CN117366979A - Refrigerating equipment and defrosting method thereof - Google Patents

Abstract

The invention provides refrigeration equipment and a defrosting method of the refrigeration equipment, wherein the refrigeration equipment is provided with a refrigeration compartment, an evaporator compartment and an evaporator arranged in the evaporator compartment, the evaporator compartment is arranged at the bottom of the refrigeration compartment, the refrigeration equipment further comprises a refrigeration return air duct communicated with the refrigeration compartment, part of the refrigeration return air duct is arranged at the bottom of the evaporator compartment and extends from back to front to be arranged below the evaporator, and a refrigeration return air opening is formed in the refrigeration return air duct and is positioned below the front end of the evaporator. The refrigeration equipment provided by the invention has the advantages that the evaporator is arranged at the bottom, and a part of the refrigeration return air duct is arranged at the bottom of the evaporator chamber, so that the space of the refrigeration compartment is prevented from being limited due to lateral return air.

Description

Refrigerating equipment and defrosting method thereof

Technical Field

The invention relates to the technical field of refrigeration equipment, in particular to refrigeration equipment and a defrosting method of the refrigeration equipment.

Background

The refrigerator of bottom-mounted evaporator is for setting up the evaporimeter room in freezing room bottom, in current bottom-mounted evaporimeter refrigerator, and the refrigeration return air is in freezing room both sides return air after being linked together with the evaporimeter room side, and the refrigeration return air wind channel of freezing room both sides makes the space of freezing room limited, has reduced the width in the freezing room left and right directions, and the side return air makes the heat inhomogeneous, causes the return air mouth department to freeze easily, influences the cold air circulation.

Disclosure of Invention

The invention aims to provide refrigeration equipment and a defrosting method of the refrigeration equipment, wherein the refrigeration equipment is provided with an evaporator chamber at the bottom of a refrigeration compartment, and a part of refrigeration return air channel is arranged at the bottom of the evaporator chamber and extends forwards from back to back, so that the refrigeration return air is bottom return air, and the problem of space reduction of the refrigeration compartment of a refrigerator with a bottom evaporator in the prior art is solved.

In order to achieve one of the above objects, an embodiment of the present invention provides a refrigeration apparatus, which is formed with a refrigeration compartment, an evaporator and an evaporator disposed in the evaporator compartment, wherein the evaporator compartment is disposed at the bottom of the refrigeration compartment, the refrigeration apparatus further comprises a refrigeration return air duct communicating with the refrigeration compartment, a portion of the refrigeration return air duct is disposed at the bottom of the evaporator compartment and extends from back to front to below the evaporator, and the refrigeration return air duct is formed with a refrigeration return air inlet disposed below the front end of the evaporator.

As a further improvement of an embodiment of the invention, the evaporator chamber comprises a first evaporator chamber and a second evaporator chamber which are arranged in front of and behind each other and are communicated with each other, the evaporator is arranged in the first evaporator chamber, and a part of the refrigerating return air duct is arranged at the bottom of the first evaporator chamber.

As a further development of an embodiment of the invention, a compensation heating wire is arranged below the first evaporator chamber, which compensation heating wire covers the bottom of the first evaporator chamber.

As a further improvement of an embodiment of the present invention, a water receiving tray is disposed at the bottom of the evaporator chamber, and the water receiving tray is disposed at the front end of the evaporator chamber.

As a further improvement of an embodiment of the present invention, the evaporator chamber is disposed obliquely downward from back to front in the front-rear direction of the refrigeration apparatus so that the defrost water flows into a water receiving tray located at the front end of the evaporator chamber.

As a further improvement of an embodiment of the present invention, the refrigerator further comprises an air supply duct communicated with the rear end of the second evaporator chamber, wherein the air supply duct is communicated with the freezing chamber and the refrigerating chamber and supplies cold for the freezing chamber and the refrigerating chamber.

As a further improvement of an embodiment of the invention, the evaporator further comprises a fan assembly arranged in the second evaporator chamber, wherein the fan assembly comprises an evaporation fan and a volute, and the volute comprises an air inlet end and an air outlet end;

an air supply port is formed in the rear end of the evaporator chamber, the evaporator chamber is communicated with the air supply duct through the air supply port, and the air outlet end of the volute is overlapped with the air supply port.

As a further improvement of an embodiment of the present invention, a refrigerating air return port is formed at the front end of the evaporator chamber, and a refrigerating air outlet communicated with the refrigerating chamber are formed in the air supply duct, so that air circulation between the refrigerating chamber and the evaporator chamber and air circulation between the refrigerating chamber and the evaporator chamber are realized.

