CN111609614B

CN111609614B - Refrigerator with double fans and control method thereof

Info

Publication number: CN111609614B
Application number: CN201910142777.4A
Authority: CN
Inventors: 苗建林; 李登强; 刘会; 李春阳
Original assignee: Haier Smart Home Co Ltd
Current assignee: Haier Smart Home Co Ltd
Priority date: 2019-02-26
Filing date: 2019-02-26
Publication date: 2021-08-24
Anticipated expiration: 2039-02-26
Also published as: CN111609614A

Abstract

The invention provides a refrigerator with double fans and a control method thereof, wherein the refrigerator comprises a box body which defines a cooling chamber and at least one storage chamber, an evaporator which is arranged in the cooling chamber, a first air blower and a second air blower, wherein the first air blower is positioned on an air flow path at the upstream of the evaporator and is configured to promote return air flow of the at least one storage chamber to enter the cooling chamber so as to be cooled by the evaporator to form cooling air flow; a second blower is located downstream of the evaporator in the airflow path and is configured to urge at least a portion of the cooling airflow through the blower airflow path into the at least one storage compartment.

Description

Refrigerator with double fans and control method thereof

Technical Field

The invention relates to the technical field of household appliances, in particular to a refrigerator with double fans and a control method thereof.

Background

In the existing refrigerator, a blower is generally used to make cooling air around an evaporator flow into a storage compartment through a blowing air path, and the return air speed is slow, so that the refrigeration speed is influenced.

Disclosure of Invention

In view of the above problems, it is an object of the present invention to provide a refrigerator and a control method thereof that overcomes or at least partially solves the above problems.

A further object of the present invention is to improve the refrigeration effect of the evaporator and to improve the defrosting efficiency of the refrigerator.

According to an aspect of the present invention, there is provided a refrigerator including:

a case defining a cooling chamber and at least one storage compartment therein;

an evaporator disposed in the cooling chamber and configured to cool an air flow entering the cooling chamber;

a first blower located upstream of the evaporator in the airflow path and configured to urge a flow of return air from the at least one storage compartment into the cooling compartment to be cooled by the evaporator to form a flow of cooled air;

a second blower located downstream of the evaporator in the airflow path and configured to cause at least a portion of the cooling air to flow through the supply airflow path into the at least one storage compartment.

Optionally, the cooling chamber is located below the evaporator and is formed with a drain port for draining defrosting water of the evaporator;

in the refrigerating process of the refrigerator, the first blower and the second blower are configured to make the air volume of the second blower smaller than that of the first blower in a controlled manner, so that the pressure around the evaporator is higher than the atmospheric pressure of the air in the environment where the refrigerator is located, and the air flow is prevented from entering the cooling chamber from the water outlet.

Optionally, the refrigerator further comprises:

the temperature sensor is configured to detect the ambient temperature of the refrigerator to obtain an ambient temperature value;

the humidity sensor is configured to detect the ambient humidity of the refrigerator to obtain an ambient humidity value;

when the environment temperature value is higher than the preset temperature value and the environment humidity value is higher than the preset humidity value in the refrigerating process of the refrigerator, the first air blower is configured to controllably increase the air volume of the first air blower, and the second air blower is configured to controllably decrease the air volume of the second air blower so as to increase the air volume difference value of the first air blower and the second air blower.

Optionally, the first blower is configured to be controlled to be turned off and the second blower is configured to be controlled to be operated for a first preset time to be turned off when the defrosting signal is received and the compressor of the refrigerator stops operating; or

When the defrosting signal is received and the compressor of the refrigerator stops running, the first air blower and the second air blower are configured to be controlled to enable the air volume of the second air blower to be larger than that of the first air blower, and the first air blower and the second air blower are operated for a second preset time to be turned off.

Optionally, the refrigerator further comprises:

and a defrosting heating device configured to be activated to melt a frost layer on the evaporator when both the first blower and the second blower are turned off.

