upper portion of the compressor chamber, an air inlet of the dew removing air duct is communicated with the compressor chamber, an air outlet of the dew removing air duct is located on the outer side of the transparent cabinet door and is communicated with the outside, and a dew removing air duct fan is arranged in the compressor chamber and located at the air inlet of the dew removing air duct.

As a preferred implementation mode of the technical scheme, the transparent cabinet door is a double-layer hollow glass door with a molecular sieve interlayer.

As the preferable implementation mode of the technical scheme, the humidifier is further arranged in the air duct of the lower evaporator, the humidifier is controlled to be turned on or off through the humidity controller, and the water adding position of the humidifier is prompted through light.

As a preferred embodiment of the above technical solution, the upper evaporator fan is installed outside the return air inlet of the upper evaporator air duct to supply air to the upper evaporator air duct.

As a preferred embodiment of the above technical solution, the lower evaporator fan is installed in front of the main evaporator.

As the preferable implementation mode of the technical scheme, a first air guide baffle plate for guiding cold air vertically upwards is arranged at the air outlet of the lower evaporator air channel, and a second air guide baffle plate for guiding cold air vertically downwards is arranged at the air outlet of the upper evaporator air channel.

As the preferred implementation mode of the technical scheme, the refrigeration system of the showcase comprises a capillary tube, a main evaporator, a secondary evaporator, a compressor and a condenser, and the capillary tube, the main evaporator, the secondary evaporator, the compressor and the condenser are sequentially connected in series to form a refrigeration loop.

As the preferred implementation mode of the technical scheme, the refrigeration system of the showcase comprises a capillary tube, a main evaporator, a secondary evaporator, a compressor and a condenser, wherein the main evaporator and the secondary evaporator are connected in parallel, an inlet of the main evaporator and an inlet of the secondary evaporator are connected with the capillary tube through a three-way valve, and an outlet of the main evaporator and an outlet of the secondary evaporator are connected with the compressor through pipelines.

As a preferred implementation manner of the technical scheme, the box body of the display area consists of a shell, an indoor baffle plate and a foaming layer positioned between the shell and the indoor baffle plate.

Compared with the prior art, the invention has the following advantages:

1. according to the invention, the two evaporators are arranged, and the air outlet and the air return inlet of the upper evaporator air channel are respectively and correspondingly arranged with the air return inlet and the air outlet of the lower evaporator air channel, so that a good internal refrigeration air circulation air channel is formed in the refrigerating chamber, when people push open the transparent cabinet door, the cold air curtain from top to bottom on the inner side of the transparent cabinet door isolates the external air from the internal cold air, thereby reducing the cold energy loss caused by frequent opening of the transparent cabinet door, ensuring good air circulation in the refrigerating chamber due to the arrangement of the upper evaporator air channel and the lower evaporator air channel, avoiding large temperature difference and ensuring the food storage quality.

2. According to the scheme, the capillary tube, the main evaporator and the auxiliary evaporator are connected in series, the refrigerant from the capillary tube flows through the main evaporator and then flows through the auxiliary evaporator, and the different evaporation amounts of the refrigerant flowing through the main evaporator and the auxiliary evaporator are distributed by designing different lengths of heat exchange tubes of the evaporators, so that the different heat exchange effects of the two evaporators are achieved; according to the scheme, the main evaporator and the auxiliary evaporator are connected in parallel through the three-way valve, the refrigerant from the capillary tube is distributed and then enters the main evaporator and the auxiliary evaporator respectively, and different heat exchange effects of the two evaporators are achieved through different refrigerant flows flowing through the main evaporator and the auxiliary evaporator. In general, when a main evaporator and an evaporator are used in series, the flow of the refrigerant is controllable and high in predictability, and the heat exchange quantity of the two air channels is controlled by controlling the evaporation quantity of the refrigerant in the two evaporators in series; when the evaporators are connected in parallel, the three-way valve is used for regulating the flow of the refrigerant, so that the flow distribution is convenient, and the pipeline resistance is small.

