JP2005233473A - Air treating device for kitchen - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an air treating device for a kitchen capable of performing stable exhaust gas treatment by securing sufficient dehumidifying capacity and suppressing the closing of a cooler due to frosting. <P>SOLUTION: This cooking apparatus S comprises an air treating part 1 for treating exhaust gases generated from a flyer 5 cooking food materials in the kitchen. The apparatus also comprises a cooling device 6 forming a refrigerant circuit by annularly connecting, sequentially, a compressor 10, a condenser 11, a heater 14, an expansion valve 46, and the cooler 13 to each other through pipes and a dehumidifying duct 17 formed above the flyer 5 and allowing the exhaust gases from the flyer 5 to flow therein. The cooler 13 and the heater 14 are disposed in the dehumidifying duct 17, and the exhaust gases from the flyer 5 is allowed to flow to the dehumidifying duct 17 by a blower 7. A steam pressure regulating valve 49 for maintaining the evaporation temperature of a refrigerant in the cooler 13 at a specified value or higher is installed in the refrigerant circuit. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a kitchen air treatment device for treating exhaust gas generated from cooking means that is installed in a kitchen such as a restaurant and cooks ingredients.

  Traditionally, kitchens such as hotels, restaurants, and fast food restaurants have been cooking food using a fryer or griddle. Steam or steam (hereinafter referred to as exhaust) containing a lot of moisture and odor rises or scatters from these cookers. Conventionally, a hood is placed above the cooker and is generated from the cooker. Exhaust gas was collected in a hood by a blower and discharged to the outside (see, for example, Patent Document 1). Then, air was supplied from the outside to ventilate the kitchen to maintain the worker's working environment.

  However, especially in restaurants and fast food restaurants that open in underground shopping malls, it may be difficult to discharge the exhaust from the cooker to the outside due to the structure of the building. In such a case, the kitchen is filled with moisture and odors. However, there was a problem that the working environment deteriorated.

Therefore, conventionally, a kitchen air treatment apparatus having a dehumidifying means for removing moisture in the exhaust gas generated from the cooker has been developed. This kitchen air treatment device is installed above the cooker, supplies exhaust from the cooker to a cooler constituting dehumidification means, and discharges the exhaust after dehumidification into the kitchen.
JP-A-8-94140

  The conventional kitchen air treatment apparatus as described above uses a cooling device in which a compressor circuit, a condenser, a decompression device, and a fin tube type cooler are sequentially connected in an annular manner as a dehumidifying means. Yes. As with the cooling device used in a general air conditioner, the cooling temperature of the refrigerant in the cooler is set to + 10 ° C., for example, and the interval between the plurality of fins provided in the cooler is relatively narrow, for example, 2 mm or less. In the case of setting in the above, there is a problem that the ability to dehumidify the moisture in the exhaust is insufficient and sufficient exhaust treatment cannot be performed. In particular, when a deodorizing filter or the like is provided as a deodorizing means after the dehumidifying means, exhaust containing moisture enters the deodorizing filter and accumulates moisture, resulting in deterioration of deodorizing performance and generation of bacteria such as mold. There is a problem that invites.

  Therefore, in order to ensure a sufficient dehumidifying capacity, it is conceivable to increase the interval between the fins of the cooler and lower the evaporation temperature of the refrigerant in the cooler. However, in such a case, there has been a problem that the evaporation temperature of the refrigerant in the cooler rapidly decreases due to fluctuations in the heat load due to cooking, and the circulation duct is narrowed due to freezing of the dehumidified water. Such narrowing of the circulation duct leads to a decrease in the exhaust air volume, and there is a problem that exhaust gas that cannot be sucked into the air treatment device leaks into the kitchen.

  The air processing apparatus for kitchen of the present invention processes exhaust generated from cooking means for cooking food in the kitchen, and a compressor, a condenser, a heater, a decompression device, and a cooler are sequentially connected in a circular pipe connection. And a cooling device having a refrigerant circuit and an air processing duct that is arranged above the cooking means and into which exhaust gas from the cooking means flows, and a cooler and a heater are disposed in the air processing duct. Then, the exhaust air from the cooking means is caused to flow into the air processing duct by the blower means, and an evaporating pressure adjusting valve for maintaining the evaporating temperature of the refrigerant in the cooler at a predetermined value or more is provided in the refrigerant circuit.

