Kitchen air conditioning system and control method thereof

Abstract

A kitchen air conditioning system, wherein a compressor, a first heat exchanger and a second heat exchanger of an air conditioning component are connected through a refrigerant pipeline, the fume suction component comprises a housing and a smoke exhaust channel and an air outlet channel arranged inside the housing, the first heat exchanger is arranged in the smoke exhaust channel, the second heat exchanger is arranged in the air outlet channel, the air outlet of the air outlet channel is fluidly connected with the kitchen room, the condensed water generated by the first heat exchanger or the second heat exchanger is heated by a heating device to form steam and is discharged through the smoke exhaust channel, the heating device has a heating body and a temperature sensor for detecting the temperature of the heating body, and the controller controls the heating device accordingly by reading the output value of the temperature sensor. When the system is working, the condensed water is heated by the heating device into water vapor and then discharged through the smoke exhaust channel, and the controller controls the state of the heating device accordingly by reading the output value of the temperature sensor, which ensures that the condensed water is fully evaporated and avoids the phenomenon of dry burning of the heating device, so that the system works more safely and reliably.

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, and the quality of the kitchen air environment directly affects the cooking experience. The kitchen is hot in summer and cold in winter, and there is a need for cooling and heating. For this reason, people have invented various kitchen air conditioners to cool the kitchen air in summer and provide warm air to the kitchen in winter to improve cooking comfort.

[0003] The basic form of the existing kitchen air conditioner is not much different from that of ordinary air conditioners. Generally, there are two forms. One is the split type of internal and external units, that is, the external unit is located outdoors and the internal unit is located indoors. The internal and external units each have a motor fan. The connection method of the kitchen air conditioner with split internal and external units needs to be connected through pipes, and holes need to be opened on the wall, which destroys the decoration. An external unit needs to be hung outdoors, which is difficult to install and the structure is not compact enough. The other is an integrated structure of the internal and external units. Although it can install the second heat exchanger and the first heat exchanger of the air conditioner indoors, it is necessary to destroy a larger area of ​​the wall to install the heat exhaust pipe of the first heat exchanger, which not only increases the difficulty of installation, but also affects the beauty of the room. In addition, due to the limited space in the kitchen, the volume of the kitchen air conditioner cannot be too large. Therefore, there are major problems in the heat dissipation of the kitchen air conditioner. If the kitchen air conditioner cannot dissipate heat in time during use, the energy efficiency of the air conditioner will be greatly reduced. However, the existing kitchen air conditioner and the range hood work independently of each other, and the two cannot be linked. The heat generated by the kitchen air conditioner cannot be discharged to the outside through the fan of the range hood. Therefore, how to discharge the heat generated by the kitchen air conditioner through the range hood has become a problem that people need to solve urgently.

[0004] Although there are products such as air-conditioning hoods on the market, that is, air-conditioning components are added to the range hood platform, which can realize all the functions of the range hood and the functions of the air conditioner at the same time. However, these air-conditioning hoods often simply merge the functions of the traditional air-conditioning indoor unit and the traditional range hood, and the air-conditioning outdoor unit still needs to be installed separately outdoors. This type of air-conditioning range hood is not integrated enough, and the installation is relatively cumbersome. Moreover, the pipe and line connections between the indoor and outdoor units of the air conditioner will also damage the wall. In addition, during the use of the air-conditioning hood, the evaporator of the air conditioner will produce condensed water, which is currently discharged to the outside through a water pipe. There is no other discharge method, and the condensed water has not been effectively utilized. Summary of the invention

[0005] The first technical problem to be solved by the present invention is to provide a kitchen air conditioning system in which air conditioning condensate is heated and evaporated and then discharged through a smoke exhaust channel and the heating device can be intelligently controlled.

[0006] The second technical problem to be solved by the present invention is to provide a control method for a kitchen air conditioning system capable of intelligently controlling a heating device in response to the above-mentioned prior art status.