Optionally, the case comprises:

a cooling chamber is limited at the lower part in the freezing inner container;

the storage compartment comprises a freezing chamber which is limited by the freezing inner container and is positioned above the cooling chamber;

the first blower is configured to urge a flow of return air from the freezer compartment into the cooling compartment, and the second blower is configured to urge at least a portion of the flow of cooling air toward the freezer compartment.

Optionally, a press cabin is further defined in the box body, and the press cabin is located behind the cooling chamber.

According to another aspect of the present invention, there is also provided a control method of a refrigerator, wherein the refrigerator includes a cooling chamber, at least one storage compartment, an evaporator provided in the cooling chamber and configured to cool an air flow entering the cooling chamber to form a cooling air flow, a first blower located upstream of the evaporator in an air flow path and configured to cause a return air flow of the at least one storage compartment to enter the cooling chamber, a second blower located downstream of the evaporator in the air flow path and configured to cause at least a part of the cooling air to flow into the at least one storage compartment, and a defrosting heating device for defrosting the evaporator, and the cooling chamber is located below the evaporator and formed with a drain port for discharging defrosting water of the evaporator;

the control method comprises the following steps: in the refrigerating process of the refrigerator, the air volume of the second air blower is smaller than that of the first air blower, so that the pressure around the evaporator is higher than the atmospheric pressure of the air in the environment where the refrigerator is located, and air flow is prevented from entering the cooling chamber from the water outlet.

Optionally, the control method further includes:

in the refrigerating process of the refrigerator, when the ambient temperature value of the refrigerator is greater than the preset temperature value and the ambient humidity value is greater than the preset humidity value, the air volume of the first air blower is increased, and the air volume of the second air blower is reduced, so that the air volume difference value of the first air blower and the second air blower is increased.

Optionally, the control method further includes:

when the defrosting signal is received and the compressor of the refrigerator stops running, the first air blower is turned off, and the second air blower is turned off for a first preset time; or

And when the defrosting signal is received and the compressor of the refrigerator stops running, enabling the air volume of the second air blower to be larger than that of the first air blower, and turning off the second air blower when the second air blower runs for a second preset time.

Optionally, the control method further includes:

the defrosting heating device is started when the first air blower and the second air blower are both closed so as to melt the frost layer on the evaporator.

In the refrigerator and the control method thereof, the air blowers are arranged at the upstream and the downstream of the evaporator, so that air return and air supply can be accelerated, the air flowing speed is increased, and the effect of quick refrigeration is achieved.

Furthermore, in the refrigerator and the control method thereof, the first air blower and the second air blower are respectively controlled and regulated in the refrigeration process, so that the condition that no air flow enters the cooling chamber from the water outlet in the refrigeration process of the refrigerator is ensured, and the frosting amount of the evaporator is reduced; in addition, when the defrosting signal is received, the evaporator can be pre-defrosted, and defrosting time and energy consumed during defrosting are reduced.

The above and other objects, advantages and features of the present invention will become more apparent to those skilled in the art from the following detailed description of specific embodiments thereof, taken in conjunction with the accompanying drawings.

Drawings

Some specific embodiments of the invention will be described in detail hereinafter, by way of illustration and not limitation, with reference to the accompanying drawings. The same reference numbers in the drawings identify the same or similar elements or components. Those skilled in the art will appreciate that the drawings are not necessarily drawn to scale. In the drawings:

fig. 1 is a schematic view of a refrigerator according to one embodiment of the present invention;

FIG. 2 is an enlarged view of area A of FIG. 1; and

fig. 3 is a flowchart of a control method of a refrigerator according to one embodiment of the present invention.

Detailed Description

The present embodiment first provides a refrigerator 100, and the refrigerator 100 according to the embodiment of the present invention is described below with reference to fig. 1 and 2, where orientations or positional relationships indicated by "front", "rear", "upper", "lower", and the like are orientations based on the refrigerator 100 itself as a reference, "front", "rear", are directions as indicated in fig. 1, and "lateral" refers to a direction parallel to a width direction of the refrigerator 100.