  According to a second aspect of the present invention, there is provided a kitchen air treatment apparatus according to the first aspect, further comprising a control means for performing ON / OFF control of the operation of the compressor based on the temperature of the cooler.

  A kitchen air treatment device according to a third aspect of the present invention is the rest in which, in the above invention, the control means stops the compressor and operates only the air blowing means when the ON / OFF cycle of the compressor reaches a predetermined number of times. Transition to mode.

  According to a fourth aspect of the present invention, in the above-described invention, the control means includes a means for switching whether or not to shift to the rest mode.

  A kitchen air treatment device according to a fifth aspect of the present invention is the dehumidifying device according to the third or fourth aspect of the present invention, wherein the control means turns on and off the operation of the compressor from the rest mode based on a rise in the temperature of the cooler. Return to operation mode.

  According to a sixth aspect of the present invention, in the above-described invention, the control means includes a means for switching whether or not to shift to the dehumidifying operation mode.

  According to the present invention, in a kitchen air treatment device that processes exhaust gas generated from cooking means for cooking food in a kitchen, a compressor, a condenser, a heater, a decompression device, and a cooler are sequentially connected in a circular pipe connection. A cooling device having a refrigerant circuit, and an air processing duct that is configured above the cooking means and into which exhaust gas from the cooking means flows, and a cooler and a heater are disposed in the air processing duct; Since the exhaust air from the cooking means is caused to flow to the air processing duct by the blower means and the evaporation pressure adjusting valve for maintaining the evaporation temperature of the refrigerant in the cooler at a predetermined value or more is provided in the refrigerant circuit, the outside air temperature and cooking Regardless of the change in the heat load from the means, the evaporation temperature of the refrigerant in the cooler can be maintained at a predetermined value or higher.

  Thereby, the cooler is brought into a supercooled state due to a decrease in the heat load, and the inconvenience of causing frost blockage in the air treatment duct can be avoided in advance. Therefore, cooking exhaust can be circulated stably in the air treatment duct, and a stable dehumidifying ability can be exhibited.

  In particular, according to the second aspect of the present invention, there is provided control means for performing ON / OFF control of the operation of the compressor based on the temperature of the cooler in which the evaporation temperature of the refrigerant is maintained at a predetermined value or higher by the evaporation pressure adjusting valve. Therefore, the temperature of the cooler can be kept constant. Further, frost blockage in the air treatment duct due to the supercooled state of the cooler can be suppressed, and a stable dehumidifying ability can be ensured.

  According to the invention of claim 3, in the above invention, when the ON-OFF cycle of the compressor reaches a predetermined number of times, the control means stops the compressor and shifts to a rest mode in which only the air blowing means is operated. Therefore, in a state where there is no heat load, the operation of the compressor can be stopped without cooking and the energy saving operation can be executed.

  According to invention of Claim 4, in the said invention, since the control means was provided with the means to switch whether it transfers to rest mode, it can select the presence or absence of rest mode according to a user's use condition. It becomes possible to improve convenience.

  According to the invention of claim 5, in the invention of claim 3 or claim 4, the control means returns from the rest mode to the dehumidifying operation mode in which the operation of the compressor is turned on and off based on the rise in the temperature of the cooler. Therefore, when the heat load increases due to the start of cooking by the cooking means, it becomes possible to perform dehumidification by the cooler without performing an operation for instructing the operation of the compressor by the user. Thereby, complicated apparatus operation can be avoided and improvement in usability and smooth dehumidification operation can be realized.

  According to invention of Claim 6, in the said invention, since the control means was provided with the means to switch whether it transfers to dehumidification operation mode, according to a user's use condition, it is from a rest mode to dehumidification operation mode. It becomes possible to select the migration, and the convenience is improved.

