Refrigeration extractor hood system and control method thereof

Abstract

The invention relates to a refrigeration extractor hood system and a control method thereof, the refrigeration extractor hood system comprises an oil smoke suction module, a compressor, a heat dissipation module and an indoor unit module, the oil smoke suction module comprises an oil smoke suction fan, the heat dissipation module comprises a condenser and a heat dissipation fan, the heat dissipation fan is provided with fan blades and a heat dissipation motor for driving the fan blades to rotate, and the indoor unit module comprises an evaporator and an indoor unit fan. The heat dissipation module is provided with a heat dissipation cavity and a motor installation cavity which are isolated from each other, the condenser and the fan blades are installed in the heat dissipation cavity, and the heat dissipation motor is installed in the motor installation cavity. The refrigeration extractor hood system has the advantages that the heat dissipation motor is arranged in the independent cavity outside the heat dissipation module, it can be guaranteed that the performance of the heat dissipation motor is not reduced during operation, and the control method controls reversing of the three-way valve on the refrigerant pipeline according to the temperature detected by each temperature sensor; complete machine cooling capacity and refrigeration stability of the system can be guaranteed, and condensate water generated on the surface of the motor mounting cavity due to too low temperature can be prevented.

Description

Technical Field

[0001] The invention relates to a range hood, and in particular to a refrigeration range hood system and a control method thereof. Background Art

[0002] There are various refrigeration-type range hoods disclosed in the prior art. On the basis of the range hood platform, an air conditioning component is added. The refrigeration-type range hood can realize all the functions of the range hood and the functions of the air conditioning. Figure 2 As shown, the refrigeration range hood system includes a fume extraction module, a compressor, a heat dissipation module and an internal unit module. The heat dissipation module and the internal unit module are arranged outside the fume extraction fan. The heat dissipation module includes a condenser and a heat dissipation fan. The heat dissipation fan has a fan blade and a heat dissipation motor for driving the fan blade to rotate. The internal unit module includes an evaporator and an internal unit fan. The compressor, the condenser and the evaporator are connected through a refrigerant pipeline. A throttling device is installed on the refrigerant pipeline between the condenser and the evaporator. In order to reduce the influence of the range hood's fume extraction ability, the existing refrigeration range hood often uses a low wind speed to dissipate the heat of the condenser. At a low wind speed, the temperature of the condenser can often reach above 60°C, and the wind dissipating the condenser will pass through the heat dissipation motor and heat the heat dissipation motor, thereby affecting the performance of the heat dissipation motor, reducing the heat dissipation air volume. For the entire refrigeration system, the heat dissipation air volume is small, thereby reducing the cooling capacity and stability of the whole machine. In order to solve the impact of the heat dissipation motor's temperature rise on performance, the heat dissipation motor is usually arranged outside the heat dissipation module housing, but the heat in the heat dissipation module will be transferred to the motor through the motor shaft. After working for a long time, the motor will still heat up, thereby reducing performance. The control board of the heat dissipation motor can also be arranged outside the heat dissipation module, but the heat in the heat dissipation module will affect the magnetic poles inside the motor, causing excessive temperature or even demagnetization, thereby affecting the motor performance. In summary, the existing refrigeration range hood system needs to be further improved. Summary of the invention

[0003] The first technical problem to be solved by the present invention is to provide a refrigeration range hood system that avoids the adverse effect of the temperature rise of the wind heat dissipation motor of the condenser heat dissipation in view of the above-mentioned existing technical status.

[0004] The second technical problem to be solved by the present invention is to provide a control method for a refrigeration range hood system that can ensure that the performance of the heat dissipation motor is not reduced during operation and ensure the cooling capacity and refrigeration stability of the system in response to the above-mentioned existing technical status.