3. The humidifier can effectively prevent food air drying caused by forced convection and low humidity through humidity control, the humidifier is started when the humidity in the cabinet is lower than the set lowest humidity, the humidifier is closed when the humidity reaches the set highest humidity, and the light is used for prompting the water adding position of the humidifier, so that the humidifier is visual and convenient. Because the vertical refrigeration show cupboard has the transparent cabinet door surface of large tracts of land, dew easily in transparent cabinet door outside, the dew removal wind channel that sets up utilizes compressor and condenser to be detained in the waste heat in compressor room with the dew removal wind channel fan to bleed and forms hot air convection at transparent cabinet door surface, cooperates the molecular sieve in the double-deck cavity glass door intermediate layer to prevent the condensation. The double-layer hollow glass door and the foaming layer between the indoor baffle and the shell increase the thermal resistance of the display cabinet, so that the whole display cabinet has good heat insulation performance.

Drawings

Fig. 1 is a schematic structural view of an embodiment of the present invention.

Fig. 2 is a schematic diagram of a refrigeration system in which two evaporators are connected in series in an embodiment of the invention.

Fig. 3 is a schematic diagram of a structure in which two evaporators of a refrigeration system are connected in parallel in an embodiment of the present invention.

Reference numerals in the drawings: the air conditioner comprises a lower evaporator fan 1, a main evaporator 2, a lower evaporator air duct 3, a lower air outlet 4, an indoor baffle 5, a foaming layer 6, a shell 7, an upper evaporator fan 8, an upper air return port 9, a secondary evaporator 10, an upper evaporator air duct 11, an upper air outlet 12, a transparent cabinet door 13, a refrigerating chamber 14, an air outlet with a dew removing air duct 15, a dew removing air duct 16, a lower air return port 17, a humidifier 18, a dew removing air duct fan 19, a condenser 20, a three-way valve 21, a frame 22, a capillary tube 23, a compressor 24 and a drying filter 25.

Detailed Description

The following describes in detail the examples of the present invention, which are implemented on the premise of the technical solution of the present invention, and detailed embodiments and specific operation procedures are given, but the scope of protection of the present invention is not limited to the following examples.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present invention, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

Referring to fig. 1, this embodiment discloses a vertical refrigeration show cupboard of two evaporators, including show district and be located the compressor room of show district below, the show district includes the place ahead by transparent cabinet door 13 sealed refrigerating chamber 14, transparent cabinet door 13 is the double-deck cavity glass door that has molecular sieve intermediate layer, the box of show district comprises shell 7, indoor baffle 5, and be located the foaming layer 6 between shell 7 and the indoor baffle 5 for the cabinet body has good heat preservation effect when guaranteeing the show area.

The top and bottom of the refrigerating chamber are provided with an upper evaporator air channel 11 and a lower evaporator air channel 3, and the upper evaporator air channel 11 and the lower evaporator air channel 3 extend along the front-back direction, wherein an air outlet of the upper evaporator air channel 11 is an upper air outlet 12, an air return is an upper air return 9, an air outlet of the lower evaporator air channel 3 is a lower air outlet 4, and an air return is a lower air return 17. A main evaporator 2 and a lower evaporator fan 1 are arranged in the lower evaporator air duct 3, and the lower evaporator fan 1 is arranged in front of the main evaporator 2. The auxiliary evaporator 10 and the upper evaporator fan 8 are arranged in the upper evaporator air duct 11, and the upper evaporator fan 8 is arranged outside the upper return air inlet 9 of the upper evaporator air duct 11 to supply air to the upper evaporator air duct 11. The main evaporator 2 and the sub-evaporator 10 share a compressor 24 located in the compressor compartment. The upper air outlet 12 of the upper evaporator air duct 11 corresponds to the lower air return opening 17 of the lower evaporator air duct 3 and is positioned near the front end of the transparent cabinet door 13, the upper air return opening 9 of the upper evaporator air duct 11 corresponds to the lower air outlet 4 of the lower evaporator air duct 3 and is positioned at the rear end of the refrigerating chamber 14, the air outlet of the lower evaporator air duct 3 is provided with a first air guide baffle for guiding cold air vertically upwards, and the air outlet of the upper evaporator air duct 11 is provided with a second air guide baffle for guiding cold air vertically downwards. So that a complete internal refrigeration air circulation flow channel is formed inside the refrigerating chamber 14, and a cold air curtain is formed by cold air flow from top to bottom inside the transparent cabinet door 13 inside the refrigerating chamber 14. The refrigerating air in the refrigerating chamber 14 flows through the main evaporator 2 from the lower evaporator fan 1, is blown out from the lower air outlet 4, enters the upper air return opening 9 of the upper evaporator air channel through the upper evaporator fan 8 after cooling food in the refrigerating chamber 14, is blown out from the upper air outlet 12 after being cooled by the auxiliary evaporator 10 to form a cold air curtain from top to bottom, forms the cold air curtain to prevent cold air loss in the cabinet when the double-layer hollow glass door is opened, and circulates again after entering the lower evaporator air channel 3 through the lower air return opening 17, thus forming a complete internal refrigerating air circulation flow channel.