As a further improvement of an embodiment of the invention, the inclination angle of the second evaporator chamber is larger than the inclination angle of the first evaporator chamber.

As a further improvement of one embodiment of the present invention, the refrigerating return air duct is communicated with the evaporator chamber through the refrigerating return air inlet, and then extends to the side of the freezing chamber to be communicated with the refrigerating chamber.

An embodiment of the present invention further provides a defrosting method of a refrigeration device, where the refrigeration device is a refrigeration device as described above, and the refrigeration device further includes a defrosting heating wire disposed beside the evaporator, and the defrosting method includes the following steps:

acquiring a defrosting instruction;

controlling the defrosting heating wire and the compensation heating wire to work;

acquiring the temperature of the evaporator, comparing the temperature of the evaporator with the preset temperature of the evaporator, and controlling the defrosting heating wire and the compensation heating wire to stop working if the temperature of the evaporator is more than or equal to the preset temperature of the evaporator;

the conditions for issuing the defrosting instruction are as follows: the accumulated working time of the compressor is more than or equal to the preset working time of the compressor, or the accumulated opening time of the door body is more than or equal to the preset opening time of the door body.

As a further improvement of an embodiment of the invention, the preset temperature of the evaporator is 8 ℃, the preset working time of the compressor is 8 hours, and the preset opening time of the door body is 15 minutes.

The one or more technical schemes provided by the invention have at least the following technical effects or advantages:

the refrigerating equipment provided by the invention has the advantages that the evaporator chamber provided with the evaporator is arranged at the bottom of the freezing chamber, the bottom of the refrigerating return air duct is arranged at the bottom of the evaporator chamber and extends forwards from back to front, and the condition that the left and right spaces of the freezing chamber are reduced due to side return air is avoided. Simultaneously, the partial refrigeration return air duct arranged below the evaporator at the bottom enables hot air in the refrigeration compartment not to be in direct contact with cold air in the evaporator chamber, but gradually cools under the action of the evaporator through the partial refrigeration return air duct, so that the temperature of the hot air is reduced, the hot air is prevented from being condensed into water beads when encountering cold, and then the hot air is gradually frozen at the low temperature of the evaporator chamber.

Drawings

Fig. 1 is a schematic view of a refrigeration apparatus according to an embodiment of the present invention with a casing removed.

Fig. 2 is a front view of the structure of fig. 1.

Fig. 3 is a schematic cross-sectional view taken along line A-A in fig. 2.

Fig. 4 is an enlarged view at B in fig. 3.

Fig. 5 is a flowchart of a defrosting method of a refrigeration appliance according to an embodiment of the present invention.

10. Freezing the compartment; 20. a refrigerating compartment;

1. an evaporator chamber; 11. a first evaporator chamber; 111. freezing an air return port; 12. a second evaporator chamber; 121. an air supply port; 2. refrigerating return air duct; 21. the first refrigerating return air duct; 211. refrigerating the air return port; 22. the second refrigerating return air duct; 3. an evaporator; 4. a volute; 5. compensating a heating wire; 6. a water receiving tray; 7. an air supply duct; 71. freezing an air outlet; 72. and (5) refrigerating an air outlet.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

Terms such as "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like as used herein to refer to a spatially relative position are used for ease of illustration to describe one element or feature's relationship to another element or feature as illustrated in the figures. The term spatially relative position may be intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures.

For example, if the device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" the other elements or features. Thus, the exemplary term "below" can encompass both an orientation of above and below. The device may be otherwise oriented (rotated 90 degrees or other orientations) and the spatially relative descriptors used herein interpreted accordingly.

In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; 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 terms in this application will be understood by those of ordinary skill in the art in a specific context.

Also, it should be understood that, although the terms first, second, etc. may be used herein to describe various elements or structures, these described objects should not be limited by these terms. These terms are only used to distinguish one such descriptive object from another. For example, the first refrigerated return air duct may be referred to as a second refrigerated return air duct, and similarly the second refrigerated return air duct may also be referred to as a first refrigerated return air duct, without departing from the scope of the present application.

The embodiment of the invention provides a refrigeration device, as shown in fig. 1-4, which is provided with a freezing compartment 10, a refrigerating compartment 20, an evaporator 1 and an evaporator 3 arranged in the evaporator 1, wherein the evaporator 1 is arranged at the bottom of the freezing compartment 10, the refrigeration device also comprises a refrigerating return air duct 2 communicated with the refrigerating compartment 20, a part of the refrigerating return air duct 2 is arranged at the bottom of the evaporator 1 and extends from back to front to be arranged below the evaporator 3, the refrigerating return air duct 2 is provided with a refrigerating return air port 211, and the refrigerating return air port 211 is arranged below the front end of the evaporator 3. In this embodiment, in order to facilitate the observation of the cooperation between each air duct and each compartment, the outer casing of the refrigerating compartment is removed, and only the inner liners and each air duct forming the refrigerating compartment 10 and the refrigerating compartment 20 are shown.

