Kitchen air conditioning system and control method thereof

Abstract

A kitchen air conditioning system and control method thereof, an air conditioning component and a fume extraction component, the air conditioning component including a compressor, a first heat exchanger and a second heat exchanger, the fume extraction component including a first fan and a smoke exhaust passage arranged at the rear end of the first fan, the first heat exchanger being arranged in the smoke exhaust passage, a damper being installed at the outlet of the smoke exhaust passage, and a controller for controlling the opening and closing of the damper by reading the rotation speed and gear position data of the first fan. The kitchen air conditioning system arranges the first heat exchanger in the smoke exhaust passage, and utilizes the principle that when the gear position of a DC motor remains unchanged, the increase in resistance will lead to an increase in the fan speed. The controller can determine the blockage of condensed water on the first heat exchanger by the speed, and the static pressure can be increased by controlling the valve plate to be closed, and the dynamic pressure can be quickly increased by opening the valve plate, so as to blow out the condensed water on the first heat exchanger, thereby improving the performance of the first heat exchanger and the smoke exhaust effect of the range hood.

Description

Technical Field

[0001] The invention relates to an air conditioning system, in particular to a kitchen air conditioning system and a control method thereof. Background Art

[0002] The kitchen is the main place for people to cook. The quality of the kitchen air environment directly affects the mood of the cook. Especially in the hot summer, the hot and stuffy environment of the kitchen brings great discomfort to the cook. For this reason, people have invented various kitchen air conditioners to cool the kitchen air. Existing kitchen air conditioners are often independent of the kitchen range hood, and there is no mutual coordination between the two. For the integrated kitchen air conditioner, due to the limited installation space, the heat generated during the working process cannot be taken away in time and effectively, thus affecting the use effect of the air conditioner. For this reason, the applicant has previously invented a kitchen air conditioning system in which a heat exchanger is installed inside the range hood. In the cooling mode, the heat exchanger inside the range hood is used as a condenser, and the heat generated by it can be taken away by the oil smoke, thereby improving the energy efficiency of the air conditioner. However, in the heating mode, the heat exchanger inside the range hood is used as an evaporator. When moisture condenses on the heat exchanger, if it cannot be discharged in time, it will cause the range hood air duct to be blocked, affecting the exhaust effect of the oil smoke, and will also affect the heat exchange effect of the heat exchanger, thereby reducing the refrigeration performance of the refrigeration system. Summary of the invention

[0003] The first technical problem to be solved by the present invention is to provide a kitchen air conditioning system capable of smoothly discharging condensed water of a heat exchanger in a smoke exhaust channel in response to the above-mentioned prior art status.

[0004] The second technical problem to be solved by the present invention is to provide a control method for a kitchen air conditioning system in which an air valve and a fan cooperate and the control logic is simple, in view of the above-mentioned existing technical status.

[0005] The technical solution adopted by the present invention to solve the above-mentioned first technical problem is: the kitchen air conditioning system includes an air conditioning component and an oil fume suction component, the air conditioning component includes a compressor, a first heat exchanger and a second heat exchanger, the compressor, the first heat exchanger and the second heat exchanger are connected through a refrigerant pipeline, a four-way valve is installed on the refrigerant pipeline, the oil fume suction component includes a first fan and a smoke exhaust channel arranged at the rear end of the first fan, and is characterized in that: the first heat exchanger is arranged in the smoke exhaust channel, an air valve is installed at the outlet of the smoke exhaust channel, and also includes a controller for controlling the opening and closing of the air valve by reading the speed and gear data of the first fan.

[0006] In order to avoid excessive condensed water remaining in the smoke exhaust channel and affecting the smoke exhaust effect, a condensed water collecting device and a spraying or atomizing device are installed in the smoke exhaust channel. The condensed water collecting device is used to collect the condensed water generated by the first heat exchanger, and the spraying or atomizing device is used to spray or atomize the condensed water collected by the condensed water collecting device into the smoke exhaust channel.

