JP5474518B2 - Liquid supply device and cooling water state determination device - Google Patents

Description

  The present invention relates to a liquid supply device that supplies a liquid cooled with cooling water and a cooling water state determination device that determines the state of cooling water, and more particularly to a device that automatically determines the state of cooling water.

  A beverage supply apparatus 110, which is a conventional liquid supply apparatus, will be described with reference to FIG. In the beverage supply device 110, in the water tank 130 for storing the cooling water, the beverage pipe 140 wound in a spiral shape and the outside of the beverage pipe 140 are disposed so that the coolant passes through the inside of the beverage pipe 140. A cooling spirally wound evaporation tube 150 is disposed.

  The beverage supply device 110 is provided with a cooling compressor (not shown) for cooling the refrigerant and circulating it inside the evaporation pipe 150. When the cooling compressor is activated, the refrigerant is cooled. The cooled refrigerant is circulated through the evaporation pipe 150 to cool the cooling water in the water tank 130 through the evaporation pipe 150.

  Ice detection sensors 201 and 202 made of conductor pieces for detecting ice growing around the coil unit 150 are arranged at a distance. When a certain amount of time has elapsed since the cooling water started to cool, ice begins to form around the evaporator tube 150. When the ice detection sensors 201 and 202 detect an ice layer having a predetermined thickness or more, it is determined that the cooling water in the water tank 130 is sufficiently cooled, and the cooling compressor is stopped. Thereafter, when the ice detection sensors 201 and 202 detect that the temperature of the cooling water has risen and the ice around the evaporation pipe 150 has melted, the compressor is started again.

  A cooling water stirring blade 160 rotated by a stirring motor 163 is provided in the water tank 130, and the cooling water is stirred by the rotation of the cooling water stirring blade 160.

JP 2000-88425 A

  The aforementioned beverage supply device 110 has the following points to be improved. In the beverage supply apparatus 110, the cooling water is cooled to a predetermined temperature using the ice detection sensors 201 and 202. Here, the detection target of the ice detection sensors 201 and 202 is often the conductivity of the cooling water. The ice detection sensors 201 and 202 output sensor signals by utilizing the fact that the conductivity of the cooling water in the ice state formed around the coil unit 150 is different from the conductivity of the cooling water in the liquid state. ing. However, when the cooling water is used for a long time, the conductivity of the cooling water changes, and as a result, there may be a case where the difference in conductivity between the ice state and the liquid state cannot be obtained. In this case, the operation of the cooling water cooling compressor cannot be correctly controlled. Therefore, it is necessary to appropriately grasp the water quality of the cooling water. However, there is a point to be improved that the conventional beverage providing apparatus 110 does not have such a function.

  Furthermore, it is necessary to appropriately determine when to replace the cooling water that has been used for a long time with new cooling water. However, there is a point to be improved that the conventional beverage providing apparatus 110 does not have such a function.

  Furthermore, if the cooling water cannot be cooled to the optimum cooling temperature, it may be because the cooling water has deteriorated due to long-term use, or the cooling means such as the compressor is not appropriate, for example, the compressor output is insufficient. There is a point that should be improved that it is not possible to identify the cause of the cooling water cooling, such as whether it is the cause.

  Furthermore, recently, beer with different serving temperatures has appeared due to changes in taste. For example, beer is generally cooled and provided at about 6 to 8 ° C., but it has also begun to provide beer that can be cooled to about −2 ° C. to obtain a more refreshing feeling. In order to provide beer with different temperatures, it is necessary to fill the water tank 122 with cooling water determined for each temperature and cool the beer to a predetermined temperature. In this case, when the water tank 122 is filled with cooling water different from the determined cooling water, the beer may not be cooled to an optimum temperature. However, there is a point to be improved that the type of cooling water used cannot be determined in the beverage supply device 110.

  Therefore, an object of the present invention is to provide a liquid supply device and a cooling water state determination device that automatically determine the state of cooling water.

  Means for solving the problems in the present invention and the effects of the invention will be described below.