[0005] The technical solution adopted by the present invention to solve the first technical problem mentioned above is: the refrigeration range hood system includes a range hood suction module, a compressor, a heat dissipation module and an indoor unit module, the range hood suction module includes a range hood fan, the heat dissipation module and the indoor unit module are arranged on the outside of the range hood fan, the heat dissipation module includes a condenser and a heat dissipation fan, the heat dissipation fan has fan blades and a heat dissipation motor for driving the fan blades to rotate, the indoor unit module includes an evaporator and an indoor unit fan, the compressor, condenser and evaporator are connected through a refrigerant pipeline, and a throttling device is installed on the refrigerant pipeline between the condenser and the evaporator, characterized in that: the heat dissipation module has a heat dissipation cavity and a motor installation cavity isolated from each other, the condenser and the fan blades are installed in the heat dissipation cavity, and the heat dissipation motor is installed in the motor installation cavity.

[0006] The refrigeration range hood system also includes a first three-way valve and a second three-way valve, wherein the inlet of the first three-way valve is connected to the outlet of the throttling device, the first outlet of the first three-way valve is connected to the evaporator, the second outlet of the first three-way valve is connected to the inlet of the second three-way valve, the first outlet of the second three-way valve is connected to the inlet of the compressor, the second outlet of the second three-way valve is connected to the first outlet of the first three-way valve, and the refrigerant pipeline between the second outlet of the first three-way valve and the inlet of the second three-way valve can exchange heat with the heat dissipation motor in the motor mounting cavity.

[0007] In order to enable the refrigerant to exchange heat with the heat dissipating motor, the refrigerant pipeline between the second outlet of the first three-way valve and the inlet of the second three-way valve has a refrigerant pipeline heat exchange section arranged on the outer wall of the motor installation cavity.

[0008] In order to make the heat exchange between the refrigerant and the heat dissipation motor more complete, the refrigerant pipeline heat exchange section is attached to and arranged on the outer wall of the motor installation cavity.

[0009] In order to improve the intelligence level of the system, the refrigeration range hood system also includes a first temperature sensor, a second temperature sensor, a third temperature sensor, a fourth temperature sensor and a controller. The first temperature sensor is used to detect the internal temperature of the motor installation cavity, the second temperature sensor is used to detect the external ambient temperature of the range hood, the third temperature sensor is used to detect the pipe temperature at the outlet of the heat exchange section of the refrigerant pipeline, and the fourth temperature sensor is used to detect the pipe temperature at the outlet of the evaporator. The controller can receive output signals of the first temperature sensor, the second temperature sensor, the third temperature sensor, and the fourth temperature sensor and control the working states of the first three-way valve and the second three-way valve accordingly according to the received signals.

[0010] In order to enable the first temperature sensor to detect the temperature of the heat dissipating motor, the first temperature sensor is installed inside the motor installation cavity.

[0011] In order to enable the second temperature sensor to detect the indoor ambient temperature, the indoor unit module has an indoor unit return air outlet, and the second temperature sensor is installed at the indoor unit return air outlet of the indoor unit module.

[0012] In order to enable the third temperature sensor to detect the temperature of the heat exchange section of the refrigerant pipeline after heat exchange, and to enable the fourth temperature sensor to detect the temperature of the evaporator outlet section, the third temperature sensor is installed on the refrigerant pipeline between the outlet of the heat exchange section of the refrigerant pipeline and the inlet of the second three-way valve, and the fourth temperature sensor is installed on the refrigerant pipeline between the evaporator outlet and the compressor inlet.

[0013] In order to allow the hot air blown out by the heat dissipation fan to enter the interior of the range fumes suction fan, the air outlet of the heat dissipation fan is fluidically connected to the air inlet of the range fumes suction fan.

[0014] The technical solution adopted by the present invention to solve the second technical problem is: the control method of the refrigeration range hood system comprises the following steps:

[0015] S1, the range hood turns on the cooling mode;

[0016] S2, determining whether the temperature T1 detected by the first temperature sensor satisfies T1 ≥ ΔT°C, where ΔT is the maximum ambient temperature that the heat dissipation motor can withstand;

[0017] If yes, go to step S3;

[0018] If not, the second outlet of the first three-way valve is closed, and the refrigeration system operates normally;

[0019] S3, adjusting the first three-way valve, the opening of the first outlet of the first three-way valve is reduced, the opening of the second outlet is increased, the temperature T1 is reduced, and then entering step S4;