In the embodiment, by matching different environments where the main evaporator 2 and the auxiliary evaporator 10 are located and the required functional characteristics of the main evaporator 2 and the auxiliary evaporator, due to the arrangement of the humidifier 18, the humidity of the environment where the main evaporator 2 is located is high, the condensation is easy, and the fin density of the main evaporator 2 is not excessively high; the auxiliary evaporator 10 is arranged at the top, the humidity of the environment is smaller than that of the main evaporator 2, the condensate is less than that of the main evaporator 2, and the heat exchange capacity of the auxiliary evaporator can be improved by using fins with high density.

The humidifier 18 is further arranged in the lower evaporator air duct 3, the humidifier 18 is controlled to be turned on and turned off through the humidity controller, the water adding position of the humidifier 18 is prompted through light, the humidifier 18 is turned on when the humidity in the refrigerating chamber 14 is lower than the set minimum humidity, and the humidifier 18 is turned off when the humidity in the refrigerating chamber 14 reaches the set maximum humidity, so that the humidity in the refrigerating chamber is controlled.

The showcase further comprises a dew removing air duct 16, the dew removing air duct 16 is arranged on one side, close to the transparent cabinet door 13, of the upper portion of the compressor chamber, an air inlet of the dew removing air duct 16 is communicated with the compressor chamber, an air outlet of the dew removing air duct 16 is located on the outer side of the transparent cabinet door 13 and is communicated with the outside, and a dew removing air duct fan 19 is arranged in the compressor chamber and located at the air inlet of the dew removing air duct 16. The hot air generated by the condenser 20 and the compressor 24 is blown out from the air outlet 15 of the dew removing air duct by the air draft fan 19 to form a hot air curtain on the outer surface of the double-layer hollow glass door to prevent dew. The condenser 20 and the compressor 24 are mounted on a bottom housing 22.

The refrigeration system of the showcase can adopt two schemes:

referring to fig. 2, a scheme is that a main evaporator 2 and a sub-evaporator 10 are connected in series, that is, a refrigeration system comprises a dry filter 25, a capillary tube 23, the main evaporator 2, the sub-evaporator 10, a compressor 24 and a condenser 20, and the dry filter 2, the capillary tube 23, the main evaporator 2, the sub-evaporator 10, the compressor 24 and the condenser 20 are connected in series in sequence to form a refrigeration loop; the refrigerating circuit controls the heat exchange quantity by distributing the evaporation quantity of the refrigerant in the main evaporator 2 and the auxiliary evaporator 10 by passing the refrigerant from the capillary tube 23 through the main evaporator 2 and then passing the auxiliary evaporator 10;

referring to fig. 3, another solution is that the main evaporator 2 and the auxiliary evaporator 10 are connected in parallel, that is, the refrigeration system includes a dry filter 25, a capillary tube 23, the main evaporator 2, the auxiliary evaporator 10, a compressor 24 and a condenser 20, the main evaporator 2 and the auxiliary evaporator 10 are connected in parallel, the inlet of the main evaporator 2 and the auxiliary evaporator 10 are connected with the capillary tube 23 through a three-way valve 21, and the outlets of the main evaporator 2 and the auxiliary evaporator 10 are connected with the compressor 24 through pipelines. The refrigerant from the capillary tube 23 is distributed and then respectively enters the main evaporator 2 and the auxiliary evaporator 10, the flow rate of the refrigerant distributed by the main evaporator 2 is larger, and the flow rate of the refrigerant distributed by the auxiliary evaporator 10 is smaller; the main evaporator 2 plays a role of main cooling air in the system, and the auxiliary evaporator 10 plays a role of secondary cooling air in the system so as to make the temperature in the refrigerating chamber uniform and simultaneously cooperate with the upper evaporator fan 8 to improve the cold air curtain quality.