  (1) A liquid supply apparatus according to the present invention is a liquid supply apparatus that cools and supplies a predetermined liquid introduced from the outside, and includes a water tank for storing cooling water and a liquid supply pipe through which the predetermined liquid passes. A liquid supply pipe located inside the water tank, external supply means for supplying the liquid that has passed through the liquid supply pipe to the outside, water quality detection means located in the water tank, wherein the water quality of the cooling water Water quality detecting means for detecting the cooling water temperature detecting means for detecting the temperature of the cooling water, correcting means for correcting a value indicating the water quality of the cooling water using the temperature of the cooling water, and the corrected value of the cooling water Using cooling water state determining means for determining the state of the cooling water.

  Thereby, even if it is a case where the quality of cooling water changes with temperature, the state of the quality of cooling water can be judged correctly. Therefore, the provided liquid can always be properly cooled.

  (2) In the liquid supply apparatus according to the present invention, the cooling water state determination means needs to recover the cooling function of the cooling water as the cooling water state using a value indicating the corrected cooling water quality. The cooling function recovery time is determined at a certain time, and even if the quality of the corrected cooling water is the water quality when the cooling water is cooled to a predetermined cooling temperature, the temperature of the cooling water Is not the predetermined cooling temperature, it is determined that it is the cooling function recovery time.

  This is the water quality when the quality of the cooling water is cooled to the predetermined cooling temperature. If the cooling water temperature cannot be cooled to the predetermined cooling temperature, the cause is This is because it can be determined that sufficient cooling capacity cannot be exhibited. Therefore, the provided liquid can always be properly cooled by the cooling function recovery process such as immediately replacing the cooling water. Even when the water quality of the cooling water changes depending on the temperature, the value indicating the water quality of the cooling water is corrected by the temperature of the cooling water, so that the cooling function recovery timing of the cooling water can be accurately determined.

  (3) The liquid supply apparatus according to the present invention further includes liquid temperature detection means for detecting the temperature of the liquid supplied to the outside, and the cooling water state determination means further includes the corrected cooling water. If the water quality is water quality when the cooling water is cooled to a predetermined cooling temperature, and the temperature of the cooling water is the predetermined cooling temperature, the temperature of the liquid is not the predetermined liquid temperature. It is determined that the cooling capacity of the cooling means is insufficient.

  This is the quality of the cooling water when the cooling water is cooled to a predetermined cooling temperature, and when the cooling water is cooled to the predetermined cooling temperature, that is, the cooling water is normally cooled. However, if the liquid is not cooled to the predetermined liquid temperature, it can be determined that the cause is that the cooling capacity of the cooling means for cooling the cooling water is insufficient. It is. Therefore, it is possible to easily determine the cooling capacity of the cooling means.

  (4) In the liquid supply apparatus according to the present invention, the cooling water state determination means determines the type of the cooling water as the state of the cooling water using the corrected water quality value.

  Thereby, the kind of cooling water can be judged automatically.

  (5) The liquid supply apparatus according to the present invention includes: a cooling temperature determination unit that determines a cooling temperature of the cooling water based on the type of the cooling water; and a cooling unit that cools the cooling water based on the cooling temperature. Have.

  Thereby, according to the automatically determined type of cooling water, the cooling water can be automatically cooled to a temperature corresponding to the type of cooling water.

  (6) The liquid supply apparatus according to the present invention includes liquid temperature detection means for detecting the temperature of the liquid supplied to the outside, and the cooling means further uses the detected temperature of the liquid, The cooling water is cooled.

  Thereby, the temperature of cooling water can be automatically adjusted with the temperature of the liquid supplied outside. That is, the liquid provided to the outside can always be cooled to a predetermined temperature.

  (7) In the liquid supply apparatus according to the present invention, the cooling means further includes a refrigerant circulation pipe through which the refrigerant circulates, and circulates the refrigerant circulation pipe located inside the water tank and the refrigerant. A cooling means having a refrigerant circulation means, wherein the cooling water is cooled by the refrigerant, and the refrigerant circulation means is controlled based on the detected temperature of the liquid.

  Thereby, the temperature of the cooling water can be automatically adjusted by adjusting the operation of the refrigerant circulating means.

