Steam defrosting type evaporator structure

Abstract

The utility model discloses a steam defrosting type evaporator structure which is arranged in a refrigeration house and comprises a shell and a steam jet defrosting system arranged in the shell, a fan is arranged on the side wall of the shell, a fin heat exchange core body is arranged in the shell, the shell is further connected with a condensation water drainage pipe, and the condensation water drainage pipe is connected with an evaporator. The condensation drain pipe penetrates through the refrigeration house to be communicated with the outside; the steam jet defrosting system comprises an automatic water replenishing device, an instant steam generator, a steam pump, a steam conveying pipeline and a steam nozzle; the instant steam generator is respectively connected with the automatic water replenishing device and the steam pump, and the steam pump is communicated with the steam nozzle through a steam conveying pipeline; the steam nozzle is arranged at the top of the inner side of the shell, and the fin heat exchange core is located below the steam nozzle. The steam nozzle is arranged at the top, steam is jetted to the fin heat exchange core body on the lower portion, so that a frost layer is gradually melted from top to bottom, and the defrosting efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to cold storage defrosting technical field, concretely relates to a steam defrosting type evaporator structure. BACKGROUND

[0002] In the running process of the cold storage, the water vapor in the air condenses on the surface of the evaporator due to the cold, and gradually forms a frost layer. The formation of the frost layer reduces the heat transfer efficiency of the evaporator, resulting in a decrease in the refrigeration effect of the refrigeration system. At the same time, the frost layer also increases the energy consumption of the refrigeration system, and in severe cases, it may even cause the refrigeration equipment to fail. In addition, the frost layer may also affect the storage space of the cold storage and the quality of the goods. Regular defrosting can keep the evaporator clean and improve the heat transfer efficiency, thereby ensuring the normal operation of the refrigeration system.

[0003] In the prior art, the defrosting methods commonly used include electric defrosting, hot gas defrosting and water defrosting. Among them, the electric defrosting uses an electric heating tube to melt the frost layer, which has a large impact on the temperature of the cold storage during heating, high power consumption, and incomplete defrosting, and the electric heating tube frequently works and is prone to aging failure. The hot gas defrosting uses the high-temperature refrigerant overheat steam discharged by the compressor to melt the frost layer, which has a high installation cost, and cannot be used in cold storage places where flammable and explosive storage goods are stored. Although the water defrosting is energy-saving and does not affect the temperature of the cold storage, it is easy to cause damage to paper packaging goods when ice blockage occurs, and the water temperature is not easy to control in northern areas, which is not convenient to use and maintain.

[0004] In summary, the existing defrosting methods cannot simultaneously solve the problems of high cost, low defrosting efficiency and impact on the temperature of the cold storage. SUMMARY

[0005] In view of the problems in the related art, the utility model provides a steam defrosting type evaporator structure, which sprays steam downward to the finned heat exchange core through the steam nozzle arranged at the top, so that the frost layer is gradually melted from top to bottom, thereby improving the defrosting efficiency.

[0006] The utility model is implemented as follows:

[0007] A steam defrosting type evaporator structure is arranged in the cold storage, which comprises a shell and a steam injection defrosting system arranged in the shell, a fan is arranged on the side wall of the shell, a finned heat exchange core is arranged in the shell, the shell is further connected with a condensate drainage pipe, and the condensate drainage pipe is communicated with the outside through the cold storage;

[0008] The steam injection defrosting system comprises an automatic water supply device, an instant steam generator, a steam pump, a steam conveying pipeline and a steam nozzle; the instant steam generator is connected with the automatic water supply device and the steam pump respectively; the steam pump is communicated with the steam nozzle through the steam conveying pipeline; the steam nozzle is arranged at the top of the inner side of the shell, and the finned heat exchange core is located below the steam nozzle.

[0009] The automatic water supplementing device delivers water to the instant steam generator, the instant steam generator starts to work and generates steam, the steam is delivered to the steam nozzle by the steam pump, the steam nozzle sprays steam to the finned heat exchange core below, and the frost layer is melted from top to bottom, and the melted water is discharged to the cold storage through the condensate drain pipe.

[0010] Preferably, the top of the shell is provided with one or more steam nozzles.

[0011] Specifically, a plurality of steam nozzles are arranged side by side above the finned heat exchange core and spray steam downward to the finned heat exchange core. The specific number can be designed according to the size of the finned heat exchange core and the spray coverage area of the steam nozzle.

[0012] Preferably, the steam nozzle is a rotary steam nozzle.