In this embodiment, for convenience of distinction, the refrigeration return air duct 2 is divided into a first refrigeration return air duct 21 and a second refrigeration return air duct 22, wherein a part of the refrigeration return air duct 2 disposed in the evaporator chamber 1 is the first refrigeration return air duct 21, and a part of the refrigeration return air duct 2 disposed outside the evaporator chamber 1 is the second refrigeration return air duct 22.

The evaporator chamber 1 is disposed at the bottom of the freezing compartment 10 instead of at the rear side of the refrigerating compartment 20, increasing the capacity in the front-rear direction of the refrigerating apparatus; the first refrigeration return air duct 21 is arranged at the bottom of the evaporator chamber 1 from front to back, so that the connection of the refrigeration return air duct 2 with the two sides of the evaporator chamber 1 is avoided, the refrigeration return air duct 2 is not required to be arranged on the two sides of the refrigeration compartment 10, and the capacity of the refrigeration compartment 10 is increased in the left-right direction of the refrigeration equipment.

In addition, since the first refrigerating return air duct 21 is disposed at the bottom of the evaporator chamber 1 from the back to the front and is located below the evaporator 3, relatively hot air flowing out of the refrigerating compartment 20 flows into the second refrigerating return air duct 22 after flowing through the first refrigerating return air duct 21, and when hot air flows in the second refrigerating return air duct 22, the temperature of the hot air gradually decreases, and then the refrigerating return air inlet 211 at the front end of the second refrigerating return air duct 22 meets with cold air in the evaporator chamber 1 after the hot air is cooled by the evaporator 3, so that the temperature difference of the cold and hot air is reduced, and water vapor in the hot air is prevented from condensing into water drops after the hot air is precooled, and the water drops are prevented from being solidified into frost at a low temperature for a long time to block the return air inlet.

Specifically, the evaporator chamber 1 of the refrigeration equipment provided by the embodiment of the invention comprises a first evaporator chamber 11 and a second evaporator chamber 12 which are arranged in a front-back mode and are communicated with each other, the evaporator 3 is arranged in the first evaporator chamber 11, and the refrigeration equipment further comprises a fan assembly arranged in the second evaporator chamber 12.

Further, a compensation heating wire 5 is arranged below the first evaporator chamber 11, the compensation heating wire 5 covers the bottom of the first evaporator chamber 11, or the compensation heating wire 5 is arranged below the freezing chamber 10 and is closely attached to the bottom wall of the freezing chamber 10. After the evaporator 3 works and cools for a long time, if frost still forms at the refrigerating air return port 211, the compensation heating wire 5 can be turned on to heat, so that the frost is melted.

Further, a water receiving tray 6 with a drain pipe connected to the bottom is arranged at the bottom of the evaporator chamber 1, the water receiving tray 6 is arranged at the front end of the evaporator chamber 1, and is specifically arranged below a hot air outlet of the refrigeration air return opening 211, so that the melted frost formed at the refrigeration air return opening 211 flows into the water receiving tray 6 and is discharged out of the evaporator chamber 1 through the drain pipe.

Further, in the front-rear direction of the cooling time, the evaporator chamber 1 is disposed obliquely downward from the rear to the front as a whole, and the inclination angle of the second evaporator chamber 12 is much larger than that of the first evaporator chamber 11. On the one hand, the second evaporator chamber 12 is disposed obliquely downward so that the lower end of the second evaporator chamber 12 forms a space for placing the compressor; on the other hand, the first evaporator chamber 11 is inclined, and since the water receiving tray 6 is disposed at the front end of the evaporator chamber 1, no matter whether the frost is formed at the refrigerating return air port 211 or the frost is formed at the bottom of the first evaporator chamber 11, after defrosting the compensation heater wire 5, the inclined first evaporator chamber 11 can enable the defrosting water to flow forward, finally flow into the water receiving tray 6, and then be discharged through the drain pipe.

Further, the refrigerating apparatus further comprises an air supply duct 7 communicated with the freezing compartment 10, the refrigerating compartment 20 and the evaporator compartment 1, the air supply duct 7 is communicated with the rear end of the second evaporator compartment 12, and cold air cooled by the evaporator 3 in the first evaporator compartment 11 is transmitted into the freezing compartment 10 and the refrigerating compartment 20 under the action of the fan assembly.