The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.

Claims

1. The utility model provides a vertical refrigeration show cupboard of double evaporator, includes the show district and is located the compressor room of show district below, the show district includes the place ahead by transparent cabinet door (13) sealed cold-stored room (14), its characterized in that: the top and the bottom of the refrigerating chamber are provided with an upper evaporator air channel (11) and a lower evaporator air channel (3) in a distributed manner, the upper evaporator air channel (11) and the lower evaporator air channel (3) extend along the front-back direction, a main evaporator (2) and a lower evaporator fan (1) are arranged in the lower evaporator air channel (3), a secondary evaporator (10) and an upper evaporator fan (8) are arranged in the upper evaporator air channel (11), and the main evaporator (2) and the secondary evaporator (10) share a compressor (24) positioned in the compressor chamber; the air outlets of the upper evaporator air channels (11) correspond to the air return openings of the lower evaporator air channels (3) and are both positioned near the front end of the transparent cabinet door (13), and the air return openings of the upper evaporator air channels (11) correspond to the air outlets of the lower evaporator air channels (3) and are both positioned at the rear end of the refrigerating chamber (14), so that a complete internal refrigerating air circulation channel is formed in the refrigerating chamber (14), and a cold air curtain is formed by cold air flows from top to bottom in the inner side of the transparent cabinet door (13) in the refrigerating chamber (14);

the display cabinet further comprises a dew removing air duct (16), the dew removing air duct (16) is arranged on one side, close to the transparent cabinet door (13), of the upper portion of the compressor chamber, an air inlet of the dew removing air duct (16) is communicated with the compressor chamber, an air outlet of the dew removing air duct is located on the outer side of the transparent cabinet door (13) and is communicated with the outside, and a dew removing air duct fan (19) is arranged in the compressor chamber and located at the air inlet of the dew removing air duct (16);

a first air guide baffle plate for vertically guiding cold air upwards is arranged at the air outlet of the lower evaporator air duct (3), and a second air guide baffle plate for vertically guiding cold air downwards is arranged at the air outlet of the upper evaporator air duct (11);

the refrigerating system of the showcase comprises a capillary tube (23), a main evaporator (2), a secondary evaporator (10), a compressor (24) and a condenser (20), wherein the main evaporator (2) and the secondary evaporator (10) are connected in parallel, an inlet of the main evaporator (2) and an inlet of the secondary evaporator (10) are connected with the capillary tube (23) through a three-way valve (21), and an outlet of the main evaporator (2) and an outlet of the secondary evaporator (10) are connected with the compressor (24) through pipelines.

2. A dual evaporator vertical refrigeration display case as set forth in claim 1 wherein: the transparent cabinet door (13) is a double-layer hollow glass door with a molecular sieve interlayer.

3. A dual evaporator vertical refrigeration display case as set forth in claim 1 wherein: a humidifier (18) is further arranged in the lower evaporator air duct (3), the opening and closing of the humidifier (18) are controlled through a humidity controller, and the water adding position of the humidifier (18) is prompted through lamplight.

4. A dual evaporator vertical refrigeration display case as set forth in claim 1 wherein: the upper evaporator fan (8) is arranged outside the return air inlet of the upper evaporator air duct (11) and supplies air to the upper evaporator air duct (11).

5. A dual evaporator vertical refrigeration display case as set forth in claim 1 wherein: the lower evaporator fan (1) is mounted in front of the main evaporator (2).

6. A dual evaporator vertical refrigeration display case as set forth in claim 1 wherein: the refrigeration system of the showcase comprises a capillary tube (23), a main evaporator (2), a secondary evaporator (10), a compressor (24) and a condenser (20), wherein the capillary tube (23), the main evaporator (2), the secondary evaporator (10), the compressor (24) and the condenser (20) are sequentially connected in series to form a refrigeration loop.

7. A dual evaporator vertical refrigeration display case as set forth in claim 1 wherein: the box body of the display area consists of a shell (7), an indoor baffle plate (5) and a foaming layer (6) positioned between the shell (7) and the indoor baffle plate (5).