[0007] 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, the oil fume suction component includes a casing and a smoke exhaust channel arranged inside the casing, and is characterized in that: an air outlet channel is also arranged inside the casing, the first heat exchanger is arranged in the smoke exhaust channel, the second heat exchanger is arranged in the air outlet channel, the air outlet of the air outlet channel is fluidly connected with the kitchen room, the condensed water generated by the first heat exchanger or the second heat exchanger is heated by the heating device to form steam energy and discharged through the smoke exhaust channel, the heating device has a heating body and a temperature sensor for detecting the temperature of the heating body, and also includes a controller for controlling the heating device accordingly by reading the output value of the temperature sensor.

[0008] Preferably, the first heat exchanger is a condenser, and the second heat exchanger is an evaporator. In this way, the system works in a cooling mode, and cold air is blown out of the air outlet.

[0009] In order to allow the air-conditioning condensate to be discharged smoothly through the smoke exhaust channel, a water receiving pan for collecting the condensate generated by the second heat exchanger is installed in the air outlet channel, and the heating device is installed inside the casing and located outside the smoke exhaust channel and the air outlet channel. The water outlet of the water receiving pan is connected to the water inlet of the heating device, and the steam outlet of the heating device is connected to the smoke exhaust channel.

[0010] The heating device can have a variety of structures. Preferably, the heating device includes a water tank, the water tank is provided with the water inlet and the steam outlet, the heating body is an electric heating tube installed in the water tank, the water outlet of the water receiving tray is connected to the water inlet end of the water pipe, the water outlet end of the water pipe passes through the water inlet and enters the water tank and is connected to the electric heating tube.

[0011] The electric heating pipe can be installed in a variety of ways. Preferably, the electric heating pipe is suspended vertically or obliquely in the water tank.

[0012] In order to make the electric heating tube have a better heating effect on the condensed water, a water groove is formed on the surface of the electric heating tube, the water pipe extends into the water storage tank and the water outlet end of the water pipe is connected to the water groove.

[0013] Further preferably, the fume extraction assembly further comprises a fume extraction fan arranged in the casing, and the steam generated by the heating device is discharged into the volute of the fume extraction fan through the steam outlet or into the exhaust channel downstream of the air outlet of the fume extraction fan.

[0014] In order to make the internal layout of the casing more reasonable, the range fumes fan is arranged at the lower part of the casing, the smoke exhaust channel and the air outlet channel are arranged at the upper part of the casing, and an installation cavity isolated from the smoke exhaust channel and the air outlet channel is also provided at the lower part of the casing, and the heating device and the compressor are installed in the installation cavity.

[0015] In order to enable the system to activate the corresponding smoke exhaust channel as needed, the smoke exhaust channel includes a first smoke exhaust channel and a second smoke exhaust channel, and a duct switching valve is installed at the entrance of the first smoke exhaust channel and the second smoke exhaust channel for switching one of the first smoke exhaust channel and the second smoke exhaust channel to be connected to the air outlet of the range fumes exhaust fan, and the first heat exchanger is arranged in the first smoke exhaust channel.

[0016] In order to prevent the oil smoke from contaminating the first heat exchanger, an electrostatic purification device is further installed in the first smoke exhaust channel, and the electrostatic purification device is arranged upstream of the first heat exchanger along the oil smoke flow path.

[0017] The first smoke exhaust channel and the second smoke exhaust channel may have different smoke exhaust modes. Preferably, the first smoke exhaust channel has a first smoke exhaust port, and the second smoke exhaust channel has a second smoke exhaust port, and the first smoke exhaust port and the second smoke exhaust port are independent of each other.

[0018] In order to make the air inlet and air outlet of the air outlet channel have different air inlet and air outlet modes respectively, the air inlet and air outlet of the air outlet channel are opened on the casing, the air inlet is fluidly connected with the kitchen room or with the kitchen room, and the air outlet is arranged on the front side or the top of the casing.

[0019] In order to make the air outlet blow out clean air, an air outlet fan and a filter are installed in the air outlet channel, and along the gas flow direction, the filter is arranged upstream of the second heat exchanger, and the air outlet fan is located downstream of the second heat exchanger.

[0020] In order to enable the system to work normally, a throttling device is installed on the refrigerant pipeline between the first heat exchanger and the second heat exchanger.