Fig. 1 is a schematic view of a refrigerator according to one embodiment of the present invention, and fig. 2 is an enlarged view of an area a of fig. 1.

As shown in fig. 1, the refrigerator 100 may generally include a cabinet including a case and a storage liner disposed inside the case, a space between the case and the storage liner is filled with a thermal insulation material (forming a foaming layer), the storage liner defines therein at least one storage compartment, the storage liner may generally include a freezing liner, a refrigerating liner, a temperature-changing liner, etc., and the storage compartment may include a refrigerating compartment 111 defined by the refrigerating liner, a temperature-changing compartment 121 defined by the temperature-changing liner, and a freezing compartment 131 defined by the freezing liner. The front side of the storage liner is also provided with a door body to open or close the storage compartment, for example, the front side of the refrigeration liner is provided with a refrigerating chamber door body 112, the front side of the variable temperature liner is provided with a variable temperature chamber door body 122, and the front side of the freezing liner is provided with a freezing chamber door body 132.

A plurality of storage boxes 1311 are disposed in the freezing chamber 131 in an up-down distribution, and as shown in fig. 1, three storage boxes 1311 are disposed in an up-down distribution.

As those skilled in the art can appreciate, the refrigerator 100 of the present embodiment may further include an evaporator 150, a blower fan, a compressor 104, a condenser (not shown), a throttling element (not shown), and the like. The evaporator 150 is located in the cooling chamber 133, and is connected to the compressor 104, the condenser, and the throttling element via refrigerant lines to form a refrigeration cycle, and is cooled when the compressor 104 is started to cool air flowing therethrough to form a cooling air flow. Wherein, the blower can be a centrifugal fan, a cross flow fan or an axial flow fan.

Specifically, in the present embodiment, the number of the air blowers is two, that is, the refrigerator 100 has two air blowers, that is, the first air blower 102 and the second air blower 103, the first air blower 102 is located upstream of the evaporator 150 on the air flow path and configured to promote the return air flow of the at least one storage compartment into the cooling compartment 133 to be cooled by the evaporator to form a cooling air flow, and the second air blower 103 is located downstream of the evaporator on the air flow path and configured to promote at least a part of the cooling air flow to flow into the at least one storage compartment through the air supply air passage 160.

The refrigerator of this embodiment all sets up the forced draught blower through the upper reaches and the low reaches at the evaporimeter, can accelerate return air and air supply, increases the air flow speed, reaches quick refrigerated effect.

Further specifically, as shown in fig. 1, the cooling chamber 133 may be defined by the lowermost space in the freezing container, that is, the cooling chamber 133 is defined below the freezing container, the freezing chamber 131 defined by the freezing container is located above the cooling chamber 133, the first blower 102 may be configured to force the return air flow of the freezing chamber 131 into the cooling chamber 133, and the second blower 103 may be configured to force at least a portion of the cooling air flow to the freezing chamber 131.

In the conventional refrigerator 100, the cooling chamber 133 is generally disposed in the rear space of the cabinet, the freezing chamber 131 is generally disposed at the lowermost portion of the cabinet, and the compressor compartment is disposed at the rear of the freezing chamber 131, and the freezing chamber 131 is inevitably formed as a special-shaped space to give way to the compressor compartment, thereby reducing the storage capacity of the freezing chamber 131 and causing the following problems. On one hand, the position of the freezing chamber 131 is low, so that a user can take and place articles in the freezing chamber 131 only by bending down or squatting down greatly, and the use of the user is inconvenient, especially for the old; on the other hand, since the depth of the freezing chamber 131 is reduced, in order to ensure the storage volume of the freezing chamber 131, the space in the height direction of the freezing chamber 131 needs to be increased, and when a user stores articles in the freezing chamber 131, the articles need to be stacked in the height direction, which is inconvenient for the user to find the articles, and the articles at the bottom of the freezing chamber 131 are easily shielded, so that the user is not easy to find the articles and forgets the articles, which causes deterioration and waste of the articles; furthermore, since the freezing chamber 131 is shaped and not a rectangular space, it is inconvenient to place some large and difficult-to-divide objects in the freezing chamber 131.

