CN204787392U - Refrigerating plant sprays - Google Patents

Abstract

The utility model provides a fountain refrigeration plant. The fountain refrigeration plant include: cooling cycle system, liquid circulation system, control system and box, refrigeration cycle is including the compressor, condenser, capillary and the evaporimeter that link together, liquid circulation system includes liquor pump, nozzle and liquid storage pot, and the liquor pump is connected with the nozzle through the evaporimeter, and the nozzle stretches into the inner chamber of box, and the liquor pump is connected with the liquid storage pot, and the liquid storage pot is connected to the inner chamber of box, be provided with at least one mobilizable wall in the inner chamber of box, cut off and separate into a plurality of sub - cavitys with the inner chamber. Cool off through the spray liquid of cooling cycle system in to liquid circulation system, improved refrigeration plant's coefficient of performance, improved energy utilization efficiency, realized the function of fast cold, simultaneously, because cooling speed is very fast, also makes opening of compressor stop the number of times and obviously reduce, prolonged fountain refrigeration plant's life.

Description

Spray refrigeration device

technical field

The utility model relates to a refrigeration device, in particular to a spray refrigeration 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)) 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 surface 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 heat transfer coefficient of the 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 requirements for 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 refrigeration device, which aims to reduce the number of start-up and stop times of the compressor of the spray refrigeration device, and realize the function of rapid cooling.

The technical solution provided by the utility model is a spray refrigeration device, including: a refrigeration cycle system, a liquid cycle system, a control system and a box; the refrigeration cycle system includes a compressor, a condenser, a capillary tube and a 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, the nozzle extends into the inner cavity of the box, and the liquid The pump is connected to the liquid storage tank, and the liquid storage tank is connected to the inner cavity of the box body; the control system includes a temperature controller and a temperature sensor, and the temperature controller is connected to the temperature sensor, the The liquid pump and the compressor are respectively connected, and the temperature sensor is arranged on the flow path formed by the liquid circulation system.

Further, the temperature sensor is arranged between the liquid storage tank and the liquid collecting port at the bottom of the tank, or, the temperature sensor is arranged between the liquid storage tank and the liquid pump, or, The temperature sensor is provided between the liquid pump and the nozzle.

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

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

Further, the control system also includes a differential pressure sensor and a position switch, the differential pressure sensor is arranged between the inlet and outlet of the liquid pump, the differential pressure sensor is connected to the compressor, and the position switch It is arranged at the door body of the box body.

Further, the evaporator is a plate heat exchanger or a casing heat exchanger, and the liquid pump is connected to the nozzle through the evaporator; or, the liquid pump is connected to the nozzle through a pipeline, The pipeline is thermally connected to the evaporator.

The spray refrigeration device 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 liquid It 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, improves the energy utilization efficiency, and realizes The function of quick cooling; at the same time, due to the faster cooling speed, the number of starts and stops of the compressor is significantly reduced, which prolongs the service life of the spray refrigeration device; similarly, by changing the state of the four-way reversing valve, it can also be realized The refrigeration control is switched to the heating control, which realizes the multi-function of quick cooling/quick heating, and becomes an all-season electrical appliance, reducing the cost.

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 a schematic diagram 1 of an embodiment of a spray refrigeration device of the present invention;

Fig. 2 is the second schematic diagram of the embodiment of the spray refrigeration 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.

As shown in Figure 1, the spray refrigeration equipment in this embodiment mainly includes a compressor 1, a condenser 3, a capillary tube 4, an evaporator 5, a liquid pump 6, a nozzle 7, a liquid storage tank 8, a regulating valve 9, and a filter 10 , thermostat 11, temperature sensor 12, differential pressure sensor 13, position switch 14 and box body 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 collection port (not shown), and the liquid storage tank 8 is connected to the liquid collection port to collect the spray liquid in the box body 15; in addition, the evaporator 15 can adopt a plate type replacement There are two flow paths in the evaporator 15, one of which is for the flow of the refrigerant, and the other is for the flow of the spray liquid. The liquid pump 6 passes through the evaporator 5 and the nozzle 7. Alternatively, 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 arranged on the flow path pipeline formed by the liquid circulation system, for example: the temperature sensor 12 is arranged between the liquid storage tank 8 and the liquid collection port at the bottom of the box body 15, or the temperature sensor 12 It is arranged between the liquid storage tank 8 and the liquid pump 6 , or the temperature sensor 12 is arranged between the liquid pump 6 and the nozzle 7 . The thermostat 11 is connected to the temperature sensor 12, the liquid pump 6, and the compressor 1 respectively, 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 set At the door body of the box body 15 , it is used to judge whether the door body (not shown) on the box body 15 is opened.

