Kitchen air conditioning system

Abstract

The utility model discloses a kitchen air conditioning system which comprises a fresh air system, the fresh air system comprises a main machine, a fresh air input end is arranged on the main machine, a first air inlet pipe is arranged on the fresh air input end, and the kitchen air conditioning system further comprises a three-way valve arranged at the upstream position of the first air inlet pipe. A flow channel, from the input end of the three-way valve to the output end of the first three-way valve, of the inner side of the three-way valve forms a first air channel, a flow channel, from the input end of the three-way valve to the output end of the second three-way valve, of the inner side of the three-way valve forms a second air channel, and a valve block capable of switching the first air channel and the second air channel is arranged on the inner side of the three-way valve. The valve plate can be located at the following two positions: a first position, the valve plate is located at the output end of the second three-way valve, and the first air duct is communicated, so that the kitchen air conditioning system is in a fresh air mode; and at the second position, the valve plate is located at the output end of the first three-way valve, the second air duct is communicated, and the kitchen air conditioning system is in an air supplementing mode.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of kitchen appliances, especially a kitchen air conditioning system. BACKGROUND

[0002] The kitchen is the place where the most harmful pollutants are produced in the family. The oil fume generated during cooking inevitably escapes and diffuses into the kitchen environment due to the influence of external airflow. In order to improve indoor air quality, users install a fresh air system in the kitchen. The kitchen fresh air system introduces outdoor air into the room after filtration and discharges indoor pollution to the outside.

[0003] A kitchen air conditioning system disclosed in Chinese Utility Model Patent No. 202020808852.4 has an outdoor air inlet, an indoor return air inlet, a first air outlet, and a second air outlet on the inner machine of the air conditioning assembly. The fan assembly inside the inner machine has a first air duct and a second air duct that are independent of each other. The outdoor air inlet is connected to the kitchen indoor through the first air duct and the first air outlet. The indoor return air inlet is connected to the second air outlet through the second air duct. The first heat exchanger is arranged between the first air duct outlet and the first air outlet. The second heat exchanger is arranged between the second air duct outlet and the second air outlet. The machine shell of the oil smoke suction assembly has an air outlet channel that is isolated from the smoke exhaust channel. The first air outlet is connected to the air conditioner air outlet on the machine shell through the air outlet channel. This kitchen air conditioning system can exhaust air from the machine shell of the oil smoke suction machine. Outdoor fresh air enters the first air duct and is supplemented into the kitchen after passing through the first heat exchanger. Indoor return air enters the second air duct and is discharged after passing through the second heat exchanger.

[0004] The kitchen space is generally small. During cooking, the oil smoke suction machine continuously discharges indoor air to the outside. The air volume of the oil smoke suction machine on the market is getting larger and larger, and the working air volume also increases (generally ≥720 m 3 / h). The exhaust volume of the oil smoke suction machine is much larger than the fresh air volume of the household fresh air machine (generally less than 350 m 3 / h). Therefore, opening the fresh air during the cooking period cannot improve the indoor air quality well.

[0005] When the fresh air system is working, the doors and windows are usually closed. With the oil smoke suction machine discharging air to the outside, a large negative pressure is generated in the room, which reduces the smoke suction effect of the oil smoke suction machine and causes the sewer to smell. To solve the problem of negative pressure, the doors and windows must be opened for ventilation, which affects the user's experience.

[0006] In addition, a large amount of oil fume is generated during cooking, and oil fume particles inevitably escape, enter the fresh air system with the airflow, and pollute the air supply pipeline, adhere to and even block the heat exchange core, thereby reducing the service life of the fresh air system, breeding bacteria, producing odor, increasing air resistance and noise, and affecting the normal operation and service life of the fresh air system. Therefore, frequent cleaning and maintenance are required, resulting in high labor intensity and use cost. Practical new type content

[0007] The technical problem to be solved by the utility model is to solve the problems of negative pressure extraction of the range hood and oil fume pollution of the fresh air system.

[0008] The utility model provides a kitchen air conditioning system, which can solve the problems of negative pressure extraction of the range hood and oil fume pollution of the fresh air system.

[0009] The utility model provides a kitchen air conditioning system, which can solve the problems of negative pressure extraction of the range hood and oil fume pollution of the fresh air system.

[0010] The utility model provides a kitchen air conditioning system, which can solve the problems of negative pressure extraction of the range hood and oil fume pollution of the fresh air system.

[0011] The utility model provides a kitchen air conditioning system, which can solve the problems of negative pressure extraction of the range hood and oil fume pollution of the fresh air system.