In this embodiment, the cooling chamber 133 is limited to the lower space in the freezing inner container, so that the cooling chamber 133 occupies the lower space in the box body, namely, the bottom of the cooling chamber 133 is arranged, the freezing chamber 131 is located above the cooling chamber, the freezing chamber 131 is raised, the bending degree of a user during the operation of taking and placing articles in the freezing chamber 131 is reduced, and the use experience of the user is improved. Meanwhile, the cabinet body can limit a press cabin behind the cooling chamber 133, the freezing chamber 131 does not need to give way for the press cabin, the storage volume of the freezing chamber 131 is ensured, and the freezing chamber 131 is a rectangular space, so that the goods can be stored in a flat-open manner instead of a stacked manner, the goods can be conveniently searched by a user, and the time and the energy of the user are saved; meanwhile, the storage box is convenient for storing large and difficult-to-divide articles, and the problem that pain spots of large articles cannot be stored in the freezing chamber 131 is solved.

The refrigerator 100 further includes a cover (not numbered) covering the evaporator 150, the cover having a rear side opened to define the aforementioned cooling chamber 133 with the bottom wall and the rear wall of the freezing chamber. The evaporator 150 may be disposed in the cooling chamber in a flat cubic shape as a whole, that is, the long and wide faces of the evaporator 150 are parallel to the horizontal plane, the thickness face is disposed perpendicular to the horizontal plane, and the thickness dimension is significantly smaller than the length dimension of the evaporator 150. By placing the evaporator 150 horizontally in the cooling chamber 133, the evaporator 150 is prevented from occupying more space, and the storage capacity of the freezing chamber 131 in the upper portion of the cooling chamber 133 is secured.

The press cabin is located behind the cooling chamber 133, so that the whole press cabin is located below the freezing chamber 131, and as before, the freezing chamber 131 does not need to give way for the press cabin any more, the depth of the freezing chamber 131 is ensured, and articles which are large in size and difficult to cut can be placed conveniently.

As shown in fig. 1 and 2, a front return air inlet 133a is formed at the front side of the cooling compartment 133, and a return air flow of the at least one storage compartment (e.g., the freezing compartment 131) is introduced into the cooling compartment 133 through the front return air inlet 133a, the air supply duct 160 is positioned inside the rear wall of the freezing inner container, and has a plurality of air supply outlets 160a communicated with the freezing chamber 131, the first air supply device 102 is positioned in front of the evaporator 150 and behind the front return air inlet 133a, the horizontal distance between the front end of the first air supply device 102 and the front return air inlet 133a can be more than 80mm, the user can be prevented from touching the first air supply device 102 from the front return air inlet 133a, the horizontal distance between the rear end of the first blower 102 and the front end surface of the evaporator 150 can be more than 10mm, so as to prevent the fan blades of the first blower 102 from touching the evaporator 150, and frost formation of the first blower 102 due to the first blower 102 being too close to the evaporator 150 is avoided.

Accordingly, the second blower 103 is located behind the evaporator 150, and the horizontal distance between the front end of the second blower 103 and the rear end surface of the evaporator 150 can be more than 10mm, so that the fan blade of the second blower 103 is prevented from touching the evaporator 150, and the second blower 103 is prevented from frosting due to too close distance between the second blower 103 and the evaporator 150.