  The present invention has been made in order to solve the conventional technical problems, and is a kitchen that can ensure a sufficient dehumidifying capacity, suppress frost blockage in a cooler, and perform stable exhaust processing. An air treatment apparatus for use is provided. Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a vertical side view of a cooking apparatus S provided with an air treatment unit 1 as a kitchen air treatment apparatus of the present invention, and FIG. 2 is a vertical side view of the cooking apparatus S of FIG. 1 provided with a hot water washing mechanism.

  The cooking device S is installed in a kitchen of a hotel, restaurant, fast food store, etc., and comprises a substantially vertically long exterior frame 4 and a fryer 5 as cooking means, a cooling device 6 and a sirocco fan which will be described in detail later. A blower 7 as a blowing means, a deodorizer 9 as a deodorizing means, and the like are assembled to form an integral unit.

  The approximate center of the exterior frame 4 is a work area 4C that is recessed on the back side and the front and left and right surfaces are open. The upper surface of the work area 4C is a hood portion 4D that has a high center and is substantially curved. The fryer 5 is arranged at the lower part of the work area 4C and has a height near the operator's waist. The fryer 5 is a metal fryer 5A having an opening on the top surface that has a capacity that can accommodate all the ingredients such as potatoes, and the eddy current flows through the fryer 5A to generate heat to heat the oil in the fryer 5A. For example, an IH heating device. In addition, a machine room 4A is formed in the lower part of the exterior frame 4, and a compressor 10, a condenser 11, a condenser blower 8, and the like constituting the cooling device 6 are installed in the machine room 4A. The compressor 10 and the condenser blower 8 are connected to a control device 50 described later in detail.

  On the other hand, a heat insulating box 12 is attached to the upper side of the upper part 4B of the outer frame 4 with a predetermined distance from the back surface part 4E forming the back surface of the outer frame 4. 12 and between the back surface portion 4E and the back plate 4F formed from the lower end of the heat insulating box 12 to the machine room 4A, the upper part is opened upward and the inside of the machine room 4A. A series of backside ducts 15 are formed in communication with each other. For this reason, the waste heat in the machine room 4 </ b> A can rise up the back duct 15 and be discharged to the outside from above the cooking apparatus S. Moreover, the waste heat discharged | emitted from the upper direction of the cooking apparatus S can be normally discharged | emitted from the general ventilation opening provided in the ceiling surface of a kitchen, etc. outside a kitchen.

  The heat insulation box 12 opens forward and downward, and a partition plate 16 is provided in the heat insulation box 12 to divide the heat insulation box 12 forward and backward. Thereby, a dehumidifying duct 17 is formed behind the partition plate 16, and a deodorizing duct 18 is formed in front of the partition plate 16, and the dehumidifying duct 17 and the deodorizing duct 18 allow air to flow. A processing duct is constructed. In addition, this partition plate 16 shall be formed open in the upper part of the heat insulation box 12 so that the dehumidification duct 17 and the deodorizing duct 18 may be connected.

  A fin tube type cooler 13 constituting the refrigerant cycle of the cooling device 6 is housed and installed in the rear portion of the heat insulating box 12, that is, below the dehumidifying duct 17, and this is also cooled on the upper side. A fin tube type heater 14 constituting the refrigerant cycle of the apparatus 6 is housed and installed. A drain receiver 32 is provided below the cooler 13 at the lower back of the heat insulating box 12. The drain receiver 32 allows water received in the drain receiver 32 to be discharged to the outside. A drain hose 33 for discharging is connected.

  In the heat insulating box 12 on the upper side of the heater 14, the blower 7 for supplying the exhaust in the dehumidifying duct 17 into the deodorizing duct 18 is housed and installed. The blower 7 is connected to the control device 50. The deodorizer 9 is housed and installed in the front side of the heat insulating box 12, that is, in the deodorizing duct 18. The deodorizer 9 is composed of, for example, a plurality of honeycomb-shaped porous deodorizing filters 9A containing, for example, activated carbon, and each deodorizing filter 9A can be inserted and removed from the front. It is assumed that the deodorizing filter 9A can be replaced independently.

  In addition, a partition wall 22 is provided on the front surface of the heat insulating box 12 to seal the front opening in an openable and closable manner. An exhaust communication portion 28 is formed below the partition wall 22 so as to correspond to the lower side of the deodorizer 9 of the deodorizing duct 18 formed in the heat insulating box 12.