[0012] Further, the fresh air system further comprises an air outlet for guiding the air from the second three-way valve output end to the indoor space, the air outlet is arranged at the second three-way valve output end, the air outlet comprises a housing, a ring-shaped air outlet output end is formed on the peripheral wall of the housing, so that the air flow is evenly blown to the surrounding, and the air supply without dead angle is realized.

[0013] Further, the fresh air system further comprises an air outlet for guiding the air from the second three-way valve output end to the indoor space, the air outlet is arranged at the second three-way valve output end, the air outlet comprises a housing, a ring-shaped air outlet output end is formed on the peripheral wall of the housing, so that the air flow is evenly blown to the surrounding, and the air supply without dead angle is realized.

[0014] Preferably, the inclination angles of the two directions are θ, and 3°≤θ≤15° is satisfied.

[0015] Further, the air outlet further comprises an air outlet input end, the air outlet input end is arranged corresponding to the second three-way valve output end, the flow area of the air outlet input end is S1, the flow area of the air outlet output end is S2, and S2<S1 is satisfied, so that the air flow of the output end has sufficient flow rate.

[0016] In order to increase the air supply amount, the inner side of the second three-way valve output end is provided with an air supply fan for increasing the air supply amount.

[0017] In order to send the fresh air into the kitchen, the main machine is provided with a fresh air output end, the fresh air output end is in fluid communication with the fresh air input end, the fresh air system is further provided with a first air outlet pipe, one end of the first air outlet pipe is connected with the fresh air output end, and the other end of the first air outlet pipe is arranged towards the lower side of the ceiling.

[0018] In order to realize the exhaust function, the main machine is further provided with an exhaust input end, the fresh air system is further provided with a second air inlet pipe for guiding the indoor air to the main machine, one end of the second air inlet pipe is arranged corresponding to the indoor space, and the other end of the second air inlet pipe is connected with the exhaust input end of the main machine.

[0019] In order to detect the concentration of indoor oil fume, the first sensor capable of detecting the concentration of oil fume is arranged on the second air inlet pipe.

[0020] In order to detect the air quality in the room, the second sensor capable of detecting the air quality is arranged on the second air inlet pipe.

[0021] In order to detect the concentration of oil fume at the air inlet end of the range hood, the kitchen air conditioning system further comprises a range hood, and the range hood comprises a fan frame, and the inside of the fan frame is provided with a third sensor capable of detecting the concentration of oil fume.

[0022] Compared with the prior art, the utility model has the advantages that the three-way valve is arranged, the valve plate capable of switching the first air duct and the second air duct is arranged in the three-way valve, the kitchen is supplemented with air through the second air duct during cooking, the problem of negative pressure extraction of the range hood is solved, the oil fume gas is avoided to enter the fresh air system, during the non-cooking period, the fresh air mode is switched to, the fresh air function is realized, and the adverse effect of the oil fume on the fresh air system is avoided. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 It is a schematic view of the three-way valve of the kitchen air conditioning system of the utility model embodiment in the air supplementing mode;

[0024] Figure 2 It is a schematic view of the three-way valve of the kitchen air conditioning system of the utility model embodiment in the fresh air mode;

[0025] Figure 3 It is an installation schematic view of the kitchen air conditioning system of the utility model embodiment in the air supplementing mode;

[0026] Figure 4 It is Figure 3 The enlarged view of the part I;

[0027] Figure 5 It is an installation schematic view of the kitchen air conditioning system of the utility model embodiment in the fresh air mode;

[0028] Figure 6 It is a schematic view of the air outlet piece of the kitchen air conditioning system of the utility model embodiment. DETAILED DESCRIPTION

[0029] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0030] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Since the embodiments disclosed in this utility model can be arranged in different directions, these terms indicating direction are only for illustration and should not be regarded as limitations. For example, "upper" and "lower" are not necessarily limited to directions opposite to or consistent with the direction of gravity. In addition, features defined with "first" and "second" may explicitly or implicitly include one or more of such features.

[0031] See Figure 3 and Figure 5 A kitchen air conditioning system, comprising a fresh air system 100 and a range hood 9.

[0032] See Figures 1-4 The fresh air system 100 includes a main unit 1 installed above the ceiling 700. The main unit 1 may include a commonly used total heat exchanger to exchange heat with the incoming air. The main unit 1 is provided with a fresh air inlet 11, and a first air inlet duct 2 is provided on the fresh air inlet 11. The fresh air system 100 also includes a three-way valve 3 located upstream of the first air inlet duct 2. The three-way valve 3 includes a three-way valve inlet 31 that can introduce fresh air from the outside, a first three-way valve outlet 32 ​​that directs the introduced fresh air to the first air inlet duct 2, and a second three-way valve outlet 33 that directs the introduced fresh air into the room.