[0020] S4, determine whether T1≥ΔT℃ is satisfied,

[0021] If yes, return to step S3;

[0022] If not, proceed to step S5;

[0023] S5, determining whether the temperature T1 detected by the first temperature sensor satisfies T1 ≥ t°C, where t is the ambient temperature detected by the second temperature sensor;

[0024] If yes, proceed to step S6;

[0025] If not, the first three-way valve is adjusted, the opening of the first outlet of the first three-way valve is increased, and the opening of the second outlet of the second three-way valve is decreased, and then the process returns to step S2;

[0026] S6, determining whether the temperature T3 detected by the third temperature sensor satisfies T3 ≥ T4°C, where T4 is the temperature at the outlet pipe of the evaporator detected by the fourth temperature sensor;

[0027] If yes, the first outlet of the second three-way valve is opened, the second outlet is closed, and the system operates normally;

[0028] If not, the first outlet of the second three-way valve is closed, the second outlet is opened, and the system operates normally.

[0029] Compared with the prior art, the advantages of the present invention are: the refrigeration range hood system includes a range hood module, a compressor, a heat dissipation module and an indoor unit module, the heat dissipation module has a heat dissipation cavity and a motor mounting cavity isolated from each other, the condenser and the fan heat dissipation fan are installed in the heat dissipation cavity, and the heat dissipation motor of the heat dissipation fan is installed in the motor mounting cavity, that is, the heat dissipation motor is arranged in an independent cavity outside the heat dissipation module, which can ensure that the performance of the heat dissipation motor is not reduced during operation. In addition, the control method can control the reversing of the three-way valve on the refrigerant pipeline according to the temperature detected by each temperature sensor, which can ensure the overall cooling capacity and refrigeration stability of the system, and can also prevent condensation water from being generated on the surface of the motor mounting cavity due to excessively low temperature. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a structural schematic diagram of a refrigeration range hood according to an embodiment of the present invention;

[0031] Figure 2 It is a schematic diagram of the principle of an existing refrigeration range hood system;

[0032] Figure 3 A schematic diagram of the principle of a refrigeration range hood system according to an embodiment of the present invention;

[0033] Figure 4 The figure is a flow chart of a control method of a refrigeration range hood system according to an embodiment of the present invention. DETAILED DESCRIPTION

[0034] The present invention is further described in detail below with reference to the accompanying drawings.

[0035] like Figure 1 and Figure 3 As shown, the refrigeration range hood system of this embodiment includes a range hood suction module 1, a compressor 2, a heat dissipation module 3 and an indoor module 4, the range hood suction module 1 includes a range hood suction fan 11, the heat dissipation module 3 and the indoor module 4 are arranged outside the range hood suction fan 11, the heat dissipation module 3 includes a condenser 31 and a heat dissipation fan 32, the indoor module 4 includes an evaporator 41 and an indoor fan 42, the compressor 2, the condenser 31 and the evaporator 41 are connected through a refrigerant pipeline 5, and a throttling device 6 is installed on the refrigerant pipeline 5 between the condenser 31 and the evaporator 41.

[0036] The heat dissipation module 3 has a heat dissipation cavity 33 and a motor installation cavity 34 which are isolated from each other. The condenser 31 and the fan blades 321 are installed in the heat dissipation cavity 33. The heat dissipation fan 32 has the fan blades 321 and a heat dissipation motor 322 which drives the fan blades 321 to rotate. The heat dissipation motor 322 is installed in the motor installation cavity 34. The air outlet of the heat dissipation fan 32 can be directly connected to the outside of the range hood, or can be fluidly connected to the inside of the volute of the range hood fan 11 through the air inlet on the volute ring wall, or can be fluidly connected to the air inlet of the range hood fan 11 through the air inlet on the fan frame.