[0013] Specifically, the rotary steam nozzle can cover the finned heat exchange core without dead angle when spraying steam, ensuring the defrosting effect.

[0014] Preferably, the steam pump and the steam nozzle are further provided with a solenoid valve, and the solenoid valve is connected with the steam nozzle through a steam delivery pipeline.

[0015] Specifically, the solenoid valve is mainly used to control the opening or closing of steam delivery. When defrosting starts, the instant steam generator and the steam pump start to work. At this time, the solenoid valve is opened, so that steam can be normally delivered to the steam nozzle and sprayed out.

[0016] Preferably, the steam pump and the solenoid valve are further provided with a pressure reducing valve.

[0017] Specifically, the pressure reducing valve arranged between the steam pump and the solenoid valve can stabilize the pressure, protect the equipment and pipeline, and also control the steam flow.

[0018] Preferably, a filter is arranged between the automatic water supplementing device and the instant steam generator, and the water in the automatic water supplementing device is filtered by the filter before entering the instant steam generator.

[0019] Specifically, the water is filtered before being delivered to the instant steam generator, which can effectively intercept and remove impurities in the water or chemical gases, particulate matters and the like in the air, thereby protecting the equipment and reducing the pipeline blockage.

[0020] Preferably, the sidewall of the shell is provided with a fan opening, the fan is arranged at the fan opening, and the inner side of the fan opening is further provided with a louver.

[0021] Specifically, when the defrosting is started, the fan stops working, the shutter is closed, and the steam is limited to the local closed space in the shell, so as to avoid affecting the temperature in the cold storage.

[0022] Preferably, the bottom of the shell is provided with an evaporator water pan, which is a tapered structure with a large upper part and a small lower part.

[0023] Specifically, since the steam is sprayed from top to bottom, the frost layer is gradually melted from top to bottom, and the melted water is collected in the evaporator water pan below the fin heat exchange core. The tapered structure of the evaporator water pan facilitates the collection of water through the evaporator water pan.

[0024] Preferably, the bottom of the evaporator water pan is provided with a condensate drain pipe, one end of which is in communication with the bottom of the evaporator water pan, and the other end is in communication with the outside through the cold storage.

[0025] Specifically, the evaporator water pan discharges the collected water to the outside of the cold storage through the condensate drain pipe at the bottom.

[0026] Preferably, the fin heat exchange core is located between the steam nozzle and the evaporator water pan.

[0027] Specifically, the steam nozzle arranged at the top of the shell sprays steam to the fin heat exchange core below, melts the frost layer, and the melted water flows to the evaporator water pan below the fin heat exchange core and is discharged, forming a complete defrosting and drainage structure.

[0028] Compared with the prior art, the utility model obtains the following beneficial effects:

[0029] The utility model provides a kind of steam defrosting formula evaporator structure, and it is melted frost quickly, completely and without dead angle by relatively easy steam, solves the influence of traditional defrosting mode on store temperature, high energy consumption and high cost, and the limitation problem such as use environment.

[0030] Meanwhile, by setting steam nozzle at the top, steam is sprayed to the fin heat exchange core below, so that the frost layer is gradually melted from top to bottom, and the melted water has a certain temperature, which further melts the lower part of the frost layer when flowing down, thereby improving the frost melting efficiency and making the defrosting more thorough. And steam is limited to local closed space, and will not affect the whole store temperature. DETAILED DESCRIPTION

[0031] Figure 1 It is the whole structure schematic view of a kind of steam defrosting formula evaporator structure in the utility model embodiment;

[0032] Figure 2 It is the principle schematic view of a kind of steam injection defrosting system in the utility model embodiment;

[0033] Figure 3 This is one of the schematic diagrams of the fan structure of a steam defrosting evaporator structure in an embodiment of this utility model;

[0034] Figure 4 This is a second schematic diagram of the fan structure of a steam defrosting evaporator structure according to an embodiment of this utility model;

[0035] Figure 5 This is the third schematic diagram of the fan structure of a steam defrosting evaporator structure in an embodiment of this utility model.

[0036] Figure label:

[0037] 101. Cold storage; 102. Shell; 103. Finned heat exchange core; 104. Fan; 105. Louvers; 106. Evaporator drip tray; 107. Condensate drain pipe;

[0038] 201. Automatic water replenishment device; 202. Instantaneous steam generator; 203. Steam pump; 204. Pressure reducing valve; 205. Solenoid valve; 206. Steam delivery pipeline; 207. Steam nozzle. Detailed Implementation

[0039] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only a part of the embodiments of the present utility model, and not all of them. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0040] Example

[0041] like Figures 1 to 5 A steam defrosting evaporator structure is installed inside a cold storage 101, including a shell 102 and a steam jet defrosting system installed inside the shell 102. A fan 104 is provided on the side wall of the shell 102, and a finned heat exchange core 103 is provided inside the shell 102. The shell 102 is also connected to a condensate drain pipe 107, which passes through the cold storage 101 and communicates with the outside.