[0033] The inner side of the three-way valve 3 has a flow channel from the three-way valve inlet 31 to the first three-way valve outlet 32, forming a first air duct. The inner side of the three-way valve 3 has a flow channel from the three-way valve inlet 31 to the second three-way valve outlet 33, forming a second air duct. The inner side of the three-way valve 3 is provided with a valve plate 34 that can switch between the first and second air ducts. When the valve plate 34 is switched to the second three-way valve outlet 33, the second air duct is closed, allowing the first air duct to circulate and achieving a fresh air mode. When the valve plate 34 is switched to the first three-way valve outlet 32, the first air duct is closed, allowing the second air duct to circulate and achieving a makeup air mode.

[0034] The inner side of the second three-way valve output end 33 is provided with a make-up air fan 5 for increasing the amount of make-up air. A protective net 500 capable of dispersing the make-up air and playing a safety protection role is arranged at the port of the second three-way valve output end 33 downstream of the make-up air fan 5.

[0035] Referring to Figures 3-4 and Figure 6 , the fresh air system 100 further comprises an air outlet 4 for guiding the air from the second three-way valve output end 33 to the indoor. The air outlet 4 is arranged at the second three-way valve output end 33, and the air outlet 4 comprises a shell 41, a ring-shaped air outlet output end 42 is formed on the peripheral wall of the shell 41, serving as a make-up air outlet, and part of the bottom surface 411 of the shell 41 constitutes the lower edge of the air outlet output end 42. The air outlet output end 42 is located below the ceiling 700, and the projection of the air outlet output end 42 on the surface of the wall 200 on which the range hood 9 is installed (normally, the surface of the wall 200 is a vertical plane) is inclined downward at an angle of θ with respect to the horizontal direction from the bottom surface 411 of the shell 41 to the middle direction, and the air outlet output end 42 is inclined inward at an angle of θ with respect to the vertical direction from the bottom to the top, and the inclination angles in the two directions are both θ, thereby forming a certain guiding effect on the air flow. To ensure that the make-up air flow can flow along the ceiling 700, preferably, 3°≤θ≤15°. To achieve better make-up air effect, the air outlet output end 42 can be designed as a grid structure, or a uniform air distribution micro-porous structure, etc.

[0036] Thus, the air outlet 4 adopts a 360° no-dead-angle inclined air outlet structure, and the uniformity of the air outlet is better, and no-dead-angle make-up air can be achieved. Because the air outlet output end 42 has an upward inclination angle, the make-up air flow closely flows along the ceiling 700, forms a Coanda effect, better drives the indoor air flow, and forms an air curtain between the ceiling 700 and the cooking fume, thereby reducing the accumulation effect of part of the escaped fume on the ceiling 700, reducing the deposition of the fume on the ceiling or the ceiling, avoiding the potential harm to the user's health caused by the greasy and deposited fume due to long-term use.

[0037] The lateral air outlet structure of the air outlet 4 makes the flow field in the kitchen more reasonable, reduces the influence of the make-up air flow on the fume suction effect of the range hood, avoids the adverse influence of the make-up air flow on the gas stove, and reduces the energy consumption of the kitchen; at the same time, the influence of the make-up air flow on the user is also eliminated. The air outlet scheme reduces the requirements for the position of the make-up air outlet, reduces many installation restrictions, and through scientific and reasonable organization of the make-up air flow in the kitchen, the kitchen environment can be effectively improved, the kitchen is more healthy, green, energy-saving, and environmentally friendly, and the user experience is greatly improved.

[0038] The air outlet 4 further comprises an air outlet input end 43, which is an air inlet and is arranged corresponding to the second three-way valve output end 33, and is formed at the top of the shell 41 as shown in the figure. In order to strengthen the effect of the Coanda air supplement and make the air flow at the air outlet output end 42 have a certain flow rate, the flow area of the air outlet input end 43 is S1 (the area surrounded by the edge on the side facing the air flow), the flow area of the air outlet output end 42 is S2 (the area surrounded by the edge on the side from which the air flow flows out), and the flow area S2 of the air outlet output end 42 is smaller than the flow area S1 of the air outlet input end 43. Preferably, S1 = (1.2-2.0)*S2, that is, S2 = S1*1 / (1.2-2.0). The air speed at the air outlet output end 42 is V, and preferably, 1.5 m / s≤V≤4.0 m / s.

[0039] In order to avoid the air supplement speed being too large, causing too large interference to the overall flow field of the kitchen and too large air flow noise and other adverse effects, the S2 area can be designed according to the maximum air supplement amount Q, and the preferred size is: Q / (4*3600)≤S2≤Q / (1.5*3600), wherein the unit of Q is m 3 / h.