[0007] In order to facilitate smooth outflow of condensed water generated by the first heat exchanger, the first heat exchanger is arranged to be inclined relative to the vertical plane.

[0008] In order to prevent the oil smoke from polluting the first heat exchanger, an oil smoke purification device is installed in the exhaust passage, and the oil smoke purification device is arranged at the front end of the first heat exchanger.

[0009] Further preferably, an indoor unit is installed in the kitchen, the second heat exchanger is installed in the indoor unit, the indoor unit is provided with an air inlet and an air outlet, the air inlet is connected to the outside, and the air outlet is connected to the kitchen.

[0010] In order to make full use of the corner of the kitchen, the indoor unit is installed in the corner of the kitchen cabinet, and the compressor is integrated on the range fumes suction component or on the indoor unit.

[0011] In order to allow the air passing through the second heat exchanger to be smoothly replenished into the kitchen, a second fan is installed in the indoor unit near the air outlet, and the second fan is located between the second heat exchanger and the air outlet.

[0012] The condensate collecting device may have various structures. Preferably, the condensate collecting device comprises a water receiving tray and a liquid guiding pipe. The water receiving tray is arranged below the first heat exchanger, and the liquid guiding pipe is connected between the water receiving tray and the spraying or atomizing device.

[0013] As a preferred embodiment of any of the above solutions, the motor used by the first fan is a DC motor.

[0014] The technical solution adopted by the present invention to solve the second technical problem is: the control method of the kitchen air conditioning system is characterized by comprising the following steps:

[0015] 1) The system starts running;

[0016] 2) The first fan operates at the preset gear position P1;

[0017] 3) The controller determines whether the speed Z1 corresponding to the first fan gear position P1 is greater than the warning speed Z2;

[0018] If Z1>Z2, the air valve is closed and the process goes to step 4);

[0019] If Z1≤Z2, return to step 3);

[0020] 4) The first fan operates at a higher gear position P2;

[0021] 5) The air valve is open;

[0022] 6) The first fan continues to operate at gear position P1;

[0023] 7) Whether to turn off the first fan;

[0024] If so, the system stops running;

[0025] If no, return to step 3).

[0026] Compared with the prior art, the advantages of the present invention are: the kitchen air conditioning system arranges the first heat exchanger of the air conditioning component in the smoke exhaust channel, and utilizes the principle that when the gear position of the DC motor remains unchanged, the increase in resistance will lead to an increase in the fan speed. The controller can judge the blockage of condensed water on the first heat exchanger by the speed, and the controller can increase the static pressure by controlling the valve plate to close, and quickly increase the dynamic pressure by opening the valve plate, thereby blowing out the condensed water on the first heat exchanger, which is beneficial to improving the performance of the first heat exchanger and the smoke exhaust effect of the range hood. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a structural schematic diagram of an embodiment of the present invention;

[0028] Figure 2 is a schematic diagram of an embodiment of the present invention;

[0029] Figure 3 4 is a control logic diagram of a control method according to an embodiment of the present invention. DETAILED DESCRIPTION

[0030] The present invention is further described in detail below with reference to the accompanying drawings.

[0031] like Figure 1 and Figure 2 As shown, the kitchen air conditioning system of this embodiment includes an air conditioning component 1 and a fume extraction component 2. The air conditioning component 1 specifically includes a compressor 11, a first heat exchanger 12 and a second heat exchanger 13. The compressor 11, the first heat exchanger 12 and the second heat exchanger 13 are connected through a refrigerant pipeline 14. A four-way valve 15 and a throttling component 10 are installed on the refrigerant pipeline 14. By switching the four-way valve 15, the air conditioning working mode is switched, that is, it can work in heating mode or cooling mode. The working principle of the air conditioning component 1 is the same as that of the existing air conditioner and will not be described in detail here.

