CN204787389U - Fountain storing equipment - Google Patents

Abstract

The utility model provides a spray storage device. The spray storage equipment includes a refrigeration cycle system, a liquid cycle system, a control system, and a cabinet; the refrigeration cycle system includes a compressor, a condenser, a capillary tube, and an evaporator connected together; the liquid cycle system includes a liquid pump, a nozzle, and a storage The liquid tank, the liquid pump is connected to the nozzle through the evaporator, the nozzle extends into the inner cavity of the box, the liquid pump is connected to the liquid storage tank, and the liquid storage tank is connected to the inner cavity of the box; among them, the liquid flowing in the liquid circulation system The spraying liquid is one or more of water, ethylene glycol, glycerol, or an aqueous solution of phenol in ethanol, or an aqueous solution of soluble salts of alkali metals and alkaline earth metals. The spray liquid will be directly sprayed onto the storage in the inner cavity of the box through the nozzle, and the low-temperature spray liquid will directly exchange heat with the storage, reducing the number of starts and stops of the compressor of the spray storage equipment and realizing speed cold function.

Description

Spray storage equipment

technical field

The utility model relates to a refrigeration device, in particular to a spray type storage device.

Background technique

At present, the cooling capacity transfer process of refrigeration equipment (the heat transfer process is opposite): the refrigerant in the evaporator evaporates and absorbs heat, and the generated cooling capacity reduces the temperature of the inner tank of the refrigeration equipment close to the evaporator through "heat conduction". The inner tank of the low-temperature refrigeration equipment cools down the closed gas inside the refrigeration equipment through natural convection and radiation (if there is a forced convection device inside, the heat exchange method is forced convection), and the low-temperature gas passes through natural convection (if there is a forced convection device inside). For forced convection) to exchange heat with the storage to take away the heat of the storage. The inner wall of the refrigeration equipment and the storage also take away the heat of the storage through radiation heat exchange.

There are two main problems in the above-mentioned cold transfer process: one is that the interior of the refrigeration equipment uses air as the main heat exchange medium. m ° C)) is low, resulting in low heat transfer coefficient; the second is natural convection and radiation heat transfer (within the temperature difference between the inner wall of the refrigeration equipment and the storage), the two heat transfer methods themselves have a low heat transfer coefficient, which is between 10 and 100W /(m2·℃) range. On the one hand, according to the basic formula of heat transfer = heat transfer coefficient × heat transfer temperature difference × heat transfer area, when the refrigeration equipment has a lot of storage, it needs a higher heat transfer heat, and the refrigeration equipment generally reduces the evaporation temperature ( That is, increase the heat transfer temperature difference), and according to Carnot's theorem of thermodynamics, the lower the evaporation temperature of the refrigeration equipment, the lower the cooling coefficient of performance (COP), and the slower the cooling speed; The temperature bulb is placed on the pipeline of the refrigeration system (usually placed at the outlet of the evaporator pipeline), and the temperature at the outlet of the evaporator can be used to judge whether the air temperature in the refrigerating room has dropped to the set value. When the lower limit of the temperature is set, the compressor will stop, and the compressor will not restart until the air temperature inside the refrigeration equipment rises to the upper temperature limit set by the thermostat. Because there is a large temperature difference between the air temperature and the storage temperature, when the compressor stops, the storage temperature does not drop to the set temperature, so the storage heat quickly heats the air inside the refrigeration equipment, and the temperature rises until the compressor restarts. Start work, directly lead to frequent start and stop of the compressor. The slow cooling speed makes the energy-saving performance of the freezer urgently need to be improved, and the frequent start and stop of the compressor reduces the working reliability of the freezer and greatly shortens the service life of the compressor.

At present, the water refrigeration equipment that uses water instead of air as the heat exchange refrigerant, through the forced convection heat exchange between water and storage, the heat transfer coefficient ranges from 1000 to 10000W/(m2·℃), which increases the cooling capacity of refrigeration equipment to a certain extent. However, there must be a large amount of water inside the water refrigeration equipment. The height of the water level determines the utilization of the volume of the refrigeration equipment. At the same time, the existence of a large amount of water also increases the strength of the refrigeration equipment. In addition, the evaporator of the refrigeration system is placed inside the refrigeration equipment, occupying the effective volume of the refrigeration equipment.