Specifically, the fan assembly comprises an evaporation fan and a volute 4 sleeved on the evaporation fan, as shown in fig. 4, only the volute 4 is shown in fig. 4, the evaporation fan is not shown, and the volute 4 comprises an air inlet end and an air outlet end; the rear end of the second evaporator chamber 12 is provided with an air supply opening 121, the evaporator chamber 1 is communicated with the air supply duct 7 through the air supply opening 121, and the air outlet end of the volute 4 is overlapped with the air supply opening 121. In addition, a refrigerating return air port 111 is formed at the front end of the first evaporator chamber 11, a refrigerating air outlet 71 communicating with the refrigerating compartment 10 and a refrigerating air outlet 72 communicating with the refrigerating compartment 20 are formed in the air supply duct 7, the refrigerating air outlet 71 is provided at the middle position of the rear side of the refrigerating compartment 10, and the refrigerating air outlets 72 are provided at both sides of the rear side of the refrigerating compartment 20.

The cold air in the freezing compartment 10 enters the evaporator compartment 1 from the freezing return air inlet 111 at the front end of the evaporator compartment 1, the air in the refrigerating compartment 20 passes through the second refrigerating return air channel, is precooled by the evaporator 3 in the first refrigerating return air channel 21, enters the evaporator compartment 1 from the refrigerating return air inlet 211, is converged with the return air of the freezing compartment 10, flows into the second evaporator compartment 12 after flowing through the evaporator 3 for refrigeration under the action of the evaporating fan, enters the volute 4 from the air inlet end of the volute 4, enters the air supply channel from the air outlet 121 of the volute 4, and enters the freezing compartment 10 and the refrigerating compartment 20 after flowing through the freezing air outlet 71 and the refrigerating air outlet 72 respectively, so that the air circulation of the freezing compartment 10, the evaporator compartment 1, the refrigerating compartment 20 and the evaporator compartment 1 is realized.

Further, the refrigerating compartment 20 is disposed above, the freezing compartment 10 is disposed below, and the evaporator chamber 1 is disposed at the bottom wall of the freezing compartment 10, so that the first refrigerating return air duct 21 and the second refrigerating return air duct 22 are communicated with each other at the rear end of the first evaporator chamber 11, and the second refrigerating return air duct 22 extends sideways of the freezing compartment 10 and then extends upwards to be communicated with the refrigerating compartment 20. Because the temperature of the freezing compartment 10 is lower, the heat insulation layer outside the freezing compartment 10 is thicker, and the second refrigerating return air split air duct is arranged in the heat insulation layer beside the freezing compartment 10, the transverse capacity of the freezing compartment 10 is not reduced.

The embodiment of the invention also provides a defrosting method of the refrigeration equipment, wherein the refrigeration equipment is the refrigeration equipment, and in addition, the refrigeration equipment also comprises a defrosting heating wire arranged at the side of the evaporator 3, and the defrosting method comprises the following steps:

acquiring a defrosting instruction;

controlling the defrosting heating wire and the compensation heating wire 5 to work;

acquiring the temperature of the evaporator 3, comparing the temperature of the evaporator 3 with the preset temperature of the evaporator 3, and controlling the defrosting heating wire and the compensation heating wire 5 to stop working if the temperature of the evaporator 3 is more than or equal to the preset temperature of the evaporator 3;

the conditions for issuing the defrosting instruction are as follows: the accumulated working time of the compressor is more than or equal to the preset working time of the compressor, or the accumulated opening time of the door body is more than or equal to the preset opening time of the door body.

When the accumulated operation of the compressor exceeds a certain period, that is, the accumulated period, the compressor is operated, the evaporator 3 is refrigerating, the refrigerating time is too long, the evaporator 3 is easy to freeze, and the refrigerating return air port 211 is frozen, so that the defrosting heating wire and the compensating heating wire 5 are required to be turned on for defrosting. Similarly, if the door is opened too long, the temperature of the cooling compartment will be increased after the external hot air enters the cooling compartment, so that the compressor is required to work, and the evaporator 3 is required to cool, that is, the door is opened to increase the working time of the compressor, so that when the accumulated opening time of the door exceeds a certain value, the defrosting heating wire and the compensating heating wire 5 are required to defrost.

After the defrosting heating wire and the compensation heating wire 5 are opened, the temperature of the evaporator 3 is detected, when the temperature of the evaporator 3 is larger than or equal to the preset temperature of the evaporator 3, the frosting on the evaporator 3 is considered to be completely melted, the defrosting of the evaporator 3 can be stopped, the temperature of the evaporator 3 is very low, the evaporator 3 is easiest to freeze, the icing amount is maximum, when the frost of the evaporator 3 is melted, the ice at other positions is melted, and therefore, when the defrosting heating wire stops working, the compensation heating wire 5 can stop working.