[0042] The steam defrosting system comprises an automatic water supply device 201, an instant steam generator 202, a steam pump 203, a steam delivery pipeline 206 and a steam nozzle 207; the instant steam generator 202 is connected with the automatic water supply device 201 and the steam pump 203 respectively, the steam pump 203 is connected with the steam nozzle 207 through the steam delivery pipeline 206; the steam nozzle 207 is arranged at the top of the inner side of the shell 102, and the fin heat exchange core 103 is located below the steam nozzle 207.

[0043] The automatic water supply device 201 delivers water to the instant steam generator 202, the instant steam generator 202 starts to work and generates steam, the steam is delivered to the steam nozzle 207 through the steam pump 203, the steam nozzle 207 sprays steam downward to the fin heat exchange core 103, the frost layer is melted from top to bottom, and the melted water is discharged to the cold storage 101 through the condensate drain pipe 107.

[0044] The top of the shell 102 is provided with one or more steam nozzles 207.

[0045] A plurality of steam nozzles 207 are arranged side by side above the fin heat exchange core 103 and spray steam downward to the fin heat exchange core 103. The specific number can be designed according to the size of the fin heat exchange core 103 and the spraying coverage area of the steam nozzle 207.

[0046] The steam nozzle 207 is a rotary steam nozzle 207.

[0047] The rotary steam nozzle 207 can make the steam nozzle 207 cover the fin heat exchange core 103 in full range without dead angle when spraying steam, ensuring the defrosting effect.

[0048] The steam pump 203 and the steam nozzle 207 are further provided with an electromagnetic valve 205, and the electromagnetic valve 205 is connected with the steam nozzle 207 through the steam delivery pipeline 206.

[0049] The electromagnetic valve 205 is mainly used for controlling the opening or closing of steam delivery. When defrosting starts, the instant steam generator 202 and the steam pump 203 start to work, at this time, the electromagnetic valve 205 is opened, so that steam can be normally delivered to the steam nozzle 207 and sprayed out.

[0050] The steam pump 203 and the electromagnetic valve 205 are further provided with a pressure reducing valve 204.

[0051] The pressure reducing valve 204 arranged between the steam pump 203 and the electromagnetic valve 205 can stabilize the pressure, protect the equipment and pipeline, and also control the steam flow.

[0052] The filter is arranged between the automatic water supply device 201 and the instant steam generator 202, and the water in the automatic water supply device 201 is filtered by the filter before entering the instant steam generator 202.

[0053] The water is filtered before being transported to the instant steam generator 202, which can effectively intercept and remove impurities in the water or chemical gases, particulate matters and the like in the air, thereby protecting the equipment and reducing pipeline blockage.

[0054] The sidewall of the shell 102 is provided with a fan 104 port, the fan 104 is arranged at the fan 104 port, and the inner side of the fan 104 port is further provided with a louver 105.

[0055] When defrosting is started, the fan 104 stops working, and the louver 105 is closed, so that the steam action is limited to a local closed space in the shell 102, thereby avoiding affecting the temperature in the cold storage 101.

[0056] The bottom of the shell 102 is provided with an evaporator water pan 106, and the evaporator water pan 106 is a conical structure with a large upper part and a small lower part.

[0057] Since the steam is sprayed from top to bottom, the frost layer is gradually melted from top to bottom, and the melted water is collected in the evaporator water pan 106 below the fin heat exchange core 103, and the conical structure of the evaporator water pan 106 facilitates the collection of water through the evaporator water pan 106.

[0058] The bottom of the evaporator water pan 106 is provided with a condensate drain pipe 107, one end of the condensate drain pipe 107 is in communication with the bottom of the evaporator water pan 106, and the other end penetrates the cold storage 101 and communicates with the outside.

[0059] The evaporator water pan 106 discharges the collected water from the bottom condensate drain pipe 107 to the outside of the cold storage 101.

[0060] The fin heat exchange core 103 is located between the steam nozzle 207 and the evaporator water pan 106.