Contents of the invention

In view of this, the utility model provides a spray storage device, which aims to reduce the number of start-up and stop times of the compressor of the spray storage device and realize the function of rapid cooling.

The technical solution provided by the utility model is a spray storage device, including: a refrigeration cycle system, a liquid cycle system, a control system and a box body; the refrigeration cycle system includes a compressor, a condenser, capillary and evaporator; the liquid circulation system includes a liquid pump, a nozzle and a liquid storage tank, the liquid pump is connected to the nozzle through the evaporator, and the nozzle extends into the inner cavity of the box, so The liquid pump is connected to the liquid storage tank, and the liquid storage tank is connected to the inner cavity of the box body; wherein, the spray liquid flowing in the liquid circulation system is water, ethylene glycol, glycerol One or more of them, or ethanol aqueous solution of phenol, or aqueous solution of soluble salts of alkali metals and alkaline earth metals.

Further, the refrigerating cycle system also includes a four-way valve and a switch, the common inlet and the common outlet of the four-way reversing valve are respectively connected with the discharge pipe and the suction pipe of the compressor, and the four-way The other two ports of the reversing valve are respectively connected with the condenser and the evaporator, and the capillary is arranged between the condenser and the evaporator; the switch is used to trigger and control the four-way Reversing valve reversing.

Further, the switch is a manual switch, and the evaporator and the condenser switch the four-way reversing valve through the manual switch to change the flow direction of the refrigerant.

Further, a regulating valve and a filter are sequentially arranged between the liquid storage tank and the liquid pump.

Further, it also includes a control system, the control system includes a temperature controller, a temperature sensor, a pressure difference sensor and a position switch, and the temperature sensor is arranged between the liquid storage tank and the liquid collection port at the bottom of the tank , the thermostat is connected to the temperature sensor, the liquid pump, and the compressor respectively, the differential pressure sensor is arranged between the inlet and outlet of the liquid pump, and the differential pressure sensor is connected to For the compressor, the position switch is arranged at the door of the box.

Further, the median diameter of the spray droplets of the nozzle is 0.5-5.5 mm.

The spray storage equipment provided by the utility model cools the spray liquid in the liquid circulation system through the refrigeration cycle system, and the spray liquid will be directly sprayed onto the storage in the inner cavity of the box through the spray head, and the low-temperature spray The spray liquid will directly exchange heat with the storage, and due to the replacement of the heat transfer coefficient of the liquid, the spray liquid on the storage can quickly exchange heat with the storage, which improves the performance coefficient of the refrigeration equipment and improves the energy utilization efficiency. The function of rapid cooling is realized; at the same time, due to the faster cooling speed, the number of start and stop of the compressor is also significantly reduced, prolonging the service life of the spray storage equipment.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the appended drawings in the following description The drawings are some embodiments of the utility model, and those skilled in the art can also obtain other drawings according to these drawings on the premise of not paying creative labor.

Fig. 1 is the schematic diagram of Embodiment 1 of the utility model spray type storage device;

Fig. 2 is a schematic diagram of Embodiment 2 of the spray storage device of the present invention.

Detailed ways

In order to make the purpose, technical solutions and advantages of the embodiments of the utility model more clear, the technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the utility model. Obviously, the described The embodiments are some embodiments of the present utility model, but not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

Embodiment one

As shown in Figure 1, the spray storage device of this embodiment mainly includes a compressor 1, a condenser 3, a capillary 4, an evaporator 5, a liquid pump 6, a nozzle 7, a liquid storage tank 8, a regulating valve 9, a filter Device 10, thermostat 11, temperature sensor 12, differential pressure sensor 13, position switch 14 and box 15. Among them, compressor 1, condenser 3, capillary tube 4 and evaporator 5 form a refrigeration cycle system; liquid pump 6, filter 10, nozzle 7, liquid storage tank 8 and regulating valve 9 form a liquid cycle system; temperature controller 11, The temperature sensor 12, the differential pressure sensor 13 and the position switch 14 form a control system.