The refrigerator 100 further includes a variable temperature chamber air path (not shown), which may be located outside the rear wall of the variable temperature liner and in the foaming layer, and a variable temperature damper (not shown) is disposed at a top end of the air supply air path 160 and is controllable to open or close to communicate the variable temperature chamber air path with the air supply air path 160. Lateral sides of the cooling compartment 133 are formed with side return air inlets (not shown) that may communicate with the temperature changing compartment 121 through side return air ducts (not shown) to deliver a flow of return air into the cooling compartment 133 for cooling.

The freezing chamber 131 and the variable temperature chamber 121 are both air-cooled, the refrigerating chamber 111 can be directly cooled, and a refrigerating evaporator (not shown) is disposed in the refrigerating inner container and directly cools the refrigerating chamber 111.

In some embodiments, the refrigerator 100 further includes a clamping structure 151 sleeved outside the evaporator 150, and the clamping structure 151 has a front portion and a rear portion that are open, so that the return air flow enters the evaporator 150 from the front side, enters the air supply duct 160 from the rear of the evaporator 150 after being cooled by the evaporator 150, and is delivered to the at least one storage compartment (e.g., the freezing compartment 131) by the air supply duct 160.

The refrigerator 100 may further include a defrosting heating device 101, such as an electric heating wire, and the defrosting heating device 101 is controlled to be activated to heat the evaporator 150 to melt the frost layer on the evaporator 150. The cooling chamber 133 is formed with a drain 133b for discharging defrost water of the evaporator 150 below the evaporator 150, and a drain pipe (not numbered) is connected to the drain 133b, through which the defrost water is transferred to an evaporation pan located in the press chamber, generally, below the condenser, and the defrost water in the evaporation pan is evaporated by absorbing heat of the condenser.

A section of the bottom wall of the freezing inner container located right below the evaporator 150 is referred to as a water receiving section, the water receiving section is substantially funnel-shaped, and the lowest point of the water receiving section is provided with the drainage port 133 b.

In the conventional refrigerator 100, although the foaming layer is filled around the drain pipe, a good heat preservation effect cannot be achieved, hot air in the compressor chamber enters the cooling chamber 133 through the drain pipe and the drain port 133b, and exchanges heat with the evaporator 150 to accelerate frosting of the evaporator 150, so that the refrigeration effect is affected, and the power consumption is increased; especially, for the refrigerator 100 with the cooling chamber 133 at the bottom, compared with the refrigerator 100 with the cooling chamber at the rear of the cabinet, the length of the drain pipe is significantly shortened, the heat preservation effect is further reduced, and the refrigeration of the refrigerator 100 is greatly influenced.

For this reason, the applicant has devised two blowers, and has solved the above-mentioned problems by specifically controlling the operation modes of the two blowers.

Specifically, in the refrigeration process of the refrigerator 100, the first blower 102 and the second blower 103 are configured to controllably make the air volume of the second blower 103 smaller than the air volume of the first blower 102, for example, the rotation speed of the first blower 102 is increased, and the rotation speed of the second blower 103 is decreased, so that the air volume of the second blower 103 is smaller than the air volume of the first blower 102, and thus, the pressure around the evaporator 150 is greater than the atmospheric pressure of the environment where the refrigerator 100 is located, and since the compressor compartment needs to dissipate heat, the space inside the compressor compartment is communicated with the environment, and the pressure around the evaporator 150 is greater than the pressure inside the compressor compartment, thereby preventing the airflow inside the compressor compartment from entering the cooling chamber 133 from the water discharge opening 133b, and further avoiding the formation of convection at the evaporator 150, reducing the frost formation of the evaporator 150, and effectively ensuring the refrigeration effect of the refrigerator 100. In addition, the air volume of the first blower 102 is large, so that the return air speed is increased, and the refrigeration speed can be increased.

In one embodiment, the operation of the first blower 102 and the second blower 103 during the cooling process of the refrigerator 100 can be controlled according to the ambient temperature and the ambient humidity of the refrigerator 100.

