JP2016202002A - Apparatus for producing food and drink - Google Patents

Abstract

PROBLEM TO BE SOLVED: To detect leakage from a heat exchanger in an apparatus for producing food and drink.SOLUTION: A production apparatus, in which food and drink having flowability are subjected to heat treatment and then subjected to cooling treatment, includes a heat exchanger for cooling 14 provided with a cooling element 34 cooling the heated food and drink by a cooling medium. A conductivity detector C2 for a cooling medium which detects the electric conductivity of the cooling medium flowing through a cooling element 34 detects the electric conductivity of the cooling medium in a state where a liquid having an electric conductivity than that of the cooling medium flows through the heat exchanger for cooling 14. Leakage of the cooling element is detected based on a detection signal of the electric conductivity.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a food and drink manufacturing apparatus that detects leakage of a heat exchange element of a heat exchanger that constitutes a fluid food and drink manufacturing apparatus.

  The process for producing fluid food and drink such as fruit juice, soup, and miso has a heating process for heat sterilizing food and drink and a cooling process for cooling the heat sterilized food to room temperature or refrigerated temperature. doing. Patent document 1 is disclosing the manufacturing apparatus of a cooking sauce. This manufacturing apparatus has a sterilizer for heating and sterilizing a cooking sauce prepared by mixing ingredients of cooking sauce, and a cooler for cooling the heated cooking sauce, and the cooking sauce is continuously sterilized by piping. It is conveyed to the machine and the cooler. A back pressure tank is connected to the piping to increase the pressure of the cooking sauce in the piping. As the sterilizer and the cooler in this manufacturing apparatus, a plate-type or tube-type heat exchanger is used. Patent Document 2 discloses a continuous heat sterilization apparatus for fluid food containing solid matter. This thermal sterilizer has a positive displacement rotary pump and a hydraulic pump driven by the rotary pump in order to supply fluid food sterilized and heated by the sterilizer to the filling device. The hydraulic oil discharged from the hydraulic pump is throttled by a throttle valve to increase the pressure of the fluid food.

Patent Literature 3 discloses a heating device that energizes fluid food and drink and heats the food and drink by Joule heat, and the heat-treated food and drink is cooled by a cooling device having a cooling pipe. The food and drink supplied to the heating device is preheated by a heat exchange type preheating device, and in order to keep the food and food heated by the heating device at a heating temperature, a heating temperature retainer as a heat insulator is a heating device and cooling device It is provided between.
Japanese Patent Laid-Open No. 11-155535 JP-A-5-308937 JP 2006-320402 A

  In this way, in a food and beverage manufacturing apparatus that is sterilized, that is, heat-treated by a heater while transporting food and drink, the back pressure is applied to the pipe that transports the food and drink to increase the pressure of the food and drink. ing. A heat exchanger as a heater has a heat transfer member having a product flow path for guiding food and drink and a medium flow path for guiding hot water as a heating medium for heating the product, that is, a heating element. . Therefore, in order to increase the pressure of food and drink, if the pressure of the product flow path is made higher than the pressure of the medium flow path, even if damage such as pin holes occurs in the heating element, The heating medium is not mixed. For this reason, if the heat exchanger is regularly inspected, the manufacturing apparatus can be operated.

  On the other hand, depending on the fluid food and drink, if a throttle valve or an orifice is provided as a pressure loss element in the pipe in order to increase the pressure of the food or drink, the quality may deteriorate. For example, when heat-treating with a heater while transporting fluid food or drink containing solid components, such as fruit preparations, that is, processed fruit foods containing fruit pulp, Solid component cannot pass. In addition, when heat-treating the whole liquid egg, it has been found that when the whole liquid egg passes through a throttle valve or an orifice, the egg white is destroyed and the viscosity of the whole liquid egg is lowered to deteriorate the quality.