Wherein, the nozzle 7 in this embodiment is movably arranged in the inner cavity of the box body 1 , and the spraying direction can be adjusted by adjusting the position and attitude of the nozzle 7 during actual use. The nozzle 7 can be slidably arranged on the box 1, and/or, the nozzle 7 can be swingably arranged on the box 1, and/or, the nozzle 7 can be rotatably arranged on the box 1 on.

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

The working state of the spray refrigeration equipment in this embodiment is mainly divided into four working conditions: start-up, operation, stop and door opening. The particle size of the spray droplet is medium, and the particle size of the median spray droplet is 1-3mm. Close the door, set the temperature value of the temperature controller 11 to 10°C, and turn on the power. This embodiment The spray refrigeration equipment enters the start-up 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 internal beverage temperature gradually rises, and when the upper limit value of the thermostat 11 is reached, the spray refrigeration equipment is restarted.

When the spray refrigeration equipment is in normal operation, if the door is opened halfway, in order to prevent the liquid sprayed out of the nozzle 7 from flying out of the box 15, the position switch 14 controls the liquid pump 6 and the compressor 1 to cut off the power at the same time, the liquid circulation system and the refrigeration cycle The system was cut off at the same time, and the spray refrigeration equipment stopped 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 cooling capacity and storage heat exchange is inside the spray refrigeration equipment, so this utility model introduces the spray heat exchange technology with a heat transfer coefficient of 100000W/(m2) into the spray refrigeration equipment In the field of refrigeration, 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 the spray droplets is determined by the type of storage inside the box 15. As far as the refrigeration function is concerned, the utility model spray In addition to selling refrigerated soft bottle beverages, refrigeration 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.

As shown in Figure 2, in addition to realizing the above-mentioned rapid cooling function, the spray refrigeration equipment in this embodiment is based on the above-mentioned technical solution, and the difference is that it can also heat the storage in the box body 15. Specifically, the refrigeration cycle also includes The four-way reversing valve 2 and switch (not shown); the structure of the refrigeration cycle system is as follows: the common inlet and common outlet of the four-way reversing valve 2 are respectively connected to the exhaust pipe and the suction pipe of the compressor 1, The other two ports of the four-way reversing valve 2 are respectively connected to the condenser 3 and the evaporator 5, and the capillary tube 4 is arranged between the condenser 3 and the evaporator 5; the switching switch is connected to the four-way reversing valve 2 through the control power supply .

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, so that the spray refrigeration equipment of this embodiment can be used as a "hot drink" heater in winter or other necessary occasions, and the energy utilization efficiency is improved. , the idle rate is reduced, and the frequency of use of the spray refrigeration equipment of this embodiment is brought into full play, 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 spray refrigerating plant, 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; Described control system comprises temperature controller and temperature sensor, and described temperature controller is connected respectively with described temperature sensor, described liquor pump, described compressor, and described temperature sensor is located on the stream of described fluid circulation system formation.

2. spray refrigerating plant according to claim 1, it is characterized in that, described temperature sensor is located between the liquid collection opening of described fluid reservoir and described bottom half, or, described temperature sensor is located between described fluid reservoir and described liquor pump, or described temperature sensor is located between described liquor pump and described nozzle.

3. spray refrigerating plant according to claim 1, it is characterized in that, described cooling cycle system also comprises four-way change-over 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.

4. spray refrigerating plant according to claim 1, is characterized in that, is also disposed with control valve and filter between described fluid reservoir and described liquor pump.

5. spray refrigerating plant according to claim 1, it is characterized in that, described control system also comprises differential pressure pickup and position switch, described differential pressure pickup is located between the import and export of described liquor pump, described differential pressure pickup is connected to described compressor, and described position switch is located at the door body place of described casing.

6. spray refrigerating plant according to claim 1, is characterized in that, described evaporimeter is plate type heat exchanger or double pipe heat exchanger, and described liquor pump is connected with described nozzle by described evaporimeter; Or described liquor pump is connected by pipeline with between nozzle, described pipeline is connected with described evaporimeter heat conduction.