[0021] 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:

[0022] ① System startup;

[0023] ② The heating device is in a power-off state;

[0024] ③. Determine whether the air conditioner is turned on.

[0025] If it is turned on, go to step ④.

[0026] If not, return to step ②;

[0027] ④. Determine whether the temperature measured by the temperature sensor is higher than the set value.

[0028] If it is higher than the set value, the heating device will be powered off and enter step ⑤.

[0029] If it is not higher than the set value, the heating device is powered on and the process goes to step ⑤;

[0030] ⑤. Determine whether the air conditioning mode is turned off.

[0031] If it is off, the heating device is powered off and the process goes to step ⑥;

[0032] If not closed, return to step ④;

[0033] ⑥. System shutdown.

[0034] Compared with the prior art, the advantages of the present invention are: the kitchen air conditioning system installs the first heat exchanger in the smoke exhaust channel of the casing, and the oil smoke can take away the heat or cold of the first heat exchanger; the second heat exchanger is installed in the air outlet channel of the casing, and the air-conditioned air is blown into the kitchen from the air outlet of the air outlet channel; the condensed water is heated into water vapor by the heating device and then discharged through the smoke exhaust channel; in addition, the controller can control the state of the heating device accordingly by reading the output value of the temperature sensor, which can ensure that the condensed water is fully evaporated and avoid the dry burning of the heating device, making the system work safer and more reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a structural schematic diagram of an embodiment of the present invention;

[0036] Figure 2 A schematic diagram of the structure of a range hood according to an embodiment of the present invention;

[0037] Figure 3 is a schematic structural diagram of a heating device according to an embodiment of the present invention;

[0038] Figure 4 This is a schematic diagram of the structure of an electric heating tube according to an embodiment of the present invention;

[0039] Figure 5 It is a structural schematic diagram of the air outlet channel according to an embodiment of the present invention;

[0040] Figure 6 A control logic diagram of a system control method according to an embodiment of the present invention. DETAILED DESCRIPTION

[0041] The present invention is further described in detail below with reference to the accompanying drawings.

[0042] like Figure 1 and Figure 2 As shown, the kitchen air conditioning system of this embodiment includes an air conditioning component and a fume extraction component. The air conditioning component 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 throttling device 15 is installed on the refrigerant pipeline 14 between the first heat exchanger 12 and the second heat exchanger 13. A refrigerant flows through the refrigerant pipeline 14. Common refrigerants can be water, ethylene glycol, or propylene glycol, etc. The specific working principle of the air conditioning component is the same as that of the existing air conditioner, and will not be described in detail here.

[0043] The oil fume extraction assembly of this embodiment has a housing 20, in which an oil fume extraction fan 21 is arranged, and the oil fume extraction fan 21 is installed at the lower part of the housing 20. The upper part of the housing 20 is provided with a mutually isolated smoke exhaust passage 22 and an air outlet passage 23. Along the oil fume flow direction, the smoke exhaust passage 22 is arranged downstream of the air outlet of the oil fume extraction fan 21, and the smoke exhaust passage 22 and the air outlet passage 23 are both located above the oil fume extraction fan 21. Figure 2 The direction indicated by the middle arrow A is right, and the air outlet channel 23 is located on the right side of the smoke exhaust channel 22. A mounting cavity 28 is also provided at the lower part of the housing 20, and the mounting cavity 28 is isolated from the smoke exhaust channel 22 and the air outlet channel 23 and is located below the air outlet channel 23, and the compressor 11 is installed in the mounting cavity 28.

[0044] The smoke exhaust channel 22 of this embodiment includes a first smoke exhaust channel 221 and a second smoke exhaust channel 222. An air channel switching valve 6 for switching one of the first smoke exhaust channel 221 and the second smoke exhaust channel 222 to be connected to the air outlet of the oil fume exhaust fan 21 is installed at the entrance of the first smoke exhaust channel 221 and the second smoke exhaust channel 222. In this embodiment, a first heat exchanger 12 and an electrostatic purification device 7 are installed in the first smoke exhaust channel 221, and the electrostatic purification device 7 is arranged upstream of the first heat exchanger 12 along the oil fume flow direction, so as to prevent the oil fume from polluting the first heat exchanger 12.