  For this reason, when food and drink are heat-treated with a heat exchanger without increasing the pressure of the food and drink, the product flow path and the medium flow path are communicated with the heating element that partitions the product flow path and the medium flow path. If damage such as pinholes occurs, it is assumed that the heating medium leaks and enters the product flow path. On the other hand, in the food and beverage manufacturing apparatus provided with a heat exchange type cooler to cool the heated food and drink, a product flow path for guiding the food and drink and cooling as a cooling medium for cooling the product flow path. It has a heat transfer member having a medium flow path for guiding water, that is, a cooling element. For this reason, if a damage such as a pinhole that causes the product flow path and the medium flow path to communicate with the cooling element that partitions the product flow path and the medium flow path occurs, the cooling medium leaks and enters the food and drink. It is assumed that

  Therefore, in a food and beverage production apparatus having at least one of a cooler having a cooling element and a heater having a heating element, it is necessary to reliably detect damage to the heat exchange element including the cooling element and the heating element.

  The objective of this invention is detecting the leak of the heat exchanger in the manufacturing apparatus of food and drink.

  The food / beverage production apparatus of the present invention is a food / beverage production apparatus that heat-treats a food / beverage having fluidity and then cools the heated food / beverage. A heat exchanger for cooling provided with a cooling element for cooling by the medium, a conductivity detector for the cooling medium for detecting the electric conductivity of the cooling medium flowing through the cooling element, and an electric conductivity higher than that of the cooling medium A cooling medium leakage detector for detecting leakage of the cooling element based on a detection signal of electrical conductivity from the conductivity detector under a state in which a liquid flows through the cooling heat exchanger; Have.

  The food / beverage production apparatus of the present invention is a food / beverage production apparatus for heat-treating a food / beverage having fluidity, and a product channel for guiding the food / beverage to be heated, and a food / drink flowing through the product channel Heat exchanger having a heating element provided with a heating medium flow path for guiding a heating medium for heating the heating medium, and conductivity detection for the heating medium for detecting the electric conductivity of the heating medium flowing through the heating element And a liquid having a higher electrical conductivity than the heating medium in a state of flowing through the heating heat exchanger, based on a detection signal of the electrical conductivity from the conductivity detector, A heating medium leakage detection unit for detecting leakage.

  According to the present invention, in a food and beverage production apparatus including at least one of a heating heat exchanger and a cooling heat exchanger, based on a detection signal from a conductivity detector, a cooling element or a heating element Leakage can be detected. Therefore, even if it is a case where it heats, conveying food and drink with the pressure lower than the pressure of a cooling medium or a heating medium, damage to the heat exchange element which consists of a cooling element or a heating element can be detected reliably. If the cleaning liquid is allowed to flow when detecting the leakage, the leakage can be detected while cleaning the manufacturing apparatus. Moreover, when manufacturing food and drink having high electrical conductivity, leakage can be detected while manufacturing food and drink.

It is a system configuration figure showing the food and drink manufacturing device which is one embodiment. It is a block diagram which shows the control circuit of the manufacturing apparatus of the food and drink shown in FIG. It is a system block diagram which shows the food-and-beverage manufacturing apparatus which is other embodiment.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. As shown in FIG. 1, the food and drink manufacturing apparatus is used for manufacturing food and drink by cooling the food and drink having fluidity such as fruit juice, soup and miso, followed by cooling treatment. These preparations can be performed using preparations, liquid whole eggs and the like as food and drink.

  This manufacturing apparatus has a tank 10 into which food and drink are put, and the food and drink are put into the tank 10 through a supply pipe 11. The food and drink in the tank 10 is sterilized and heated by a heating heat exchanger 12 as a heater, and the heated food and drink is held at a heating temperature by a heating temperature holder 13 for a predetermined time. The food and drink held at the heating temperature is cooled by the cooling heat exchanger 14. The tank 10 is connected to a heating heat exchanger 12 by a pipe 15, the heating heat exchanger 12 is connected to a heating temperature holder 13 by a pipe 16, and the heating temperature holder 13 is cooled by a pipe 17. Connected to. The food and drink cooled by the cooling heat exchanger 14 is conveyed to the next process such as a filling process through the pipe 18. A pump 19 is provided in the pipe 15 in order to transport food and drink in the tank 10 to a filling process or the like.