[0032] In this embodiment, an indoor unit 6 is installed at a corner of the kitchen upper cabinet 7. The indoor unit 6 has an air inlet 61 and an air outlet 62. The air inlet 61 is connected to the outside, and the air outlet 62 is connected to the kitchen. The second heat exchanger 13 is installed in the indoor unit 6. In addition, a second fan 63 is also installed in the indoor unit 6. The second fan 63 is located between the second heat exchanger 13 and the air outlet 62, so as to quickly blow the air flowing through the second heat exchanger 13 to the kitchen.

[0033] The oil fume suction component 2 has a housing 20, a first fan 21 is installed in the housing 20, and a smoke exhaust passage 22 is provided inside the housing 20 and at the rear end of the first fan 21. In this embodiment, the compressor 11 and the first heat exchanger 12 are integrated on the oil fume suction component 2, and the first heat exchanger 12 is arranged in the smoke exhaust passage 22. In order to prevent oil fume from polluting the first heat exchanger 12, an oil fume purification device 5 is also installed in the smoke exhaust passage 22, and the oil fume purification device 5 is arranged at the front end of the first heat exchanger 12. Generally, the oil fume purification device 5 can adopt various front-end electrostatic purification devices disclosed in the prior art, and the specific structure will not be described in detail here.

[0034] In this embodiment, the first heat exchanger 12 is arranged at an angle relative to the vertical plane, and a condensate collection device 3 and a spray or atomization device 4 are installed in the smoke exhaust channel 22. The condensate collection device 3 is used to collect the condensate generated by the first heat exchanger 12, and the spray or atomization device 4 is used to spray or atomize the condensate collected by the condensate collection device 3 into the smoke exhaust channel 22. Specifically, the condensate collection device 3 includes a water receiving tray 31 and a liquid guide tube 32. The water receiving tray 31 is arranged below the first heat exchanger 12, and the liquid guide tube 32 is connected between the water receiving tray 31 and the spray or atomization device 4. .

[0035] When the system is working in cooling mode, the first heat exchanger 12 is used as a condenser and the second heat exchanger 13 is used as an evaporator. Cold air is blown into the kitchen from the air outlet 62 of the indoor unit 6. At the same time, the oil smoke discharged from the smoke exhaust channel 22 can take away the heat generated by the first heat exchanger 23 to improve its heat exchange effect, thereby improving the air conditioning energy efficiency.

[0036] When the system is working in heating mode, the first heat exchanger 12 is used as an evaporator and the second heat exchanger 13 is used as a condenser. Warm air is blown out from the air outlet 62 of the indoor unit 6 into the kitchen. At the same time, condensed water is generated on the first heat exchanger 12 located in the smoke exhaust channel 22. The condensed water flows into the water receiving tray 31 and then flows into the spray or atomization device 4 through the liquid guide pipe 32. After being sprayed or atomized by the spray or atomization device 4, the condensed water is discharged out of the smoke exhaust channel 22 along with the oil smoke, thereby preventing the condensed water from affecting the heat exchange effect of the first heat exchanger 12 and the smoke exhaust effect of the smoke exhaust channel 22.

[0037] In this embodiment, a damper 8 is installed at the outlet of the smoke exhaust passage 22 , and a controller (not shown) is provided on the smoke suction assembly. The controller controls the opening and closing of the damper 8 by reading the rotation speed and gear position data of the first fan 21 .

[0038] like Figure 3 As shown, the control method of the kitchen air conditioning system of this embodiment includes the following steps:

[0039] 1) The system starts running;

[0040] 2) The first fan 21 operates at the preset gear position P1;

[0041] 3) The controller determines whether the speed Z1 corresponding to the first fan gear position P1 is greater than the warning speed Z2;

[0042] If Z1>Z2, the air valve 8 is closed and the process goes to step 4);

[0043] If Z1≤Z2, return to step 3);

[0044] 4) The first fan operates at a higher gear position P2;

[0045] 5) The air valve 8 is opened;

[0046] 6) The first fan 21 continues to operate at the gear position P1;

[0047] 7) Whether to turn off the first fan;

[0048] If so, the system stops running;

[0049] If no, return to step 3).