  Furthermore, a door 2 is provided in front of the partition wall 22 so as to open and close the front of the air treatment unit 1 located at the upper part of the exterior case 4. The door 2 is hollow inside, and an exhaust duct 25 is formed in the door 2. A plurality of exhaust ports 26 are formed in the upper front part of the door 2, and the exhaust in the heat insulating box 12 is exhausted through the exhaust communication part 28 of the partition wall 22 in the lower rear part of the door 2. A suction port 27 for inflow or suction into the duct 25 is formed. At this time, a packing 29 as a seal member is provided on the rear surface of the door 2 or the front surface of the partition wall 22 and the peripheral portion of the suction port 27 in a state where the door 2 is closed. And the packing 30 for sealing the peripheral part of the exhaust communication part 28 is provided.

  Thus, when replacing the deodorizing filter 9A in the deodorizing duct 18, the door 2 is opened and the partition wall 22 is opened, so that the deodorizing filter 9A can be easily replaced from the front of the heat insulating box 12. Can do. Therefore, the maintenance workability of the deodorizing filter 9A is improved and the convenience is improved.

  On the other hand, an intake port 19 is formed on the back side of the hood portion 4D (the upper back side of the fryer 5) located at the upper portion of the work area 4C and faces the work area 4C. A grease filter 20 is attached which is positioned from the front end to the rear end of the dehumidifying duct 17 and is inclined downward from the front to the rear. The grease filter 20 has a net shape for adhering and removing oil mist. It is assumed that an oil receiver 34 for receiving oil (oil content) attached to the grease filter 20 is provided at the lower end of the grease filter 20.

  A suction port 21 is formed in the lower part of the dehumidifying duct 17 at a position corresponding to the upper side of the intake port 19 and in front of the drain receiver 32.

  Note that a temperature sensor 53 for detecting the air temperature above the cooking device S is provided on the air downstream side of the suction port 21 of the dehumidifying duct 17. The temperature sensor 53 is provided in the control device 50. It shall be connected.

On the other hand, an illumination (fluorescent lamp) 38 is attached to the hood portion 4D of the work area 4C. It is assumed that a translucent illumination cover 39 covered with titanium oxide (TiO ₂ ) is provided below the illumination 38 so as to cover the lower surface of the illumination 38.

  As a result, when the illumination 38 is turned on, the titanium oxide of the illumination cover 39 can form a hydrophilic film by the UV emitted from the illumination 38, and oil and dust adhering to the surface of the illumination cover 39 can be formed. Etc. can be easily wiped away. Thereby, cleaning workability | operativity improves and the convenience improves.

  In FIG. 1 and FIG. 2, reference numeral 40 denotes a dehumidifying duct 17 and a deodorizing unit that sequentially reach the exhaust communication part 28 through the cooler 13, the heater 14, the blower 7, and the deodorizer 9 in the heat insulating box 12. This is a fan casing for constituting the duct 18. 2 is a shower nozzle constituting a hot water washing mechanism for washing the cooler 13 and the heater 14 disposed in the dehumidifying duct 17 with hot water. The shower nozzle 41 is an external hot water supply. It is connected to the device 42.

  Next, the cooling device 6 will be described with reference to the refrigerant circuit diagram of FIG. The cooling device 6 includes the compressor 10, the condenser 11, the dry core 43, the liquid receiver 44, the refrigerant recovery electromagnetic valve 45, the heater 14, the expansion valve 46, and the cooler 13. Then, the evaporating pressure adjusting valve 49, the check valve 47, and the accumulator 48 are sequentially connected in an annular manner to form a refrigerant pipe. The evaporating pressure adjusting valve 49 is a pressure adjusting valve for maintaining the evaporating temperature of the refrigerant in the cooler 13 at a predetermined value or higher, and in this embodiment at −5 ° C. or higher. The throttle adjustment is performed when the inlet pressure of the adjusting valve becomes equal to or higher than a certain pressure. Further, the check valve 47 is a valve device that prevents the refrigerant from flowing backward from the compressor 10 to the cooler 13, and 54, 55, 56, and 57 in FIG. 3 are service valves.