  The heating heat exchanger 12 is formed by a double-pipe heat exchanger, a plate-type heat exchanger, a multi-tube heat exchanger, or the like, and heats food and drinks through product flow paths for guiding food and drinks. A heating medium flow path for guiding the heating medium for heating is provided with a heat transfer member, that is, a heating element 21 provided via a wall member. In FIG. 1, a heating element 21 having a product flow path and a heating medium flow path is schematically shown. The product inlet 22 a of the product flow path of the heating element 21 is connected to the pipe 15, and the product outlet 22 b of the product flow path is connected to the pipe 16.

  A circulation pipe 24 is connected between the medium inlet 23 a of the heating medium flow path of the heating element 21 and the medium outlet 23 b, and a pump 25 is provided in the circulation pipe 24. The pump 25 circulates and supplies hot water as a heating medium to the heating medium flow path of the heating element 21 via a circulation pipe 24. The circulation pipe 24 is provided with a hot water generator 26 composed of a heat exchanger. The hot water generator 26 has a hot water flow path through which hot water flows and steam as a heating medium for heating the hot water. A steam flow path has a heat transfer member provided with a wall member, that is, a hot water generating element 27. Similar to the heat exchanger 12 for heating, the hot water generator 26 is formed by a double pipe heat exchanger or the like. A steam supply pipe 29 is connected to the steam inlet 28a of the steam flow path, and a steam discharge pipe 32 is connected to the steam outlet 28b of the steam flow path. Therefore, the hot water flowing through the hot water generating element 27 by the steam supplied from the steam supply source 31 is heated to a predetermined temperature and supplied to the heating element 21 of the heating heat exchanger 12. The steam that has heated the hot water is returned from the steam discharge pipe 32 to the steam supply source 31. Thus, the heating heat exchanger 12 is an indirect heating type heat exchanger that heats food and drink with hot water heated by steam.

  The heating temperature holder 13 has a hold pipe 33 provided between the pipe 16 and the pipe 17, and a heat insulating member is provided around the hold pipe 33. The food and drink heated by the heating heat exchanger 12 is held at the heating temperature, that is, the sterilization temperature for the time flowing through the hold pipe 33. However, in order to immediately cool the heated food and drink, a manufacturing apparatus not provided with the heating temperature holder 13 is used.

  The cooling heat exchanger 14 includes a heat transfer member provided with a product flow path for guiding heated food and drink and a cooling medium flow path for guiding a cooling medium for cooling the food and drink flowing through the product flow path. That is, it has a cooling element 34. In FIG. 1, a cooling element 34 having a product flow path and a cooling medium flow path is schematically shown. The product inlet 35 a of the product flow path of the cooling element 34 is connected to the pipe 17, and the product outlet 35 b of the product flow path is connected to the pipe 18.

  A cooling medium supply pipe 37 is connected to the medium inlet 36a of the cooling medium flow path, and cooling water as a cooling medium from the cooling water supply source 38 is supplied to the cooling medium flow path. A cooling medium outlet pipe 39 is connected to the medium outlet 36 b, and the cooling water that has passed through the cooling medium flow path is returned to the cooling water supply source 38. The cooling water supply source 38 includes a tank that stores the cooling water, a pump that discharges the cooling water, and the like. When the food and drink are manufactured by sterilizing and heating the food and drink, the cooling water supplied from the cooling water supply source 38 is directly supplied to the cooling medium flow path of the cooling element 34.

  Between the cooling medium supply pipe 37 and the cooling medium outlet pipe 39, a circulation pipe 41 for returning the cooling medium flowing out from the medium outlet 36b to the medium inlet 36a is connected. The circulation pipe 41 is provided with a pump 42, and the pump 42 circulates and supplies the cooling medium to the cooling medium flow path of the cooling element 34 through the circulation pipe 41. The cooling medium supply pipe 37 is provided with an opening / closing valve 43 positioned upstream of the circulation pipe 41, and the cooling medium outflow pipe 39 is provided with an opening / closing valve 44 positioned downstream of the circulation pipe 41. Yes. The circulation pipe 41 is provided with an opening / closing valve 45 located downstream of the pump 42. Therefore, when manufacturing food and drink, the on-off valves 43 and 44 are opened, and the on-off valve 45 is closed. Thereby, the cooling water supplied from the cooling water supply source 38 is directly supplied to the cooling medium flow path of the cooling element 34. Thus, the cooling heat exchanger 14 is a direct cooling heat exchanger that cools food and drink with cooling water. On the other hand, when detecting leakage of the cooling element 34, the on-off valve 45 is opened and the on-off valves 43, 44 are closed. By driving the pump 42 in this state, the cooling medium is circulated and supplied to the cooling medium flow path of the cooling element 34 via the circulation pipe 41.