[0061] The steam nozzle 207 arranged at the top of the shell 102 sprays steam to the fin heat exchange core 103 below, melts the frost layer, and the melted water flows to the evaporator water pan 106 below the fin heat exchange core 103 and is discharged, forming a complete defrosting and drainage structure.

[0062] The shell 102 is further provided with a defrosting probe, which is mainly used for detecting the accumulated frost layer.

[0063] The utility model provides a kind of evaporator structure of steam defrosting type, and its defrosting principle is, after frost layer accumulation is detected by defrosting probe, steam jet defrosting system starts defrosting, fan 104 stops working at this time, louver 105 closes, instantaneous steam generator 202 and steam pump 203 start working immediately, electromagnetic valve 205 opens, and automatic water replenishing device 201 transports water to filter, after filtering, it enters instantaneous steam generator 202, and the steam generated enters steam pump 203, by steam pump 203 into pressure reducing valve 204, then through electromagnetic valve 205 and steam delivery line 206 reaches steam nozzle 207, steam nozzle 207 sprays steam to downwards fin heat exchange core body 103 and defrosts, frost layer melts gradually from top to bottom, and the water melted has certain temperature, and further melts lower part unmelted frost layer when flowing downwards, to improve defrosting efficiency, since steam effect is limited to local closed space, it will not affect the whole warehouse temperature, it is thoroughly defrosted without dead angle by steam that is relatively easy to obtain, and the defrosting efficiency is improved by the injection mode from top to bottom, and the effect of not affecting cold storage 101 temperature is achieved.

[0064] According to the disclosure and teaching of the above specification, the skilled in the art of the utility model can also change and modify the above embodiments. Therefore, the utility model is not limited to the specific embodiments disclosed and described above, and some modifications and changes of the utility model should fall within the protection scope of the claims of the utility model. In addition, although some specific terms are used in the specification, these terms are only for convenience of description, and do not constitute any limitation on the utility model.

Claims

1. A steam defrosting evaporator structure arranged in a cold storage, comprising a shell and a steam injection defrosting system arranged in the shell, a fan is arranged on the side wall of the shell, a fin heat exchange core is arranged in the shell, and a condensate drainage pipe is connected to the shell and communicates with the outside through the cold storage; characterized in that, the steam injection defrosting system comprises an automatic water supply device, an instant steam generator, a steam pump, a steam delivery pipeline and a steam nozzle; the instant steam generator is connected to the automatic water supply device and the steam pump respectively, the steam pump communicates with the steam nozzle through the steam delivery pipeline; the steam nozzle is arranged on the top of the inside of the shell, and the fin heat exchange core is arranged below the steam nozzle; the automatic water supply device delivers water to the instant steam generator, the instant steam generator starts to work and generates steam, the steam pump delivers the steam to the steam nozzle through the pipeline, the steam nozzle sprays steam downward to the fin heat exchange core, and the frost layer is melted from top to bottom, and the melted water is discharged to the cold storage through the condensate drainage pipe.

2. A steam defrost evaporator structure according to claim 1, wherein The top of the shell is provided with one or more steam nozzles.

3. A steam defrost evaporator structure according to claim 1, wherein The steam nozzle is a rotary steam nozzle.

4. A steam defrost evaporator structure according to claim 1, wherein An electromagnetic valve is further arranged between the steam pump and the steam nozzle, and the electromagnetic valve is connected to the steam nozzle through the steam delivery pipeline.

5. A steam defrost evaporator structure according to claim 4, wherein A pressure reducing valve is further arranged between the steam pump and the electromagnetic valve.

6. A steam defrost evaporator structure according to claim 1, wherein A filter is arranged between the automatic water supply device and the instant steam generator, and the water in the automatic water supply device enters the instant steam generator after being filtered by the filter.

7. A structure of a steam defrosting evaporator according to claim 1, wherein The side wall of the shell is provided with a fan opening, the fan is arranged at the fan opening, and the inner side of the fan opening is further provided with a louver.

8. A structure of a steam defrosting evaporator according to claim 1, wherein The bottom of the shell is provided with an evaporator water pan, and the evaporator water pan has a conical structure with a large upper part and a small lower part.

9. A steam defrost evaporator structure according to claim 8, wherein The bottom of the evaporator water pan is provided with a condensate drainage pipe, one end of the condensate drainage pipe communicates with the bottom of the evaporator water pan, and the other end of the condensate drainage pipe communicates with the outside through the cold storage.

10. A steam defrost evaporator structure according to claim 9, wherein The fin heat exchange core is arranged between the steam nozzle and the evaporator water pan.

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