  (8) The liquid supply apparatus according to the present invention includes cooling water state display means for displaying the state of the cooling water. Accordingly, a warning display that prompts replacement of the cooling water can be output based on a change in the quality of the cooling water.

  (9) In the liquid supply apparatus according to the present invention, the water quality detection means detects the conductivity of the cooling water. Thereby, the state of the cooling water based on the conductivity can be easily determined.

  (10) In the liquid supply apparatus according to the present invention, the water quality detection means detects an ionic current flowing between two electrodes in the cooling water, and reverses the polarity of the electrodes every predetermined time. It is something to be made.

  Thereby, it can prevent that the polarization of an electrode periphery progresses by continuing a detection, and the performance of a water quality detection means falls.

  (11) In the liquid supply apparatus according to the present invention, the water quality detection means and the cooling water temperature detection means are arranged close to each other. Thereby, the quality of the cooling water and the temperature of the cooling water at the same position can be detected. Therefore, the state of the cooling water can be determined more accurately.

  (12) In the liquid supply apparatus according to the present invention, the liquid is beer. Thereby, it is possible to easily determine the state of the cooling water in the beer server that is a liquid providing device that provides beer.

  (13) A cooling water state detection device according to the present invention cools a predetermined liquid introduced from the outside using cooling water, and determines the state of the cooling water of the liquid supply device to be supplied. A water quality detection unit located in a water tank for storing the cooling water of the liquid supply device, wherein the water quality detection unit detects the water quality of the cooling water, and the cooling water temperature detection unit detects the temperature of the cooling water. , Correction means for correcting the value indicating the quality of the cooling water using the temperature of the cooling water, and cooling water state determination means for determining the state of the cooling water using the corrected cooling water value.

  Thereby, even if it is a case where the quality of cooling water changes with temperature, the state of the quality of cooling water can be judged correctly. Therefore, the provided liquid can always be properly cooled.

  (14) In the cooling water state detection device according to the present invention, the cooling water state determination means includes:

  Using the value indicating the water quality of the corrected cooling water, the cooling function recovery time, which is the time when the cooling function of the cooling water needs to be recovered as the state of the cooling water, is determined. Even if the quality of the cooling water is the quality of the water when the cooling water is cooled to a predetermined cooling temperature, the cooling function recovery time is when the temperature of the cooling water is not the predetermined cooling temperature. to decide.

  This is the water quality when the quality of the cooling water is cooled to the predetermined cooling temperature. If the cooling water temperature cannot be cooled to the predetermined cooling temperature, the cause is This is because it can be determined that sufficient cooling capacity cannot be exhibited. Therefore, the provided liquid can always be properly cooled by the cooling function recovery process such as immediately replacing the cooling water. Even when the water quality of the cooling water changes depending on the temperature, the value indicating the water quality of the cooling water is corrected by the temperature of the cooling water, so that the cooling function recovery timing of the cooling water can be accurately determined.

  (15) The cooling water state detection device according to the present invention further includes liquid temperature detection means for detecting the temperature of the liquid supplied to the outside, and the cooling water state determination means further includes the corrected cooling. When the water quality is water quality when the cooling water is cooled to a predetermined cooling temperature, and the cooling water temperature is the predetermined cooling temperature, the temperature of the liquid is a predetermined liquid temperature. If not, it is determined that the cooling capacity of the cooling means is insufficient.

  This is the quality of the cooling water when the cooling water is cooled to a predetermined cooling temperature, and when the cooling water is cooled to the predetermined cooling temperature, that is, the cooling water is normally cooled. However, if the liquid is not cooled to the predetermined liquid temperature, it can be determined that the cause is that the cooling capacity of the cooling means for cooling the cooling water is insufficient. It is. Therefore, it is possible to easily determine the cooling capacity of the cooling means.

  (16) In the cooling water state detection device according to the present invention, the cooling water state determination means determines the type of the cooling water as the cooling water state, using the corrected water quality value.

  Thereby, the kind of cooling water can be judged automatically.

  (17) The cooling water state detection device according to the present invention includes cooling water state display means for displaying the determined state of the cooling water. Thereby, based on the change in the quality of the cooling water, a warning display for prompting the replacement of the cooling water can be output.