  Has leakage occurred in the heating element 21 of the heating heat exchanger 12 and the cooling element 34 of the cooling heat exchanger 14 before the production of food or drink or after the production of a predetermined amount of food or drink? Check for leaks. When performing this inspection, the test liquid L, which is a liquid, is supplied into the tank 10. As the test liquid L, a liquid having higher electrical conductivity than hot water that is a heating medium and cooling water that is a cooling medium is used. Before or after the production of food and drink, the inside of the flow path through which the food and drink from the tank 10 to the pipe 18 in the production apparatus flows is washed. In FIG. 1, the path | route through which food and drink flows is shown by the thick line.

  A sodium hydroxide solution is used as the cleaning liquid L for cleaning in the flow path. Since the sodium hydroxide solution has higher electrical conductivity than clean water used as hot water or cooling water, by using the cleaning liquid as the test liquid L, the heating element 21 of the heating heat exchanger 12 and the cooling water are used. It is inspected whether or not the cooling element 34 of the heat exchanger 14 has leaked.

  In this way, leakage of the heating element 21 and the cooling element 34 can be inspected by using the cleaning liquid as the test liquid L while flowing the cleaning liquid into the flow path to clean the manufacturing apparatus. FIG. 1 shows a state in which a test liquid L as a cleaning liquid is supplied into the tank 10. The test liquid L in the tank 10 is supplied by a pump 19 to the heating heat exchanger 12, the heating temperature holder 13, and the cooling heat exchanger 14. In order to return the test liquid L that has flowed out to the pipe 18 to the tank 10, a return pipe 51 is provided between the pipe 18 and the tank 10.

  The pipe 18 is provided with an on-off valve 52 positioned downstream of the return pipe 51, and an on-off valve 53 is provided on the upstream side of the return pipe 51. When manufacturing food and drink, the on-off valve 53 is closed and the on-off valve 52 is opened. On the other hand, when the leakage of the heating element 21 and the cooling element 34 is inspected while cleaning the flow path of the manufacturing apparatus, the on-off valve 52 is closed and the on-off valve 53 is opened. Under this state, the cleaning liquid in the tank 10, that is, the test liquid L is circulated in the flow path of food and drink in the manufacturing apparatus by the pump 19. The opening when the on-off valve 53 is fully opened is set smaller than the opening when the on-off valve 52 is fully opened. Thereby, at the time of inspection of leakage, the pressure of the test liquid L flowing in the flow path between the pump 19 and the pipe 18 is higher than the pressures of the heating medium and the cooling medium, compared to when manufacturing food and drink.

  On the outflow side of the circulation pipe 24 provided in the heat exchanger 12 for heating, there is provided a conductivity detector C1 for the heating medium that detects the electrical conductivity of the heating medium flowing through the heating element 21, that is, the conductivity. . When the electrical conductivity of the heating medium flowing through the heating element 21 and flowing into the circulation pipe 24 is detected by the conductivity detector C1, before the test liquid L is flowed to the manufacturing apparatus and after the test liquid L is flowed for a predetermined time, It is possible to detect whether or not damage such as pinholes has occurred in the heating element 21 due to the change in the electrical conductivity of the heating medium. That is, when the test liquid L leaks from the product flow path of the heating element 21 to the heating medium flow path due to damage to the heating element 21, the electrical conductivity of the heating medium flowing through the heating medium flow path is increased. Damage to the heating element 21 can be detected by a change in conductivity.