[0040] Referring to Figures 1-2 , the main machine 1 is provided with a fresh air output end 12, which is in fluid communication with the fresh air input end 11. The fresh air system 100 is further provided with a first air outlet pipe 6 capable of discharging fresh air to the indoor, one end of the first air outlet pipe 6 is connected with the fresh air output end 12, and the other end of the first air outlet pipe 6 is arranged towards the indoor below the ceiling 700.

[0041] The main machine 1 is further provided with an exhaust air input end 13, and the fresh air system 100 is further provided with a second air inlet pipe 7 capable of guiding indoor air to the main machine 1, one end of the second air inlet pipe 7 is arranged corresponding to the indoor, and the other end of the second air inlet pipe 7 is connected with the exhaust air input end 13 on the main machine 1. The second air inlet pipe 7 is provided with a first sensor 8 capable of detecting the concentration of oil fume and a second sensor 10 capable of detecting the air quality, so as to be capable of detecting the concentration of oil fume and the air quality of the indoor return air in real time.

[0042] The main machine 1 is further provided with an exhaust air output end 14, which is in fluid communication with the exhaust air input end 13. The fresh air system 100 further comprises a second air outlet pipe 200 capable of discharging indoor air to the outdoor, one end of the second air outlet pipe 200 is connected with the exhaust air output end 14, and the other end of the second air outlet pipe 200 leads to the outdoor.

[0043] Referring to Figures 3-5The third inlet pipe 800 extending to the outdoor is arranged on the input end 31 of the three-way valve, and the rainproof cap 300 is arranged at the end of the third inlet pipe 800 and the second outlet pipe 200 located outdoors to prevent rainwater from entering the indoor. The filter screen 400 is arranged at the third inlet pipe 800 to coarsely filter the outdoor air entering.

[0044] The temperature adjusting device is further arranged on the second air duct in the three-way valve 3, so that the air supplementing in winter is heated and the air supplementing in summer is cooled.

[0045] The range hood 9 comprises a fan frame 91, and the third sensor 600 capable of detecting the oil fume concentration is arranged in the fan frame 91.

[0046] The linkage process of the fresh air system 100 and the range hood 9 is as follows:

[0047] During cooking:

[0048] 1) The range hood 9 is started;

[0049] 2) The fresh air mode is automatically closed;

[0050] 3) The valve piece 34 is switched to the first three-way valve output end 32, the first air duct is closed, the second air duct is communicated, and the air supplementing mode is entered;

[0051] 4) The air supplementing fan 5 is started;

[0052] 5) The rotating speed of the air supplementing fan 5 is automatically adjusted according to the gear of the range hood 9;

[0053] 6) The air volume of the range hood 9 and the air volume of the air supplementing fan 5 are matched;

[0054] 7) The micro-negative pressure of the kitchen is realized to prevent the oil fume from being spread;

[0055] 8) The range hood 9 is delayed to be turned off when the cooking is finished;

[0056] 9) The third sensor 600 on the range hood 9 detects the oil fume concentration value;

[0057] 10) Until the third sensor 600 detects that the oil fume concentration value is less than the set threshold value, the range hood 9 stops working.

[0058] During non-cooking:

[0059] 1) The fresh air mode is entered by default (the valve piece 34 is switched to the second three-way valve output end 33, the second air duct is closed, and the first air duct is communicated;

[0060] 2) The second sensor 10 on the second inlet pipe 7 detects whether the air quality is qualified? If yes, the fresh air system enters the standby state, and if no, step 3) is entered.

[0061] 3) Turn on fresh air mode;

[0062] 4) The first sensor 8 on the second air inlet pipe 7 detects whether the oil smoke concentration is less than the threshold value;

[0063] 5) If the first sensor 8 detects that the oil smoke concentration is greater than the threshold value, turn off the fresh air and switch to the make-up air mode;

[0064] 6) Turn on the range hood 9;

[0065] 7) Until the first sensor 8 detects that the oil smoke concentration is less than the threshold value, return to step 2).

[0066] The "fluid communication" referred to in the utility model refers to the spatial positional relationship between two components or parts (hereinafter collectively referred to as the first part, the second part), i.e. the fluid (gas, liquid or mixture of the two) can flow or / and be transported from the first part to the second part along the flow path, which can be directly connected between the first part and the second part, or indirectly connected between the first part and the second part through at least one third party, which can be a fluid passage such as a pipeline, a channel, a conduit, a flow guide, a hole, a groove, etc., or a chamber allowing fluid to flow or a combination thereof.