[0037] The refrigeration range hood system of this embodiment is provided with a first three-way valve 71 and a second three-way valve 72 installed on the refrigerant pipeline 5. The inlet of the first three-way valve 71 is connected to the outlet of the throttling device 6, the first outlet of the first three-way valve 71, namely the A-direction port, is connected to the evaporator 41, the second outlet of the first three-way valve 71, namely the B-direction port, is connected to the inlet of the second three-way valve 72, the first outlet of the second three-way valve 72, namely the C-direction port, is connected to the inlet of the compressor 2, and the second outlet of the second three-way valve 72, namely the D-direction port, is connected to the first outlet of the first three-way valve 71. The refrigerant pipeline 5 between the second outlet of the first three-way valve 71 and the inlet of the second three-way valve 72 has a refrigerant pipeline heat exchange section 51 arranged on the outer wall of the motor installation cavity 34. To improve the heat exchange effect, the refrigerant pipeline heat exchange section 51 is attached to and arranged on the outer wall of the motor installation cavity 34, so that the refrigerant pipeline heat exchange section 51 can exchange heat with the heat dissipation motor 322 in the motor installation cavity 34.

[0038] The refrigeration range hood system of this embodiment includes a first temperature sensor 81, a second temperature sensor 82, a third temperature sensor 83, a fourth temperature sensor 84 and a controller. The first temperature sensor 81 is installed inside the motor installation cavity 34 to detect the temperature inside the motor installation cavity 34. The second temperature sensor 82 is installed at the inner unit return air port 43 of the inner unit module 4 to detect the ambient temperature outside the range hood. The third temperature sensor 83 is installed on the refrigerant pipeline 5 between the outlet of the refrigerant pipeline heat exchange section 51 and the inlet of the second three-way valve 72 to detect the pipeline temperature at the outlet of the refrigerant pipeline heat exchange section 51. The fourth temperature sensor 84 is installed on the refrigerant pipeline 5 between the outlet of the evaporator 41 and the inlet of the compressor 2 to detect the pipeline temperature at the outlet of the evaporator 41. The controller can receive the output signals of the first temperature sensor 81, the second temperature sensor 82, the third temperature sensor 83 and the fourth temperature sensor 84 and control the switching of the first three-way valve 71 and the second three-way valve 72 accordingly according to the received signals.

[0039] like Figure 4 As shown, the control method of the refrigeration range hood system includes the following steps:

[0040] S1, the range hood turns on the cooling mode;

[0041] S2, determining whether the temperature T1 detected by the first temperature sensor 81 satisfies T1 ≥ ΔT°C, where ΔT is the maximum ambient temperature that the heat dissipation motor 322 can withstand;

[0042] If yes, go to step S3;

[0043] If not, the second outlet of the first three-way valve 71 is closed, and the refrigeration system operates normally;

[0044] S3, adjusting the first three-way valve 71, the opening of the first outlet of the first three-way valve 71 is reduced, the opening of the second outlet is increased, the temperature T1 is reduced, and then entering step S4;

[0045] S4, determine whether T1≥ΔT℃ is satisfied,

[0046] If yes, return to step S3;

[0047] If not, proceed to step S5;

[0048] S5, determining whether the temperature T1 detected by the first temperature sensor 81 satisfies T1 ≥ t°C, where t is the ambient temperature detected by the second temperature sensor 82;

[0049] If yes, proceed to step S6;

[0050] If not, the first three-way valve 71 is adjusted, the opening of the first outlet of the first three-way valve 71 is increased, and the opening of the second outlet of the second three-way valve 72 is decreased, and then the process returns to step S2;

[0051] S6, determining whether the temperature T3 detected by the third temperature sensor 83 satisfies T3 ≥ T4°C, where T4 is the temperature at the outlet of the evaporator 41 detected by the fourth temperature sensor 84;

[0052] If yes, the first outlet of the second three-way valve 72 is opened, the second outlet is closed, and the system operates normally;

[0053] If not, the first outlet of the second three-way valve 72 is closed, and the second outlet is opened, and the system operates normally.