  On the outflow side of the circulation pipe 41 provided in the cooling heat exchanger 14, a cooling medium conductivity detector C <b> 2 for detecting the electrical conductivity of the cooling medium flowing through the cooling element 34, that is, the conductivity, is provided. . When the electrical conductivity of the cooling medium flowing through the cooling element 34 and flowing into the circulation pipe 41 is detected by the conductivity detector C2, before the test liquid L is flowed to the manufacturing apparatus and after the test liquid L is flown for a predetermined time, It is possible to detect whether or not damage such as pinholes has occurred in the cooling element 34 due to the change in the electrical conductivity of the cooling medium. That is, if the test liquid L leaks from the product flow path of the cooling element 34 to the cooling medium flow path due to damage to the cooling element 34, the electrical conductivity of the cooling medium flowing through the cooling medium flow path increases, Damage to the cooling element 34 can be detected by a change in conductivity.

  Thereby, even when manufacturing food and drink in which the flow path in which food and drink flow cannot be squeezed, such as fruit preparation containing solids and liquid whole eggs, the heat exchanger 12 for heating and the heat exchanger 14 for cooling Can be detected.

  Furthermore, when food and drink having higher electrical conductivity than the heating medium and the cooling medium are sterilized by heating, leakage of the heating element 21 and the cooling element 34 can be detected while sterilizing the food and drink. Thus, when leak detection is performed while producing food and drink, the return pipe is closed.

  In the manufacturing apparatus shown in FIG. 1, food and drink are cooled by a cooling medium supplied from a cooling water supply source 38 having a cooling water tank or the like at the time of product manufacture, and a cooling heat exchanger is provided by a circulation pipe 41 when leakage is detected. A circulating flow of the cooling medium is passed through 14.

  FIG. 2 is a block diagram showing a control circuit of the food and drink manufacturing apparatus shown in FIG. 1, and the controller 60 includes a food and drink manufacturing process by operating the operation panel 61, a heat exchanger, that is, a heating heat exchanger. 12 and the cooling heat exchanger 14 leakage detection processing switching signal are input. The controller 60 receives electrical conductivity detection signals from the conductivity detectors C1 and C2. The controller 60 sends drive signals to the respective pumps 19, 25, 45 shown in FIG. 1 and sends drive signals to the respective on-off valves 43, 44, 45, 52, 53. Further, a signal is sent from the controller 60 to the display unit 62. The display unit 62 displays whether the manufacturing apparatus manufactures food or drinks, detects whether the heat exchanger has leaked, or the like.

  The controller has a microprocessor that outputs a drive signal based on the detection signal, and a memory that stores arithmetic expressions and data, and leakage of the heating element 21 based on the detection signals from the conductivity detectors C1 and C2. It functions as a heating medium leakage detection unit for detecting the leakage and a cooling medium leakage detection unit for detecting leakage of the cooling element 34.

  The display unit 62 displays the detection data from the respective conductivity detectors C1 and C2, and performs leakage detection processing so that when the electrical conductivity of the heating medium becomes high, the heating unit 12 of the heating heat exchanger 12 is displayed. In order to notify the abnormality, an alarm lamp is operated. Similarly, when the electrical conductivity of the cooling medium becomes high, the alarm lamp is operated to notify the abnormality of the cooling heat exchanger 14.

  FIG. 3 is a system configuration diagram showing a food and drink manufacturing apparatus according to another embodiment. 3, members that are the same as those shown in FIG. 1 are given the same reference numerals.

  As shown in FIG. 3, a secondary-side circulation pipe 41a is provided between the medium inlet 36a and the medium outlet 36b of the cooling medium flow path of the cooling heat exchanger 14, and the secondary-side circulation pipe is provided. A pump 42 is provided at 41a. By this pump 42, the secondary side cooling medium circulates between the secondary side circulation pipe 41 a and the cooling medium flow path of the cooling element 34.