The structure of the refrigeration cycle system is specifically: the compressor 1 , the condenser 3 , the capillary tube 4 and the evaporator 5 are sequentially connected together in a cycle to form a refrigeration circuit for the refrigerant to flow.

The structure of the liquid circulation system is as follows: the spray liquid output by the liquid pump 6 is cooled by the evaporator 5 and then sent to the nozzle 7, the nozzle 7 extends into the inner cavity of the box body 15, and the liquid pump 6 passes through the filter 10 and the regulating valve 9 in turn. It is connected with the liquid storage tank 8 , and the liquid storage tank 8 is connected to the inner cavity of the box body 15 . Wherein, the bottom of the inner cavity of the box body 15 can be formed with a liquid collecting port (not shown), and the liquid storage tank 8 is connected to the drain hole to collect the spray liquid in the box body 15; in addition, the evaporator 15 can adopt plate heat exchange There are two flow paths in the evaporator 15, one of which is for refrigerant flow, and the other flow path is for spray liquid flow, and the liquid pump 6 is connected to the nozzle 7 through the evaporator 5 , or, the liquid pump 6 and the nozzle 7 are directly connected through a pipeline, and the pipeline is attached to the evaporator 5 to cool the spray liquid flowing through the pipeline through the evaporator 5 .

The structure of the control system is specifically: the temperature sensor 12 is located between the liquid storage tank 8 and the liquid collection port at the bottom of the box body 15, the temperature controller 11 is connected to the temperature sensor 12, the liquid pump 6, and the compressor 1 respectively, and the differential pressure sensor 13 is arranged between the inlet and outlet of the liquid pump 6, the differential pressure sensor 13 is also connected to the compressor 1, and the position switch 14 is arranged at the door body of the box body 15 for judging the door body on the box body 15 (not shown). display) whether to open.

The working process and control method of the spray storage device in this embodiment will be described below in conjunction with the accompanying drawings, taking beverages refrigerated in the box body 15 as an example.

The working state of the spray storage device in this embodiment is mainly divided into four working conditions: start-up, operation, stop and door opening. 7. The particle size of the spray droplet is medium to medium, and the particle size of the median spray droplet is 1-3mm. Close the door, set the temperature value of the thermostat 11 to 10°C, and turn on the power. The spray type storage equipment of the embodiment enters the start-up working condition stage.

The refrigeration cycle system exchanges heat with the spray liquid in the liquid cycle system through the evaporator 5, and the liquid cycle system sprays the cooled spray liquid onto the storage through the nozzle 7 for heat exchange; the control system simultaneously controls the refrigeration cycle system and the liquid Circulation system; the liquid circulation system controls the refrigeration circulation system at the same time, and the steps of the refrigeration circulation system are as follows:

First, according to the position switch 14 of the cold door body, it is judged whether the door body is open (closed at this time); then the temperature signal transmitted by the temperature sensor 12 to the thermostat 11 is normal temperature (because the beverage has just been put in), which deviates from the set temperature value , the thermostat 11 then controls the liquid pump 6 to be powered on, the liquid circulation system starts to work, and the compressor 1 is powered on at the same time;

But after the compressor 1 is powered on, whether the compressor 1 starts is also controlled by the differential pressure sensor 13, and it is judged by the differential pressure sensor 13 whether the inlet and outlet of the liquid pump 6 have successfully established a differential pressure. If the differential pressure has been successfully established, then The liquid circulation system works normally, the compressor 1 starts, and the refrigeration circulation system starts to work.