[0045] In this embodiment, the first smoke exhaust channel 221 has a first smoke exhaust port 223 , and the second smoke exhaust channel 222 has a second smoke exhaust port 224 . The first smoke exhaust port 223 and the second smoke exhaust port 224 are independent of each other and are both connected to the smoke exhaust pipe 8 .

[0046] Combination Figure 5As shown, an air inlet 24 and an air outlet 25 are provided on the casing 20, and an air outlet channel 23 is formed between the air inlet 24 and the air outlet 25. In this embodiment, the second heat exchanger 13, the air outlet fan 26 and the filter 27 are installed in the air outlet channel 23, and along the gas flow direction, the air outlet fan 26 is located downstream of the second heat exchanger 13, and the filter 27 is located upstream of the second heat exchanger 13. The air inlet 24 is fluidly connected with the kitchen room or with the kitchen room, and the air outlet 25 can be set at the top of the casing 20 or at the front of the casing 20. When the air outlet is set at the top of the casing 20, the air outlet is connected with the kitchen room through an air duct (not shown in the figure), and when the air outlet is set at the front of the casing 20, the air conditioning air is directly blown from the air outlet to the kitchen room.

[0047] The first heat exchanger 12 of this embodiment is a condenser, and the second heat exchanger 13 is an evaporator. A water receiving tray 3 for collecting condensed water generated by the second heat exchanger 13 is installed in the air outlet channel 23. A heating device 4 is installed in the housing 20 and outside the smoke exhaust channel 22 and the air outlet channel 23. The heating device 4 is specifically installed in the installation cavity 28. The water outlet of the water receiving tray 3 is connected to the water inlet of the heating device 4. The steam generated by the heating device 4 is discharged into the volute 211 of the range fumes suction fan 21 through the steam outlet 412, and then enters the smoke exhaust channel 22 and is discharged into the smoke exhaust pipe 8 along with the smoke. In addition, the steam outlet 412 can also be directly connected to the smoke exhaust channel 22, that is, the steam discharged from the steam outlet 412 is directly discharged into the smoke exhaust channel 22 downstream of the air outlet of the range fumes suction fan 21.

[0048] like Figure 3 and Figure 4 As shown, the heating device 4 of this embodiment includes a water tank 41, which is provided with a water inlet 411 and a steam outlet 412. An electric heating pipe 42 is installed in the water tank 41, and the electric heating pipe 42 constitutes the heating body of the heating device 4. The water outlet 31 of the water receiving tray 3 is connected with the water inlet end of the water pipe 5, and the water outlet end of the water pipe 5 passes through the water inlet 411 and enters the water tank 41. The electric heating pipe 42 is suspended vertically or obliquely in the water tank 41, and a water groove 421 is formed on the surface of the electric heating pipe 42. The water pipe 5 extends into the water tank 41 and the water outlet end of the water pipe 5 is connected with the water groove 421. During operation, the condensed water generated by the second heat exchanger 13 flows out from the water receiving tray 3 to the electric heating tube 42, flows downward along the water trough 421, and is continuously heated, so that the condensed water evaporates into water vapor. The water vapor is drawn out from the steam outlet 412 and sprayed into the volute 211, mainly hitting the impeller to clean the impeller.

[0049] The electric heating tube 42 can be a round tube, a flat tube or other shapes. The groove width, groove depth, inclination angle, etc. of the surface groove can be designed to facilitate sufficient evaporation of water. The electric heating tube 42 can be placed vertically or obliquely, and can be a single tube or multiple tubes.

[0050] In addition, the heating device also includes a temperature sensor 43 for detecting the heating temperature of the electric heating tube 42 . The controller (not shown) reads the output value of the temperature sensor 43 and controls the heating device 4 accordingly.

[0051] like Figure 6 As shown, the control method of the kitchen air conditioning system is characterized by comprising the following steps:

[0052] ① System startup;

[0053] ② The heating device is in a power-off state;

[0054] ③. Determine whether the air conditioner is turned on.

[0055] If it is turned on, go to step ④.

[0056] If not, return to step ②;

[0057] ④. Determine whether the temperature measured by the temperature sensor is higher than the set value.