  A medium-cooling heat exchanger 54 is provided in the secondary circulation pipe 41a. The medium cooling heat exchanger 54 cools the secondary side medium flow path for guiding the secondary side cooling medium flowing in the secondary side circulation pipe 41a and the secondary side cooling medium flowing in the secondary side medium flow path. A heat transfer member, that is, a primary side cooling element 55 provided with a primary side cooling medium flow path for guiding the primary side cooling medium for the purpose. FIG. 3 schematically shows a primary cooling element 55 having a secondary medium flow path and a primary medium flow path. The medium inlet 56a of the primary side medium flow path is connected to the primary cooling water supply source 38a by a cooling medium supply pipe 57, and the cooling medium outlet pipe 58 is connected to the medium outlet 56b.

  Therefore, the secondary side cooling medium supplied to the cooling heat exchanger 14 is cooled by the medium cooling heat exchanger 54 by the primary side cooling medium supplied from the primary cooling water supply source 38a. As described above, the cooling heat exchanger of the manufacturing apparatus shown in FIG. 3 has a secondary side that circulates between the secondary side circulation pipe 41a and the cooling element 34, both during product manufacture and when leakage is detected. Cool food and drink with a cooling medium. Thus, the cooling heat exchanger 14 is an indirect cooling type heat exchanger that cools food and drink with secondary cooling water that is cooled with primary cooling water.

  As described above, a cleaning liquid can be used as the test liquid L. However, as the test liquid, if the liquid has a higher electrical conductivity than the cooling medium or the heating medium, another liquid can be used instead of the cleaning liquid. Can be used.

  A leak test was simulated using the manufacturing apparatus shown in FIG. The amount of hot water as a heating medium circulating through the circulation pipe 24 was 55 L, and the amount of cooling water as a cooling medium circulating through the circulation pipe 41 was 106 L. Clean water is used as the heating medium and the cooling medium, and the initial electrical conductivity of clean water at that time is 20 mS / m. A 2% sodium hydroxide solution that is a cleaning liquid is used as the test liquid L, and the test liquid L is circulated in the product flow path of the manufacturing apparatus through the return pipe 51.

  Assuming that 0.55 mL (1 / 100,000) of the test liquid L leaks into the circulation pipe 24 through which hot water circulates, the electrical conductivity of the hot water in the circulation pipe 24 increases from 20 mS / m to 20.1 mS / m. . This increased value can be sufficiently detected by a normal electric conductivity meter. Assuming that a pinhole having a shallow diameter of 10 μm exists in the heating element 21, the pressure of the product flow path is set to 100 kPa higher than the pressure of the heating medium flow path, and the cleaning liquid as the test liquid L is supplied to the product flow path. When it was circulated, the amount of the test liquid L leaking into the heating medium flow path was 0.04 mL / min, and it was found that leakage of the test liquid could be detected with a 13-minute cleaning operation.

  Similarly, if 1.06 mL (1 / 100,000) of the test liquid L leaks into the circulation pipe 41 through which the cooling water circulates, the electrical conductivity of the cooling water in the circulation pipe 41 is 20 mS / m to 20.1 mS / m. If this rise value, it can be sufficiently detected by a normal electric conductivity meter. Assuming that a shallow pinhole having a diameter of 10 μm exists in the cooling element 34, the pressure of the product flow path is made 100 kPa higher than the pressure of the cooling medium flow path, and the cleaning liquid as the test liquid L is supplied to the product flow path. When it was circulated, the amount of the test liquid L leaking into the cooling medium flow path was 0.04 mL / min, and it was found that the test liquid leak could be detected in a 25-minute washing operation.

  The present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the scope of the invention. For example, although the manufacturing apparatus of the food and drink shown in FIGS. 1 to 3 has a heater formed by the heat exchanger 12 for heating, it is described in Patent Document 3 instead of the heat exchanger. It is good also as a Joule heating device. In that case, the leakage of the cooling heat exchanger 14 is detected. The present invention can also be applied to a manufacturing apparatus having two sets of heating heat exchangers for preheating and main heating. In that case, the leakage of each heating heat exchanger can be detected.