[0050] The motor used by the first fan 21 of this embodiment is a DC motor. When the DC motor is running, if the gear position remains unchanged, the resistance increases, which leads to an increase in the fan speed. Therefore, when the first heat exchanger 12 is in the P1 gear position, the corresponding speed when there is no condensed water is Z1. If the P1 gear position remains unchanged, when more condensed water accumulates on the first heat exchanger 12, the warning speed Z2 will be reached. In the case of the warning speed Z2, the first fan 21 must run at a higher gear P2, so as to blow the condensed water out of the smoke exhaust channel 22 more smoothly. During normal operation, the air valve 8 is in a closed state. When the air valve 8 is closed, it is used to increase the static pressure. The air valve 8 is suddenly opened to quickly increase the dynamic pressure, thereby blowing out the condensed water on the first heat exchanger 12.

Claims

1. A control method for a kitchen air conditioning system, the kitchen air conditioning system comprising an air conditioning component (1) and an oil fume suction component (2), the air conditioning component (1) comprising a compressor (11), a first heat exchanger (12) and a second heat exchanger (13), the compressor (11), the first heat exchanger (12) and the second heat exchanger (13) being connected via a refrigerant pipeline (14), a four-way valve (15) being installed on the refrigerant pipeline (14), the oil fume suction component (2) comprising a first fan (21) and an exhaust passage (22) arranged at the rear end of the first fan, characterized in that: The first heat exchanger (12) is arranged in the smoke exhaust passage (22), an air valve (8) is installed at the outlet of the smoke exhaust passage, and a controller is also included for controlling the opening and closing of the air valve (8) by reading the rotation speed and gear position data of the first fan (21). A condensate collection device (3) and a spray or atomization device (4) are installed in the smoke exhaust passage (22). The condensate collection device (3) is used to collect condensate generated by the first heat exchanger (12), and the spray or atomization device (4) is used to spray or atomize the condensate collected by the condensate collection device (3) into the smoke exhaust passage (22). An indoor unit (6) is provided, the second heat exchanger (13) is installed in the indoor unit (6), an air inlet (61) and an air outlet (62) are provided on the indoor unit (6), the air inlet (61) is connected to the outside, and the air outlet (62) is connected to the kitchen room, the condensed water collection device (3) comprises a water receiving tray (31) and a liquid guide pipe (32), the water receiving tray (31) is arranged below the first heat exchanger (12), the liquid guide pipe (32) is connected between the water receiving tray (31) and the spray or atomization device (4), the motor used by the first fan (21) is a DC motor, and the control method comprises the following steps: 1) The system starts running; 2) The first fan operates at the preset gear position P1; 3) The controller determines whether the speed Z1 corresponding to the first fan gear position P1 is greater than the warning speed Z2; If Z1>Z2, the air valve is closed and the process goes to step 4); If Z1≤Z2, return to step 3); 4) The first fan operates at a higher gear P2; 5) The air valve is open; 6) The first fan continues to operate at gear position P1; 7) Whether to turn off the first fan; If so, the system stops running; If no, return to step 3).

2. The control method of the kitchen air conditioning system according to claim 1, characterized in that: The first heat exchanger (12) is arranged inclined relative to a vertical plane.

3. The control method of the kitchen air conditioning system according to claim 1, characterized in that: An oil fume purification device (5) is installed in the exhaust passage (22), and the oil fume purification device (5) is arranged at the front end of the first heat exchanger (12).

4. The control method of the kitchen air conditioning system according to claim 1, characterized in that: The internal unit (6) is installed in a corner of a kitchen upper cabinet (7), and the compressor (11) is integrated on the range fumes suction component (2) or on the internal unit (6).

5. The control method of the kitchen air conditioning system according to claim 1, characterized in that: A second fan (63) is installed in the internal unit (6) at a position close to the air outlet (62), and the second fan (63) is located between the second heat exchanger (13) and the air outlet (62).

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