Claims

1. A kitchen air conditioning system comprising a fresh air system (100), the fresh air system (100) comprising a main machine (1) arranged above a ceiling (700), the main machine (1) being provided with a fresh air input end (11), the fresh air input end (11) being provided with a first air inlet pipe (2), characterized in that: The kitchen air conditioning system further comprises a three-way valve (3) arranged upstream of the first air inlet pipe (2), the three-way valve (3) comprising a three-way valve input end (31) capable of introducing fresh air from the outside, a first three-way valve output end (32) guiding the introduced fresh air to the first air inlet pipe (2), and a second three-way valve output end (33) guiding the introduced fresh air to the indoor, the flow passage of the inner side of the three-way valve (3) from the three-way valve input end (31) to the first three-way valve output end (32) constituting a first air duct, the flow passage of the inner side of the three-way valve (3) from the three-way valve input end (31) to the second three-way valve output end (33) constituting a second air duct, the inner side of the three-way valve (3) being provided with a valve piece (34) capable of switching the first air duct and the second air duct, the valve piece (34) being capable of being in the following two positions: A first position, the valve piece (34) is at the second three-way valve output end (33), the first air duct is communicated, so that the kitchen air conditioning system is in fresh air mode; A second position, the valve piece (34) is at the first three-way valve output end (32), the second air duct is communicated, so that the kitchen air conditioning system is in air supplementing mode.

2. The kitchen air conditioning system of claim 1, wherein: The fresh air system (100) further comprises an air outlet piece (4) for guiding the air of the second three-way valve output end (33) to the indoor, the air outlet piece (4) is arranged at the second three-way valve output end (33), the air outlet piece (4) comprises a shell (41), and a ring-shaped air outlet piece output end (42) is formed on the peripheral wall of the shell (41).

3. The kitchen air conditioning system of claim 1, wherein: The fresh air system (100) further comprises an air outlet piece (4) for guiding the air of the second three-way valve output end (33) to the indoor, the air outlet piece (4) is arranged at the second three-way valve output end (33), the air outlet piece (4) comprises a shell (41), and an air outlet piece output end (42) is formed on the peripheral wall of the shell (41), part of the bottom surface (411) of the shell (41) constitutes the lower edge of the air outlet piece output end (42), the air outlet piece output end (42) is located below the suspended ceiling (700), the projection of the air outlet piece output end (42) on the vertical plane is gradually inclined downward from the air outlet piece output end (42) to the middle of the bottom surface (411) of the shell (41), and the air outlet piece output end (42) is gradually inclined to the middle from bottom to top.

4. The kitchen air conditioning system of claim 3, wherein: The inclination angles of the two directions are both θ, and 3°≤θ≤15° is satisfied.

5. The kitchen air conditioning system according to any one of claims 2 to 4, characterized in that: The air outlet piece (4) further comprises an air outlet piece input end (43) corresponding to the second three-way valve output end (33), the flow area of the air outlet piece input end (43) is S1, the flow area of the air outlet piece output end (42) is S2, and S2 6. The kitchen air conditioning system of claim 1, wherein: The inner side of the second three-way valve output end (33) is provided with an air supplementing fan (5) for increasing the air supplementing amount.

7. The kitchen air conditioning system of claim 1, wherein: The host (1) is provided with a fresh air output end (12), the fresh air output end (12) is in fluid communication with the fresh air input end (11), the fresh air system (100) is further provided with a first air outlet pipe (6), one end of the first air outlet pipe (6) is connected with the fresh air output end (12), the other end of the first air outlet pipe (6) is arranged towards the lower side of the ceiling (700).

8. The kitchen air conditioning system of claim 1, wherein: The host (1) is further provided with an exhaust air input end (13), the fresh air system (100) is further provided with a second air inlet pipe (7) capable of guiding indoor air to the host (1), one end of the second air inlet pipe (7) is arranged corresponding to the indoor environment, the other end of the second air inlet pipe (7) is connected with the exhaust air input end (13) on the host (1).

9. The kitchen air conditioning system of claim 8, wherein: The second air inlet pipe (7) is provided with a first sensor (8) capable of detecting the concentration of oil fume.

10. The kitchen air conditioning system of claim 8, wherein: The second air inlet pipe (7) is provided with a second sensor (10) capable of detecting air quality.

11. The kitchen air conditioning system of claim 1, wherein: The kitchen air conditioning system further comprises an extractor hood (9), the extractor hood (9) comprises a fan frame (91), the inside of the fan frame (91) is provided with a third sensor (600) capable of detecting the concentration of oil fume.

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