DESCRIPTION OF SYMBOLS 10 Tank 12 Heating exchanger 13 Heating temperature holder 14 Cooling heat exchanger 19 Pump 21 Heating element 24 Circulating pipe 25 Pump 26 Hot water generator 27 Hot water generating element 29 Steam supply pipe 31 Steam supply source 33 Hold pipe 34 Cooling element 37 Cooling medium supply pipe 38 Cooling water supply source 38a Primary cooling water supply source 41 Circulating pipe 41a Secondary side circulating pipe 42 Pump 51 Return pipe 54 Medium cooling heat exchanger 55 Primary cooling element 57 Cooling medium supply Plumbing

Claims (7)

It is a food and drink manufacturing apparatus that performs cooling treatment after heat-treating food and drink having fluidity,
A heater for heat-treating food and drink;
A heat exchanger for cooling provided with a cooling element for cooling the heated food and drink with a cooling medium;
A conductivity detector for the cooling medium that detects the electrical conductivity of the cooling medium flowing through the cooling element;
Leakage of the cooling element is detected based on an electrical conductivity detection signal from the conductivity detector in a state in which a liquid having a higher electrical conductivity than the cooling medium flows through the cooling heat exchanger. A cooling medium leakage detector
A device for producing food and drink. In the food and drink manufacturing apparatus according to claim 1,
The cooling heat exchanger is
A cooling element provided with a product flow path for guiding heated food and drink, and a cooling medium flow path for guiding a cooling medium for cooling the food and drink flowing through the product flow path;
A cooling medium supply pipe for supplying a cooling medium to the medium inlet of the cooling medium flow path;
A cooling medium outflow pipe for flowing out the cooling medium flowing out from the medium outlet of the cooling medium flow path;
A circulation pipe for returning the cooling medium flowing out from the medium outlet to the medium inlet,
Based on the electrical conductivity of the cooling medium that circulates through the cooling heat exchanger through the circulation pipe under the state in which the cooling medium is circulated through the circulation pipe through the cooling pipe, A food and drink manufacturing apparatus for detecting leakage of the cooling element. In the food and drink manufacturing apparatus according to claim 1,
The cooling heat exchanger is provided with a product flow path for guiding heated food and drink, and a cooling medium flow path for guiding a secondary cooling medium for cooling the food and drink flowing through the product flow path. A cooling element,
A secondary circulation pipe is provided between the medium inlet of the cooling medium flow path and the medium outlet of the cooling medium flow path,
A secondary side medium flow path for guiding the secondary side cooling medium flowing through the secondary side circulation pipe and a primary side medium flow path for guiding the primary side cooling medium for cooling the secondary side cooling medium are provided. A medium cooling heat exchanger having a primary side cooling element is connected to the cooling heat exchanger;
A food and drink manufacturing apparatus that detects leakage of the cooling element based on the electrical conductivity of a cooling medium circulating through the cooling heat exchanger via the secondary circulation pipe. In the manufacturing apparatus of the food and drink according to any one of claims 1 to 3,
The heater has a heating element provided with a product flow path for guiding food and drink to be heated, and a heating medium flow path for guiding a heating medium for heating food and drink flowing through the product flow path. A heat exchanger,
A conductivity detector for the heating medium that detects the electrical conductivity of the heating medium flowing through the heating element;
A heating medium leakage detector for detecting leakage of the heating element based on a detection signal of electrical conductivity from the conductivity detector for the heating medium;
A device for producing food and drink. In a food and drink manufacturing apparatus for heat-treating fluid food and drink,
A heat exchanger having a heating element provided with a product flow path for guiding a heated food and drink, and a heating medium flow path for guiding a heating medium for heating the food and drink flowing through the product flow path;
A conductivity detector for the heating medium that detects the electrical conductivity of the heating medium flowing through the heating element;
Leakage of the heating element is detected based on an electrical conductivity detection signal from the conductivity detector in a state where a liquid having a higher electrical conductivity than the heating medium is passed through the heating heat exchanger. A heating medium leakage detector
A device for producing food and drink.   The apparatus for producing food or drink according to any one of claims 1 to 5, wherein a cleaning liquid for washing a path through which the food or drink flows is used as a liquid.   The apparatus for producing food or drink according to any one of claims 1 to 5, wherein leakage is detected while producing food or drink as a liquid.

Images