  Next, the control device 50 will be described with reference to FIG. The control device 50 is constituted by a general-purpose microcomputer incorporating a timer 51 as time limit means. Further, on the input side of the control device 50, a control panel 58 provided on the front surface of the cooking device S, the temperature sensor 53, a cooler temperature sensor 59 for detecting the temperature of the cooler 13, and an external fire An external input 60 from a sensor or the like is connected, and the compressor 10, the blower 7, the condenser blower 8, and the refrigerant recovery electromagnetic valve 45 are connected to the output side. .

  The control panel 58 includes a power switch 61, a break mode selection switch 62 for switching whether or not to shift to a break mode, which will be described later, and whether or not to shift from a break mode, which will be described later, to a dehumidifying operation mode. An automatic return switch 63 that switches between the two is provided. When a hot water washing mechanism is provided as in the present embodiment, a hot water washing electromagnetic valve 64 is connected to the output side of the control device 50 and a hot water washing switch 65 is provided on the control panel 58. It is assumed that

  Next, the operation of the cooling device 6 will be described. When the operation of the compressor 10 of the cooling device 6 is started by the control device 50, the high-temperature and high-pressure gas refrigerant discharged from the refrigerant pipe on the discharge side of the compressor 10 flows into the condenser 11 and is condensed and liquefied refrigerant. Or it becomes a liquid gas mixed refrigerant. The high pressure liquefied refrigerant or the liquid gas mixed refrigerant that has flowed out of the condenser 11 has the refrigerant recovery electromagnetic valve 45 opened by the control device 50, and therefore, the dry core 43, the liquid receiver 44, and the refrigerant recovery electromagnetic valve 45. And then flows into the heater 14. Then, the high-pressure liquefied refrigerant or the liquid-gas mixed refrigerant that has flowed into the heater 14 installed on the downstream side of the circulating air of the cooler 13 of the dehumidifying duct 17 releases heat to the surroundings and exerts a heating action. Thereafter, the high-pressure refrigerant flowing into the expansion valve 46 is depressurized and then flows into the cooler 13. The refrigerant that has flowed into the cooler 13 installed in the dehumidifying duct 17 evaporates and takes heat from the surroundings to exert a cooling action. Then, the refrigerant discharged from the cooler 13 returns to the compressor 10 via the evaporation pressure adjusting valve 49, the check valve 47, and the accumulator 48.

  At this time, as described above, the evaporating pressure adjusting valve 49 has an inlet pressure that is equal to or higher than a predetermined pressure so that the evaporating temperature of the refrigerant in the cooler 13 is maintained at a predetermined value or higher, in this embodiment, −5 ° C. or higher. Therefore, the refrigerant evaporating temperature in the cooler 13 can be adjusted regardless of the change in the heat load entering the dehumidifying duct 17 from the outside air temperature or the cooking means such as the fryer 5. It can be maintained at a predetermined value or higher, in this embodiment, at −5 ° C. or higher. Thereby, the cooler 13 is brought into a supercooled state due to a decrease in the heat load, and the inconvenience of causing frost blockage in the dehumidifying duct 17 can be avoided in advance.

  Further, the compressor 10 is subjected to ON-OFF control based on the output of the cooler temperature sensor 59 provided in the cooler 13 by the control device 50. Therefore, the compressor 10 can be ON-OFF controlled based on the temperature of the cooler 13 that is directly detected, and the frost blockage in the dehumidifying duct 17 due to the supercooled state of the cooler 13 is further suppressed. Can do.

  Next, the operation of the cooking apparatus S with the above configuration will be described. When the compressor 10 and the blower 7 of the cooling device 6 are operated by the control device 50, the heater 14 exerts a heating action as described above, the cooler 13 exerts a cooling action, and the work of the cooking apparatus S is performed. Exhaust gas generated in the space 4C is sucked into the dehumidifying duct 17 in the heat insulating box 12 from the suction port 21 through the grease filter 20, and deodorized in the cooler 13, the heater 14, the blower 7, and the deodorizing duct 18. The circulation of the air that passes through the vessel 9 and the exhaust duct 15 in the door 2 in order and is discharged from the cooking device S through the exhaust port 26 is formed.