Specifically, the refrigerator 100 further includes a temperature sensor (not shown) configured to detect an ambient temperature of the refrigerator 100 and obtain an ambient temperature value, and a humidity sensor (not shown) configured to detect an ambient humidity of the refrigerator 100 and obtain an ambient humidity value.

In the refrigerating process of the refrigerator 100, when the ambient temperature value is higher than the preset temperature value and the ambient humidity value is higher than the preset humidity value, the first blower 102 is configured to controllably increase the air volume thereof, and the second blower 103 is configured to controllably decrease the air volume thereof to increase the air volume difference between the first blower 102 and the second blower 103.

Wherein the predetermined temperature value may be 30 to 38 ℃, e.g., 30 ℃, 32 ℃, 35 ℃, 38 ℃, and the predetermined humidity value may be 70% to 90%, e.g., 70%, 75%, 80%, 85%, etc., when the ambient temperature value is higher than the preset temperature value and the ambient humidity value is higher than the preset humidity value, the environment is in a high temperature and high humidity state, the ambient pressure is increased, and at this time, the pressure at the bottom of the evaporator 150 needs to be increased to prevent the air flow from entering through the water outlet 133b, and therefore, when the air volume of the second blower 103 is smaller than the air volume of the first blower 102, the rotation speed of the first blower 102 is further increased, the rotation speed of the second blower 103 is decreased, therefore, the air volume of the first blower 102 is increased, the air volume of the second blower 103 is decreased, the air volume difference between the first blower 102 and the second blower 103 is increased, and hot air in the compressor compartment is prevented from entering the cooling chamber 133 from the drain opening 133 b.

When the ambient temperature is reduced below the preset temperature and the ambient humidity is reduced below the preset humidity, the first blower 102 is controlled to reduce the air volume, the second blower 103 is controlled to increase the air volume, and under the condition that the air volume difference between the first blower 102 and the second blower 103 is reduced, the air volume of the first blower 102 is kept larger than that of the second blower 103.

In the prior art, the refrigerator 100 periodically defrosts the evaporator 150, and after receiving a defrosting signal, the compressor 104 is controlled to stop operating to suspend the refrigeration of the refrigerator 100, and then the defrosting heating device 101 is started to heat the evaporator 150 for defrosting, and the blower is also controlled to stop operating to prevent hot air from being delivered to the storage compartment through the blower air passage 160 and affecting the temperature of the storage compartment.

Unlike the conventional scheme, in the present embodiment, when the refrigerator 100 receives the defrosting signal and the compressor 104 stops operating, the first blower 102 is configured to be controlled to be turned off, and the second blower 103 is configured to be controlled to be operated for a first preset time to be turned off; or when the defrosting signal is received and the compressor 104 stops running, the first blower 102 and the second blower 103 are configured to be controlled to enable the air volume of the second blower 103 to be larger than that of the first blower 102, and are both operated for the second preset time and are closed. That is to say: when the refrigerator 100 reaches the defrosting condition, after the compressor 104 is stopped, the air volume of the second blower 103 should be larger than the air volume of the first blower 102, and at this time, even the first blower 102 may be stopped, so that the second blower 103 can effectively take away the cold at the evaporator 150; at this time, the pressure at the bottom of the evaporator 150 is lower than the pressure in the compressor compartment, the airflow in the compressor compartment enters the cooling chamber 133 through the water outlet 133b, and the airflow passes through the evaporator 150 to take away part of the cold on the evaporator 150, thereby pre-defrosting the evaporator 150.

After the second blower 103 is operated for a period of time, or after the second blower 103 and the first blower 102 are both operated for a period of time, both the second blower 103 and the first blower 102 are controlled to be turned off, and at this time, the defrosting heating device 101 is controlled to be turned on to defrost the evaporator 150, so that the defrosting time and the energy consumed during defrosting can be reduced.