The transfer process of cooling capacity is: the refrigerant in the evaporator 5 of the refrigeration cycle system evaporates and absorbs heat to generate cooling capacity, and the liquid circulation system (taking water as an example, the spray liquid is pure water, ethylene glycol, glycerin, etc.) One or several kinds of ethanol aqueous solution of phenol or aqueous solution of alkali metal and alkaline earth metal soluble salt (such as sodium chloride, calcium chloride), select the applicable spray liquid according to the refrigeration and freezing temperature of the storage) water by The liquid pump 6 is pumped to the evaporator 5 for refrigeration, and the cooling capacity absorbed by the refrigerant becomes cold water, and the cold water is atomized into high-speed small droplets through the nozzle 7, and the small droplets are directly sprayed on the surface of the beverage packaging, exchanging heat with the beverage, and at the same time Due to the high flow velocity of the small droplets, hitting the beverage will cause the beverage to vibrate, so that the cold energy can be quickly transferred from the beverage packaging to the inside of the beverage, and at the same time reduce the temperature difference between the periphery and the inside of the beverage, so that the beverage can be fully cooled; after exchanging heat with the beverage The temperature of the final liquid droplets rises and collects at the bottom of the box body 15, and is discharged into the liquid storage tank 8 of the liquid circulation system from the liquid collection port by gravity, and then is pumped into the liquid pump 6 through the regulating valve 9 and the filter 10 in turn. Evaporator 5, enter the next round of circulation.

When water enters the liquid storage tank 8 from the liquid collection port of the tank body 15 , it will flow through the temperature sensor 12 and transmit the temperature signal of the water to the temperature controller 11 . Due to the continuous transfer of cold energy, the temperature of the beverage is gradually reduced, and the temperature of the return water is also gradually reduced. When the temperature reaches the set 10° C., the thermostat 11 cuts off the power supply of the liquid pump 6 and the compressor 1 at the same time, and the liquid circulation system and the refrigeration circulation system stop working at the same time, and enter into a shutdown condition. Due to the continuous introduction of external heat, the temperature of the internal beverage gradually rises. When the upper limit of the thermostat 11 is reached, the spray storage device is restarted.

When the spray storage equipment is in normal operation, if the door is opened halfway, in order to prevent the liquid ejected from the nozzle 7 from flying out of the box 15, the position switch 14 controls the liquid pump 6 and the compressor 1 to be powered off at the same time, and the liquid circulation system and The refrigeration circulation system is cut off at the same time, and the spray storage equipment stops working. After the door body is closed, the liquid pump 6 and the compressor 1 are restarted.

The analysis found that the weakest link between the cooling capacity and the storage heat exchange is inside the spray storage equipment, so the utility model introduces the spray heat exchange technology with a heat transfer coefficient of 100000W/(m2) into the spray storage equipment. At the same time, according to the basic laws of fluid mechanics and heat transfer, it is proposed that the spray mode can be adjusted and the particle size of spray droplets is determined by the type of storage inside the box 15. As far as the refrigeration function is concerned, this In addition to selling refrigerated soft bottle beverages, the utility model spray storage equipment can also realize quick freezing of fruits or packaged foods.

For example:

For bottled beverages, choose a spray droplet size close to columnar to spray the liquid onto the storage surface, while for glass and metal bottled beverages, choose a larger spray droplet size (the median size of the droplet diameter of 2-5.5mm), followed by plastic bottled liquid beverages (the median diameter of the droplet ranges from 1-3mm), and smaller spray droplet diameters for fruits (the median diameter of the droplets The range is 0.5-2mm). This is because the larger droplet size has relatively higher kinetic energy, which can vibrate the beverage bottle and the internal liquid. While strengthening the external heat transfer of the storage, it also strengthens the internal heat transfer, and further realizes the rapid cooling of the refrigeration equipment. / Quick heat function.

For storage such as fruits, because the surface is fragile and the internal heat transfer is the bottleneck of the entire heat transfer, excessively strengthening the external heat transfer will not contribute much to the overall, so it only needs to provide a uniform low temperature environment, so choose close to Atomized spray droplet size.

The improvement of the internal heat transfer coefficient of the box body 15 increases the heat transfer coefficient from the refrigerant to the storage, and the temperature difference required to transfer the same amount of heat will be reduced. Using the technical solution of the utility model for refrigeration, the evaporation temperature of the refrigeration cycle system The temperature difference with the temperature sensing bulb of the thermostat 11 is ≤5°C, and the temperature difference with the target temperature of the storage is ≤10°C, which greatly optimizes the performance of the refrigeration cycle system.