[0054] As can be seen from the above control logic, the refrigerant pipeline 5 flowing into the evaporator 41 through the throttling device 6 is designed with a bifurcated flow path by the first three-way valve 71. One path is introduced into the evaporator 41 along the A direction, and the other path goes to the motor installation cavity 34 where the heat dissipation motor 32 is located along the B direction. And this refrigerant pipeline 5 is closely attached and coiled on the wall surface of the motor installation cavity 34. The flow direction and flow rate of both the A path and the B path are controlled by the first three-way valve 71. The refrigerant flowing along the B direction reaches the wall surface of the motor installation cavity 34, and the cold in the refrigerant is used to cool the motor installation cavity 34, so as to control the temperature of the heat dissipation motor 32 within the required temperature. If the internal temperature of the motor installation cavity 34 detected by the first temperature sensor 81 is lower than the ambient temperature detected by the second temperature sensor 82, that is, T1 < t °C, at this time, condensate may be generated on the surface of the motor installation cavity 34, indicating that the flow rate in the B direction is too large. Therefore, it is necessary to reduce the flow rate in the B direction to avoid the generation of condensate.

[0055] Since the amount of cold required to cool the motor installation cavity 34 is small, there may still be residual cold in the refrigerant flowing through the B direction. A second three-way valve 72 is provided at the refrigerant pipeline after coiling around the motor installation cavity 34. The second three-way valve 72 bifurcates the flow path into two paths. One path flows along the C direction to the compressor 2, and the other path continues to flow along the D direction to the evaporator 41. A third temperature sensor 83 is arranged at the pipeline after coiling around the independent cavity, and a fourth temperature sensor 84 is arranged at the outlet pipe of the evaporator 41. The refrigerant after dissipating heat from the motor installation cavity 34 needs to determine its flow direction according to the temperature. When T3 ≥ T4 °C, the second three-way valve 72 is directed to the C direction, and the system operates normally. When T3 < T4 °C, it indicates that there is residual cold, and the second three-way valve 72 is directed to the D direction for internal unit refrigeration and heat exchange.

[0056] As used in the present invention, "fluid communication" refers to the spatial position relationship between two components or parts, hereinafter uniformly referred to as the first part and the second part respectively, that is, the fluid (gas, liquid or a mixture of both) can flow along the flow path from the first part and / or be transported to the second part. It can be that the first part and the second part are directly connected, or the first part and the second part are indirectly connected through at least one third party. The third party can be a fluid channel such as a pipeline, a passage, a conduit, a flow guide, a hole, a groove, etc., or a chamber allowing the fluid to flow through, or a combination of the above.

Claims

1. A refrigeration range hood system, comprising a range hood suction module (1), a compressor (2), a heat dissipation module (3) and an indoor module (4), wherein the range hood suction module (1) comprises a range hood suction fan (11), the heat dissipation module (3) and the indoor module (4) are arranged outside the range hood suction fan (11), the heat dissipation module (3) comprises a condenser (31) and a heat dissipation fan (32), the heat dissipation fan (32) has a fan blade (321) and a heat dissipation motor (322) for driving the fan blade (321) to rotate, the indoor module (4) comprises an evaporator (41) and an indoor fan (42), the compressor (2), the condenser (31) and the evaporator (41) are connected through a refrigerant pipeline (5), and a throttling device (6) is installed on the refrigerant pipeline (5) between the condenser (31) and the evaporator (41), characterized in that: The heat dissipation module (3) comprises a heat dissipation cavity (33) and a motor installation cavity (34) which are isolated from each other; the condenser (31) and the fan blade (321) are installed in the heat dissipation cavity (33); and the heat dissipation motor (322) is installed in the motor installation cavity (34).

2. The refrigeration range hood system according to claim 1, characterized in that: It also includes a first three-way valve (71) and a second three-way valve (72), wherein the inlet of the first three-way valve (71) is connected to the outlet of the throttling device (6), the first outlet of the first three-way valve (71) is connected to the evaporator (41), the second outlet of the first three-way valve (71) is connected to the inlet of the second three-way valve (72), the first outlet of the second three-way valve (72) is connected to the inlet of the compressor (2), the second outlet of the second three-way valve (72) is connected to the first outlet of the first three-way valve (71), and the refrigerant pipeline (5) between the second outlet of the first three-way valve (71) and the inlet of the second three-way valve (72) can exchange heat with the heat dissipation motor (322) in the motor installation cavity (34).