In the refrigerator 100 of the embodiment, the first blower 102 and the second blower 103 are controlled and regulated respectively in the refrigeration process, so that no airflow enters the cooling chamber 133 through the water outlet 133b in the refrigeration process of the refrigerator 100, and the frosting amount of the evaporator 150 is reduced; moreover, when the defrosting signal is received, the evaporator 150 can be pre-defrosted, so that the defrosting time and the energy consumed during defrosting are reduced.

The present embodiment also provides a control method of the refrigerator 100, including: in the cooling process of the refrigerator 100, the air volume of the second blower 103 is made smaller than the air volume of the first blower 102 so that the pressure around the evaporator 150 is higher than the atmospheric pressure of the air in the environment where the refrigerator 100 is located, thereby preventing the air flow from entering the cooling chamber 133 through the drain opening 133 b.

The control method further comprises the following steps: in the refrigerating process of the refrigerator 100, when the ambient temperature value of the refrigerator 100 is higher than the preset temperature value and the ambient humidity value is greater than the preset humidity value, the air volume of the first blower 102 is increased, and the air volume of the second blower 103 is decreased, so as to increase the air volume difference between the first blower 102 and the second blower 103.

The control method further comprises the following steps: when the defrosting signal is received and the compressor 104 of the refrigerator 100 stops operating, the first blower 102 is turned off, and the second blower 103 is operated for a first preset time to be turned off; or

When the defrosting signal is received and the compressor 104 of the refrigerator 100 stops operating, the air volume of the second blower 103 is made larger than that of the first blower 102, and the second blower is operated for a second preset time and is turned off.

That is to say: when the refrigerator 100 reaches the defrosting condition, after the compressor 104 is stopped, the air volume of the second blower 103 should be larger than the air volume of the first blower 102, and at this time, even the first blower 102 may be stopped, so that the second blower 103 can effectively take away the cold at the evaporator 150; at this time, the pressure at the bottom of the evaporator 150 is lower than the pressure in the compressor compartment, the airflow in the compressor compartment enters the cooling chamber 133 through the water outlet 133b, and the airflow passes through the evaporator 150 to take away part of the cold on the evaporator 150, thereby pre-defrosting the evaporator 150.

Wherein, the value range of the first preset time and the second preset time can be both 5 minutes to 35 minutes.

The control method further comprises the following steps: the defrosting heating means 101 is activated to melt the frost layer on the evaporator 150 when both the first blower 102 and the second blower 103 are turned off.

Fig. 3 exemplarily shows a flowchart of a control method of the refrigerator 100 of the present embodiment, and as shown in fig. 3, the control method of the refrigerator 100 includes:

s302: the refrigerator 100 is in a cooling operation;

s304: judging whether a defrosting signal is received or not, if the defrosting signal is received, switching to the step S312, and if the defrosting signal is not received, switching to the step S306;

s306: the air volume of the second blower 103 is made smaller than that of the first blower 102;

s308: and judging whether the environment temperature value is greater than a preset temperature value or not and whether the environment humidity value is greater than a preset humidity value or not, and if the environment temperature value is greater than the preset temperature value and the environment humidity value is greater than the preset humidity value, switching to the step S310. If not, returning to the step S306;

s310: the air volume of the first blower 102 is increased, and the air volume of the second blower 103 is decreased;

s312: judging whether the compressor 104 stops operating, if so, switching to the step S314;

s314: the air volume of the second blower 103 is larger than that of the first blower 102, and the second blower is operated for a second preset time and is closed;

s316: the defrosting heating device 101 is started.

Thus, it should be appreciated by those skilled in the art that while a number of exemplary embodiments of the invention have been illustrated and described in detail herein, many other variations or modifications consistent with the principles of the invention may be directly determined or derived from the disclosure of the present invention without departing from the spirit and scope of the invention. Accordingly, the scope of the invention should be understood and interpreted to cover all such other variations or modifications.