[0058] If it is higher than the set value, the heating device will be powered off and enter step ⑤.

[0059] If it is not higher than the set value, the heating device is powered on and the process goes to step ⑤;

[0060] ⑤. Determine whether the air conditioning mode is turned off.

[0061] If it is off, the heating device is powered off and the process goes to step ⑥;

[0062] If not closed, return to step ④;

[0063] ⑥. System shutdown.

[0064] The above set value is usually selected from 180℃~200℃.

[0065] After the kitchen air conditioning system adopts the above control method, it can ensure that the condensed water is fully evaporated and avoid the dry burning of the heating device, making the system work safer and more reliable.

[0066] The working principle of the kitchen air conditioning system is as follows:

[0067] The range hood and the air conditioner are both turned on. In the cooling mode, the first heat exchanger 12 is a condenser, and the second heat exchanger 13 is an evaporator. The oil smoke is discharged through the first exhaust channel 221. In addition, the oil smoke airflow passing over the surface of the first heat exchanger 12 can cool and dissipate the heat of the first heat exchanger 12, reduce the temperature of the refrigerant flowing through the first heat exchanger 12, thereby improving the heat exchange effect of the first heat exchanger 12, and further improving the energy efficiency of the air conditioner. At the same time, under the action of the air outlet fan 26, the cold air is sent into the kitchen room from the air outlet 25. The condensed water generated by the second heat exchanger 13 flows into the water storage tank 41 through the water receiving tray 3, is heated and evaporated by the electric heating tube 42, and the generated water vapor enters the volute 211 of the range hood fan 21 through the steam outlet 412, and then is discharged outward with the oil smoke, which not only realizes the effective discharge of condensed water, but also plays a role in cleaning the volute 211.

[0068] Only the range hood is turned on, and the oil smoke is discharged through the second smoke exhaust channel 222 .

[0069] In addition, the oil fume extraction component of the present invention is not limited to the structure of installing the oil fume extraction fan inside the casing. The oil fume extraction component can also adopt a non-powered structure, that is, the oil fume extraction component only retains the smoke collecting shell, and the oil fume extraction fan is placed outside the casing. For example, the oil fume extraction fan can be installed on the top of the public flue of the building.

[0070] The "fluid communication" referred to in the present invention refers to the spatial position relationship between two parts or parts (hereinafter collectively referred to as the first part and the second part respectively), that is, the fluid (gas, liquid or a mixture of the two) can flow from the first part along the flow path and / or be transported to the second part. The first part and the second part can be directly connected, or the first part and the second part can be indirectly connected through at least one third party. The third party can be a fluid channel such as a pipe, channel, duct, guide member, hole, groove, etc., or it can be a chamber allowing fluid to flow through, or a combination of the above.

Claims

1. A kitchen air conditioning system, comprising an air conditioning component and an oil fume suction component, wherein the air conditioning component comprises a compressor (11), a first heat exchanger (12) and a second heat exchanger (13), wherein the compressor (11), the first heat exchanger (12) and the second heat exchanger (13) are connected via a refrigerant pipeline (14), and the oil fume suction component comprises a housing (20) and an exhaust passage (22) arranged inside the housing, wherein: An air outlet passage (23) is also provided inside the casing (20); the first heat exchanger (12) is provided in the smoke exhaust passage (22); the second heat exchanger (13) is provided in the air outlet passage (23); a throttling device (15) is installed on the refrigerant pipeline (14) between the first heat exchanger (12) and the second heat exchanger (13); an air outlet (25) of the air outlet passage (23) is fluidically connected to the kitchen room; condensed water generated by the first heat exchanger (12) or the second heat exchanger (13) is heated by the heating device (4) to form steam energy which can be discharged through the smoke exhaust passage (22); The heating device (4) comprises a heating body and a temperature sensor (43) for detecting the temperature of the heating body, and also comprises a controller for controlling the heating device (4) accordingly by reading the output value of the temperature sensor (43); the first heat exchanger (12) is a condenser, the second heat exchanger (13) is an evaporator, a water receiving pan (3) for collecting condensed water generated by the second heat exchanger (13) is installed in the air outlet channel (23); the heating device (4) is installed inside the casing (20) and is located outside the smoke exhaust channel (22) and the air outlet channel (23); the water receiving pan (3) is The water outlet is connected to the water inlet of the heating device (4), the steam outlet of the heating device (4) is connected to the smoke exhaust channel (22), the heating device (4) comprises a water storage tank (41), the water storage tank (41) is provided with the water inlet (411) and the steam outlet (412), the heating body is an electric heating pipe (42) installed in the water storage tank (41), the water outlet (31) of the water receiving tray (3) is connected to the water inlet end of the water pipe (5), the water outlet end of the water pipe (5) passes through the water inlet (411) and enters the water storage tank (41) and is connected to the electric heating pipe The electric heating tube (42) is vertically or obliquely suspended in the water tank (41); a water groove (421) is formed on the surface of the electric heating tube (42); the water pipe (5) extends into the water tank (41) and the water outlet end of the water pipe (5) is connected to the water groove (421); the fume extraction component also includes a fume extraction fan (21) arranged in the casing (20); the steam generated by the heating device (4) is discharged into the volute (211) of the fume extraction fan (21) or into the exhaust channel (22) downstream of the air outlet of the fume extraction fan (21) through the steam outlet (412).