There are two fundamental reasons for the frequent start and stop of compressors in traditional refrigeration equipment under heavy load: one is the position of the temperature sensor of the thermostat; the other is that there is a large temperature difference between the evaporation temperature and the storage. Among them, as mentioned above, the introduction of the spray technology reduces the temperature difference between the evaporation temperature and the storage. between 8 tanks. On the premise that 80 bottles of 500ml bottled water are loaded into the 128L refrigeration equipment, through experimental comparison, within 24 hours, the traditional refrigeration equipment starts and stops 100 times, while the quick cooling energy-saving cabinet of the utility model only starts and stops twice.

Embodiment two

In addition, as shown in Figure 2, in addition to realizing the above-mentioned rapid cooling function, the spray storage device in this embodiment is based on the first embodiment above, and the difference is that it can also heat the storage in the box body 15, specifically, the The refrigeration cycle system also includes a four-way reversing valve 2 and a changeover switch (not shown); the structure of the refrigeration cycle system is specifically: the common inlet and common outlet of the four-way reversing valve 2 are connected to the exhaust pipe of the compressor 1 and the common outlet respectively. The suction pipe is connected, the other two ports of the four-way reversing valve 2 are respectively connected with the condenser 3 and the evaporator 5, and the capillary tube 4 is arranged between the condenser 3 and the evaporator 5; Connect to valve 2.

Specifically, when it is necessary to switch from the cooling state to the heating state, pull the switch, control the power supply to give a high-level pulse to the four-way reversing valve 2, and realize the reversing of the four-way reversing valve 2, and the flow of refrigerant The direction is changed, the functions of the evaporator 5 and the condenser 3 are interchanged, and the rapid heating function is realized in turn, which can make the spray storage device of this embodiment serve as a "hot drink" heater in winter or other occasions where it is needed, which improves the energy consumption. Utilization efficiency reduces the idle rate, and fully utilizes the frequency of use of the shower type storage device in this embodiment, making it a multi-functional electrical appliance for all seasons.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present utility model, and are not intended to limit it; although the utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: It is still possible to modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit of the technical solutions of the various embodiments of the present invention. and range.

Claims (6)

1. a fountain storing equipment, is characterized in that, comprising: cooling cycle system, fluid circulation system, control system and casing; Described cooling cycle system comprises the compressor, condenser, capillary and the evaporimeter that link together; Described fluid circulation system comprises liquor pump, nozzle and fluid reservoir, described liquor pump is connected with described nozzle through described evaporimeter, described nozzle stretches into the inner chamber of described casing, and described liquor pump is connected with described fluid reservoir, and described fluid reservoir is connected to the inner chamber of described casing; Wherein, the ejecting liquid flowed in described fluid circulation system is the aqueous solution of one or more or the ethanol water of phenol or the soluble-salt of alkali and alkaline earth metal ions in water, ethylene glycol, glycerine.

2. fountain storing equipment according to claim 1, it is characterized in that, described cooling cycle system also comprises cross valve and change-over switch, the public entrance of described four-way change-over valve and public outlet are connected with the blast pipe of described compressor and air intake duct respectively, other two reduction of fractions to a common denominators of described four-way change-over valve are not connected with described evaporimeter with described condenser, and described capillary is located between described condenser and described evaporimeter; Described change-over switch is used for four-way change-over valve commutation described in trigging control.

3. fountain storing equipment according to claim 2, is characterized in that, described change-over switch is MTS, and described evaporimeter and described condenser switch by described MTS the flow direction that described four-way change-over valve changes cold-producing medium.

4. fountain storing equipment according to claim 1, is characterized in that, be also disposed with control valve and filter between described fluid reservoir and described liquor pump.

5. fountain storing equipment according to claim 4, it is characterized in that, also comprise control system, described control system comprises temperature controller, temperature sensor, differential pressure pickup and position switch, described temperature sensor is located between the liquid collection opening of described fluid reservoir and described bottom half, described temperature controller and described temperature sensor, described liquor pump, described compressor is connected respectively, entering of described liquor pump be located at by described differential pressure pickup, between outlet, described differential pressure pickup is connected to described compressor, described position switch is located at the door body place of described casing.

6. fountain storing equipment according to claim 1, is characterized in that, the median particle diameter of the spray droplet of described nozzle is 0.5-5.5mm.