Claims

1. A refrigerator having a dual blower fan, comprising:

a case defining a cooling chamber and at least one storage compartment therein;

an evaporator disposed within the cooling chamber and configured to cool an airflow entering the cooling chamber;

a first blower located upstream of the evaporator in an airflow path and configured to urge a flow of return air from at least one of the storage compartments into the cooling compartment to be cooled by the evaporator to form a flow of cooled air;

a second blower located downstream of the evaporator in the airflow path and configured to cause at least a portion of the cooling air to flow through a blower airflow path into at least one of the storage compartments;

the cooling chamber is positioned below the evaporator and is provided with a water outlet used for discharging defrosting water of the evaporator;

the first blower and the second blower are configured to control the air volume of the second blower to be smaller than that of the first blower during the refrigeration process of the refrigerator, so that the pressure around the evaporator is higher than the atmospheric air pressure of the environment where the refrigerator is located, and thus the air flow is prevented from entering the cooling chamber from the water outlet.

2. The refrigerator of claim 1, further comprising:

the refrigerator is in refrigeration process, works as ambient temperature value is higher than and predetermines the temperature value just when the ambient humidity value is greater than and predetermines the humidity value, first forced draught blower configures into to make its amount of wind increase controlledly, the second forced draught blower configures into to make its amount of wind reduce controlledly, with the increase first forced draught blower with the amount of wind difference of second forced draught blower.

3. The refrigerator of claim 1, wherein

The first blower is configured to be controlled to be turned off and the second blower is configured to be controlled to be operated for a first preset time to be turned off when a defrosting signal is received and the compressor of the refrigerator stops operating; or

When the defrosting signal is received and the compressor of the refrigerator stops running, the first blower and the second blower are configured to be controlled to enable the air volume of the second blower to be larger than that of the first blower, and the first blower and the second blower are operated for a second preset time and are closed.

4. The refrigerator of claim 3, further comprising:

a defrosting heating device configured to be activated to melt a frost layer on the evaporator when both the first blower and the second blower are turned off.

5. The refrigerator of claim 1, the cabinet comprising:

a freezing inner container, wherein the cooling chamber is limited at the lower part in the freezing inner container;

6. The refrigerator of claim 1, wherein

A press cabin is further defined in the box body and is located behind the cooling chamber.

7. A control method of a refrigerator, wherein the refrigerator includes a cooling chamber, at least one storage compartment, an evaporator provided in the cooling chamber and configured to cool an air flow entering the cooling chamber to form a cooling air flow, a first blower located upstream of the evaporator in an air flow path and configured to cause a return air flow of the at least one storage compartment to enter the cooling chamber, a second blower located downstream of the evaporator in the air flow path and configured to cause at least a part of the cooling air flow to flow into the at least one storage compartment, and a defrosting heating device for defrosting the evaporator, and the cooling chamber is located below the evaporator and is formed with a drain port for draining defrosting water of the evaporator;

the control method comprises the following steps: in the refrigerating process of the refrigerator, the air volume of the second blower is smaller than that of the first blower, so that the pressure around the evaporator is higher than the atmospheric air pressure of the environment where the refrigerator is located, and airflow is prevented from entering the cooling chamber from the water outlet.

8. The control method according to claim 7, further comprising:

in the refrigeration process of the refrigerator, when the ambient temperature value of the refrigerator is greater than the preset temperature value and the ambient humidity value is greater than the preset humidity value, the air volume of the first air blower is increased, and the air volume of the second air blower is reduced, so that the air volume difference value of the first air blower and the second air blower is increased.

9. The control method according to claim 7, further comprising:

when a defrosting signal is received and the compressor of the refrigerator stops running, the first air blower is turned off, and the second air blower is turned off for a first preset time; or

And when the defrosting signal is received and the compressor of the refrigerator stops running, the air volume of the second air blower is made to be larger than that of the first air blower, and the second air blower is operated for a second preset time and is closed.

10. The control method according to claim 9, further comprising:

and starting the defrosting heating device when the first air blower and the second air blower are both closed so as to melt the frost layer on the evaporator.