Preferably, the preset temperature of the evaporator 3 is 8 ℃, the preset working time of the compressor is 8 hours, and the preset opening time of the door body is 15 minutes.

It should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is for clarity only, and that the skilled artisan should recognize that the embodiments may be combined as appropriate to form other embodiments that will be understood by those skilled in the art.

The above list of detailed descriptions is only specific to practical embodiments of the present invention, and they are not intended to limit the scope of the present invention, and all equivalent embodiments or modifications that do not depart from the spirit of the present invention should be included in the scope of the present invention.

Claims (12)

1. The utility model provides a refrigeration plant, is formed with freezing room, cold-stored room, evaporimeter room and set up in evaporimeter in the evaporimeter room, the evaporimeter room set up in freezing room bottom, its characterized in that, refrigeration plant still include with the cold-stored return air wind channel of cold-stored room intercommunication, part cold-stored return air channel set up in the evaporimeter room bottom, and from the back forward extension set up in the evaporimeter below, cold-stored return air channel is formed with the cold-stored return air inlet, the cold-stored return air inlet is located the below of evaporimeter front end.

2. The refrigeration unit as recited in claim 1 wherein said evaporator chamber includes a first evaporator chamber and a second evaporator chamber disposed in tandem and in communication with each other, said evaporator being disposed within said first evaporator chamber, and a portion of a refrigerated return air duct being disposed at a bottom of said first evaporator chamber.

3. A refrigeration unit as recited in claim 2 wherein a compensating heater wire is disposed below said first evaporator chamber, said compensating heater wire covering the bottom of said first evaporator chamber.

4. A refrigeration unit as recited in claim 3 wherein said evaporator chamber bottom is provided with a water pan disposed at a front end of said evaporator chamber.

5. The refrigeration unit as recited in claim 4 wherein said evaporator chamber is disposed obliquely downward from back to front in a front-to-back direction of said refrigeration unit so that defrost water flows into a drip tray located at a front end of said evaporator chamber.

6. The refrigeration appliance according to claim 2 further comprising a supply air duct in communication with the rear end of the second evaporator chamber, the supply air duct being in communication with and providing cooling to the freezer compartment and the refrigerator compartment.

7. The refrigeration appliance according to claim 6 further comprising a fan assembly disposed within said second evaporator chamber, said fan assembly including an evaporating fan and a volute, said volute including an air inlet end and an air outlet end;

an air supply port is formed in the rear end of the evaporator chamber, the evaporator chamber is communicated with the air supply duct through the air supply port, and the air outlet end of the volute is overlapped with the air supply port.

8. The refrigeration apparatus according to claim 6, wherein a refrigerating return air port is formed in a front end of the evaporator chamber, and the air supply duct is provided with a refrigerating air port communicated with the refrigerating chamber and a refrigerating air port communicated with the refrigerating chamber, thereby realizing air circulation between the refrigerating chamber and the evaporator chamber and air circulation between the refrigerating chamber and the evaporator chamber.

9. The refrigeration appliance of claim 5 wherein the angle of inclination of the second evaporator chamber is greater than the angle of inclination of the first evaporator chamber.

10. The refrigeration unit as recited in claim 1 wherein said refrigeration return air duct communicates with said refrigeration compartment after communicating with said evaporator compartment through said refrigeration return air opening and extends laterally of said refrigeration compartment.

11. A defrosting method of a refrigeration device, characterized in that the refrigeration device is a refrigeration device according to any one of claims 3 to 5, the refrigeration device further comprising a defrosting heating wire arranged beside the evaporator, the defrosting method comprising the steps of:

acquiring a defrosting instruction;

controlling the defrosting heating wire and the compensation heating wire to work;

acquiring the temperature of the evaporator, comparing the temperature of the evaporator with the preset temperature of the evaporator, and controlling the defrosting heating wire and the compensation heating wire to stop working if the temperature of the evaporator is more than or equal to the preset temperature of the evaporator;

the conditions for issuing the defrosting instruction are as follows: the accumulated working time of the compressor is more than or equal to the preset working time of the compressor, or the accumulated opening time of the door body is more than or equal to the preset opening time of the door body.

12. The defrosting method of a refrigeration unit as set forth in claim 11, wherein the evaporator preset temperature is 8 ℃, the compressor preset operating time is 8 hours, and the door preset opening time is 15 minutes.