  On the other hand, exhaust gas containing a large amount of moisture (steam), oil mist, and odor rises from the fryer 5 toward the hood portion 4D of the work area 4C and is sucked into the intake port 21 on the upper back side. The oil mist in the exhaust sucked into the intake port 21 is adhered and removed in the process of passing through the grease filter 20. The oil (oil component) adhering to the grease filter 20 is collected in an oil receiver 34 attached to the lower end of the grease filter 20 and discarded.

  The exhaust gas that has passed through the grease filter 20 as described above is sucked into the dehumidifying duct 17 of the heat insulating box 12 from the suction port 21 and eventually reaches the cooler 13. Since the exhaust gas that has reached the cooler 13 is cooled while passing through the cooler 13, moisture (water) contained in the exhaust gas becomes dew and adheres to the surface of the cooler 13. As a result, the exhaust is dehumidified. The exhaust gas adhering to the cooler 13 is received by the drain receiver 32 and discarded to the outside through the drain hose 33.

  Here, the cooler 13 is supercooled at a predetermined temperature based on the compressor 10 that is ON-OFF controlled based on the temperatures of the evaporation pressure adjusting valve 49 and the cooler 13 as described above, and in this embodiment, is −5 ° C. or lower. Since it is controlled so as not to be in a state, it is possible to avoid inconvenience that frost blockage occurs in the dehumidifying duct 17 due to moisture adhering to the surface of the cooler 13. As a result, cooking exhaust can be circulated stably in the dehumidifying duct 17 and a stable dehumidifying ability can be exhibited.

  The exhaust gas after being dehumidified by the cooler 13 reaches the heater 14 and is heated in the process of passing therethrough, so that the relative humidity of the exhaust gas decreases. Here, in this embodiment, since the high-pressure liquid refrigerant or the gas-liquid mixed refrigerant after radiating heat in the condenser 11 is caused to flow into the heater 14, the high-pressure liquid refrigerant or the gas-liquid mixed refrigerant is supplied to the cooler 13. By the exhaust gas cooled by the above, it becomes possible to cool and enter a supercooled state. Thereby, even if it is the capability of the limited compressor 10, the increase in the cooling capability of the cooler 13 can be aimed at now. Further, even when the condensation capacity of the condenser 11 is reduced due to the temperature rise in the kitchen, the heater 14 exhibits the same effect as the condenser 11, so that the discharge gas high-pressure abnormality from the compressor 10 or the temperature rises. It is possible to avoid oil deterioration and abnormal stoppage.

  Then, the exhaust gas whose relative humidity has been lowered by the heater 14 passes through the blower 7 and reaches the deodorizer 9 in the deodorizing duct 18, and the odor component contained in the exhaust gas is adsorbed in the process of passing through the deodorizing filter 9 </ b> A. The exhaust gas that has passed through the deodorizer 9 is smoothly fed into the exhaust duct 25 by the exhaust communication portion 28 with the door 2 closed. The exhaust gas flowing into the exhaust duct 25 rises in the exhaust duct 25 and is finally blown out from the exhaust port 26 to the outside of the device S (inside the kitchen).

  In this way, in the cooking apparatus S of the present embodiment, individual circulation ventilation is performed in which the exhaust from the fryer 5 is sucked, dehumidified by the cooler 13 and discharged into the kitchen. Even in an installation situation where exhaust cannot be discharged outside the kitchen, the kitchen will not be filled with moisture. Moreover, since the odor component contained in the steam rising from the fryer 5 is also removed at this time, it is also deodorized at this stage.

  And since exhaust_gas | exhaustion is sent to the duct 18 for deodorization provided with the deodorizer 9, the odor produced when cooking with a fryer 5 or a griddle like an Example can be removed with this deodorizer 9. FIG. The work environment in the kitchen can be further improved.

  Further, a heater 14 is arranged between the deodorizer 9 on the downstream side of the air of the cooler 13, and the low-temperature exhaust gas after moisture is condensed and adhered to the surface of the cooler 13 is heated by the heater 14. Therefore, the exhaust gas having a lower relative humidity is supplied to the deodorizer 9. As a result, it is possible to avoid the inconvenience that moisture enters the deodorizer 9 made of porous activated carbon and the deodorizing action is lowered due to moisture.