3. The refrigeration range hood system according to claim 2, characterized in that: The refrigerant pipeline (5) between the second outlet of the first three-way valve (71) and the inlet of the second three-way valve (72) has a refrigerant pipeline heat exchange section (51) arranged on the outer wall of the motor installation cavity (34).

4. The refrigeration range hood system according to claim 3, characterized in that: The refrigerant pipeline heat exchange section (51) is adhered to and arranged on the outer wall of the motor installation cavity (34).

5. The refrigeration range hood system according to claim 3, characterized in that: It also includes a first temperature sensor (81), a second temperature sensor (82), a third temperature sensor (83), a fourth temperature sensor (84) and a controller, wherein the first temperature sensor (81) is used to detect the internal temperature of the motor installation cavity (34), the second temperature sensor (82) is used to detect the external ambient temperature of the range hood, the third temperature sensor (83) is used to detect the pipe temperature at the outlet of the heat exchange section (51) of the refrigerant pipe, and the fourth temperature sensor (84) is used to detect the pipe temperature at the outlet of the evaporator (41). The controller can receive the output signals of the first temperature sensor (81), the second temperature sensor (82), the third temperature sensor (83), and the fourth temperature sensor (84) and control the working states of the first three-way valve (71) and the second three-way valve (72) accordingly according to the received signals.

6. The refrigeration range hood system according to claim 5, characterized in that: The first temperature sensor (81) is installed inside the motor installation cavity (34).

7. The refrigeration range hood system according to claim 5, characterized in that: The indoor unit module (4) has an indoor unit return air port (43), and the second temperature sensor (82) is installed at the indoor unit return air port (43) of the indoor unit module (4).

8. The refrigeration range hood system according to claim 5, characterized in that: The third temperature sensor (83) is installed on the refrigerant pipeline (5) between the outlet of the refrigerant pipeline heat exchange section (51) and the inlet of the second three-way valve (72), and the fourth temperature sensor (84) is installed on the refrigerant pipeline (5) between the outlet of the evaporator (41) and the inlet of the compressor (2).

9. The refrigeration range hood system according to claim 1, characterized in that: The air outlet of the heat dissipation fan (32) is fluidically connected to the air inlet of the range fumes suction fan (11).

10. A control method for a refrigeration range hood system, characterized in that: The control method is applied to the refrigeration range hood system, and the control method comprises the following steps: S1, the range hood turns on the cooling mode; S2, determining whether the temperature T1 detected by the first temperature sensor (81) satisfies T1≥ΔT°C, where ΔT is the maximum ambient temperature that the heat dissipation motor (322) can withstand; If yes, go to step S3; If not, the second outlet of the first three-way valve (71) is closed and the refrigeration system operates normally; S3, adjusting the first three-way valve (71), the opening of the first outlet of the first three-way valve (71) is reduced, the opening of the second outlet is increased, the temperature T1 is reduced, and then entering step S4; S4, determine whether T1≥ΔT℃ is satisfied, If yes, return to step S3; If not, proceed to step S5; S5, determining whether the temperature T1 detected by the first temperature sensor (81) satisfies T1 ≥ t°C, where t is the ambient temperature detected by the second temperature sensor (82); If yes, proceed to step S6; If not, the first three-way valve (71) is adjusted, the opening of the first outlet of the first three-way valve (71) is increased, and the opening of the second outlet of the second three-way valve (72) is decreased, and then the process returns to step S2; S6, determining whether the temperature T3 detected by the third temperature sensor (83) satisfies T3 ≥ T4°C, where T4 is the temperature at the outlet of the evaporator (41) detected by the fourth temperature sensor (84); If yes, the first outlet of the second three-way valve (72) is opened, the second outlet is closed, and the system operates normally; If not, the first outlet of the second three-way valve (72) is closed and the second outlet is opened, and the system operates normally.

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