2. The kitchen air conditioning system according to claim 1, characterized in that: The fume extractor fan (21) is arranged at the lower part of the casing (20), the smoke exhaust passage (22) and the air outlet passage (23) are arranged at the upper part of the casing (20), and an installation cavity (28) isolated from the smoke exhaust passage (22) and the air outlet passage (23) is also arranged at the lower part of the casing (20), and the heating device (4) and the compressor (11) are installed in the installation cavity (28).

3. The kitchen air conditioning system according to claim 1, characterized in that: The smoke exhaust channel (22) comprises a first smoke exhaust channel (221) and a second smoke exhaust channel (222); an air duct switching valve (6) for switching one of the first smoke exhaust channel (221) and the second smoke exhaust channel (222) to be connected to an air outlet of the range fumes exhaust fan (21) is installed at the entrance of the first smoke exhaust channel (221) and the second smoke exhaust channel (222); and the first heat exchanger (12) is arranged in the first smoke exhaust channel (221).

4. The kitchen air conditioning system according to claim 3, characterized in that: An electrostatic purification device (7) is also installed in the first smoke exhaust channel (221), and along the oil smoke flow path, the electrostatic purification device (7) is arranged upstream of the first heat exchanger (12).

5. The kitchen air conditioning system according to claim 3, characterized in that: The first smoke exhaust channel (221) has a first smoke exhaust port (223), the second smoke exhaust channel (222) has a second smoke exhaust port (224), and the first smoke exhaust port (223) and the second smoke exhaust port (224) are independent of each other.

6. The kitchen air conditioning system according to claim 1, characterized in that: The housing (20) is provided with an air inlet (24) and an air outlet (25) of the air outlet passage (23); the air inlet (24) is fluidically connected to the inside of the kitchen or to the outside of the kitchen; and the air outlet (25) is arranged on the front of the housing (20) or on the top of the housing (20).

7. The kitchen air conditioning system according to claim 6, characterized in that: An air outlet fan (26) and a filter (27) are installed in the air outlet channel (23), and along the gas flow direction, the filter (27) is arranged upstream of the second heat exchanger (13), and the air outlet fan (26) is located downstream of the second heat exchanger (13).

8. A method for controlling a kitchen air conditioning system according to any one of claims 1 to 7, characterized in that The steps include: ① System startup; ② The heating device is in a power-off state; ③. Determine whether the air conditioner is turned on. If it is turned on, go to step ④. If not, return to step ②; ④. Determine whether the temperature measured by the temperature sensor is higher than the set value. If it is higher than the set value, the heating device will be powered off and enter step ⑤. If it is not higher than the set value, the heating device is powered on and the process goes to step ⑤; ⑤. Determine whether the air conditioning mode is turned off. If it is off, the heating device is powered off and the process goes to step ⑥; If not closed, return to step ④; ⑥. System shutdown.

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