  In the cooking apparatus S in the present embodiment, the dehumidifying operation mode and the break mode are executed by the control device 50. That is, the dehumidifying operation mode is a mode in which the exhaust from the fryer 5 is dehumidified by operating the blower 7 and the compressor 10 of the cooling device 6 as described above, and the break mode is only the blower 7. In this mode, the operation of the compressor 10 of the cooling device 6 is stopped.

  Normally, when the power switch 61 of the control panel 58 is turned on, the control device 50 executes a dehumidifying operation mode in which the blower 7 and the compressor 10 are operated. However, when the cooking load in the fryer 5 is reduced and the thermal load entering the dehumidifying duct 17 is reduced, no further cooling action in the cooler 6 is required, and therefore the cooling device without any thermal load. Driving 6 will cause an unnecessary increase in running cost.

  Therefore, the control device 50 performs cooking in the fryer 5 when the number of ON-OFF control of the compressor 10 based on the cooler temperature sensor 59 during the dehumidifying operation mode, that is, the ON-OFF cycle reaches a predetermined number. It judges that it is not, and stops the driving | operation of the compressor 10, It transfers to the break mode which drives only the air blower 7. FIG. Thereby, the energy saving operation which can restrict | limit the operation | movement of the compressor 10 more than necessary can be performed now.

  In this embodiment, the transition from the dehumidifying operation mode to the rest mode by the control device 50 can be arbitrarily selected by a rest mode selection switch 62 provided on the control panel 58. Thereby, it becomes possible to select the presence or absence of the break mode according to the use situation of the user, and the convenience is improved.

  Further, when the temperature of the cooler 13 is increased during the break mode, the control device 50 determines that cooking in the fryer 5 has been resumed, and the compressor 10 is based on the output of the cooler temperature sensor 59. Return to the dehumidifying operation mode that turns the operation on and off. Thereby, when the heat load increases due to the start of cooking by the fryer 5 during the break mode, dehumidification by the cooler 13 can be performed without performing an operation for instructing the operation of the compressor 10 by the user. Become. Therefore, complicated device operation can be avoided, and usability can be improved and smooth dehumidification operation can be realized.

  In this embodiment, the return from the break mode to the dehumidifying operation mode can be arbitrarily selected by an automatic return switch 63 provided on the control panel 58. Thereby, it becomes possible to select the return from the break mode to the dehumidifying operation mode according to the use situation of the user, and the convenience is improved.

  Next, an abnormal temperature rise of the air treatment unit 1 or a pump down operation when a fire occurs will be described. When the temperature sensor 53 disposed above the fryer 5 detects a predetermined high temperature condition or when there is a predetermined input signal for notifying the occurrence of a fire by the external input 60, the control device 50 is described above. As described above, the refrigerant recovery electromagnetic valve 45 provided between the refrigerant outlet of the condenser 11 and the refrigerant inlet of the heater 14 is closed, and in this state, the pump-down operation for forcibly operating the compressor 10 is executed. This pump-down operation makes it possible to recover the refrigerant from the refrigerant recovery electromagnetic valve 45 downstream to the refrigerant pipe, the heater 14 and the check valve 47 into the condenser 11 and the liquid receiver 44.

  As a result, there is usually a predetermined input signal for notifying the occurrence of a fire or when the upper part of the fryer 5 that does not reach a certain high temperature due to the inflow of outside air falls into an abnormal situation that satisfies a predetermined high temperature condition. In this case, by performing a pump-down operation, the condenser 11 and the liquid receiver that are not disposed in the circulation path of the exhaust gas from the fryer 5, that is, the dehumidifying duct 17 and the deodorizing duct 18 44 can be collected. As a result, it is possible to prevent the piping and the like from being ruptured by the high-pressure refrigerant gas, and to improve the safety of the apparatus.

  The pump-down operation is continuously performed for a certain period of time by the control device 50, so that after the refrigerant is recovered, the power switch 61 is shut off and the refrigerant pump is turned on until the power switch 61 is turned on again by the user. It is assumed that the refrigerant recovery electromagnetic valve 45 that maintains the down state is maintained in a closed state.

  Thus, even when the cause of the high temperature state above the fryer 5 is a fire, the refrigerant is disposed in the circulation path of the exhaust from the fryer 5, that is, in the dehumidification duct 17 after the pump down operation is completed. The inconvenience flowing into the heater 14 and the cooler 13 can be avoided.

  In addition, when the hot water washing mechanism which wash | cleans the heater 14 and the cooler 13 with hot water like this Example is provided, when the washing | cleaning switch 65 of the control panel 58 is operated, the control apparatus 50 is operated. It is assumed that the pump down operation as described above is performed before opening the hot water solenoid valve 64 for cleaning. Thereby, the temperature rise of the refrigerant | coolant in the heater 14 and the cooler 13 accompanying washing | cleaning of hot water can be avoided, and the danger that piping etc. burst by the pressure rise accompanying the said temperature rise can be avoided. Become.

  In the present embodiment, the cooking apparatus S in which the fryer 5 as the cooking means and the air treatment unit 1 are integrally formed has been described as an example. However, the air treatment unit 1 is provided separately from the cooking means. Even when configured as an air treatment device, the same effect is obtained.

  In the present embodiment, the cooking device S is configured such that the upper part of the outer case 4 constituting the air treatment unit 1 and the lower part of the outer case 4 constituting the cooking means (flyer 5) are integrally formed. In addition to this, in order to facilitate conveyance at the time of carry-in, it may be configured to be vertically separable.

  In the above embodiment, the fryer 5 has been described as an example of cooking means. However, the present invention is not limited to this, and the present invention can be applied to various cookers used in restaurants and fast food restaurants.

It is a vertical side view of the cooking device to which the present invention is applied. It is a vertical side view of the cooking apparatus provided with the hot water washing mechanism. It is a refrigerant circuit figure of a cooling device. It is a control block diagram of a control apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS S Cooking apparatus 1 Air processing part 4 Exterior frame 4C Work area 5 Flyer 6 Cooling device 7 Blower 10 Compressor 11 Condenser 13 Cooler 14 Heater 17 Dehumidification duct 21 Inlet 41 Shower nozzle (hot water washing mechanism)
42 Hot water supply system (hot water washing mechanism)
44 Liquid receiver 45 Solenoid recovery solenoid valve 46 Expansion valve 47 Check valve 49 Evaporation pressure adjustment valve 50 Control device 53 Temperature sensor 58 Control panel 59 Cooler temperature sensor 60 External input 61 Power switch 62 Rest mode selection switch 63 Automatic recovery switch

Claims (6)

A kitchen air treatment device for treating exhaust generated from cooking means for cooking food in a kitchen,
A cooling device in which a compressor circuit, a condenser, a heater, a decompression device, and a cooler are sequentially connected in a pipe to form a refrigerant circuit;
An air treatment duct configured above the cooking means and into which exhaust from the cooking means flows;
The cooler and the heater are disposed in the air treatment duct, and exhaust air from the cooking means is caused to flow to the air treatment duct by a blowing means, and the evaporation temperature of the refrigerant in the cooler is set to a predetermined value or more. An air treatment apparatus for a kitchen, wherein an evaporating pressure adjusting valve for maintaining is provided in the refrigerant circuit.   2. The kitchen air treatment apparatus according to claim 1, further comprising a control unit that performs on-off control of the operation of the compressor based on the temperature of the cooler.   3. The kitchen according to claim 2, wherein when the ON-OFF cycle of the compressor reaches a predetermined number of times, the control unit stops the compressor and shifts to a rest mode in which only the blowing unit is operated. Air treatment equipment.   4. The kitchen air treatment device according to claim 3, wherein the control means includes means for switching whether to shift to the rest mode.   The said control means returns to the dehumidification operation mode which turns on and off the operation | movement of the said compressor from the said rest mode based on the rise in the temperature of the said cooler, The kitchen use of Claim 3 or Claim 4 characterized by the above-mentioned Air treatment device.   6. The kitchen air treatment apparatus according to claim 5, wherein the control means includes means for switching whether or not to shift to the dehumidifying operation mode.

Images