  (18) In the cooling water state detection device according to the present invention, the water quality detection means detects the conductivity of the cooling water. Thereby, the state of the cooling water based on the conductivity can be easily determined.

  (19) In the cooling water state detection device according to the present invention, the water quality detection means detects an ionic current flowing between two electrodes in the cooling water, and the polarity of the electrode at every predetermined time. Is reversed. Thereby, it can prevent that the polarization of an electrode periphery progresses by continuing a detection, and the performance of a water quality detection means falls.

  (20) In the cooling water state detection device according to the present invention, the water quality detection means and the cooling water temperature detection means are arranged close to each other. Thereby, the quality of the cooling water and the temperature of the cooling water at the same position can be detected. Therefore, the state of the cooling water can be determined more accurately.

  (21) In the cooling water state detection device according to the present invention, the liquid is beer. Thereby, it is possible to easily determine the state of the cooling water in the beer server that is a liquid providing device that provides beer.

  Here, the correspondence between the components of the liquid supply apparatus according to the present invention and the components in the embodiment is shown. The liquid supply device corresponds to the beer server 1, the beer server 1A, and the beer server 1B. The water tank is the water tank 22, the liquid supply line is the beer cooling pipe 30, the external supply means is the pouring cock 20, the cooling means is the refrigeration unit 25, the CPU 191, the memory 192, and the input / output circuit 196, and the refrigerant circulation line is The evaporating pipe 27, the refrigerant circulation means correspond to the compressor 23, the water quality detection means corresponds to the icing sensor 51, the cooling water temperature detection means corresponds to the cooling water temperature sensor 53, and the liquid temperature detection means corresponds to the beer temperature sensor 54, respectively. .

  The cooling water state display means corresponds to the cooling water state display panel 55, the cooling water replacement warning lamp 57, and the cooling water type display panel 59.

  Further, the correction unit, the cooling water state determination unit, and the cooling temperature determination unit correspond to the control circuit 19. Furthermore, the liquid corresponds to beer.

  “Recovering the cooling function of cooling water” means to increase the cooling capacity to at least the standard when the cooling capacity, which is the capacity required for cooling the object to be cooled, is inferior to the standard. It is a concept including replenishment and replacement of cooling water, replenishment and removal of predetermined components, and the like.

  “The cooling capacity of the cooling means is insufficient” means that the cooling means cannot cool the object to be cooled to a predetermined temperature under a predetermined condition. For example, in the process of circulating the refrigerant to cool the object to be cooled, the cooling water has a normal quality but the cooling water temperature is not normal. It is a concept including Further, in the process of cooling the liquid supplied to the outside with the cooling liquid, the supply amount of the external supply liquid when the temperature of the liquid supplied to the outside is not normal although the water quality and temperature of the cooling liquid are both normal. This is a concept including a small size of the liquid supply device such as a short external liquid supply line.

It is a figure which shows the external appearance structure regarding the beer server 1 which concerns on this invention. It is a figure which shows the internal structure of the beer server 1 which concerns on this invention. 2 is a diagram illustrating a hardware configuration of a control circuit 19. FIG. It is a flowchart which shows operation | movement of the control circuit 19 of the beer server 1. FIG. It is a figure showing appearance composition about beer server 1A concerning the present invention. It is a figure which shows the internal structure of 1 A of beer servers which concern on this invention. It is a flowchart which shows operation | movement of the control circuit 19 of 1 A of beer servers. It is a figure which shows the external appearance structure regarding the beer server 1B which concerns on this invention. It is a figure which shows the data structure of the cooling water information DB memorize | stored in the control memory 192 of the beer server 1B. It is a figure which shows the data structure of cooling temperature information DB memorize | stored in the memory 192 of the beer server 1B. It is a flowchart which shows operation | movement of the control circuit 19 of beer server 1B. It is a figure which shows the external appearance structure regarding 1 C of handy type cooling water state detection apparatuses which concern on this invention. It is a figure which shows the drink supply apparatus 110 which is the conventional liquid supply apparatus.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

First Configuration Configuration of Beer Server 1 FIG. 1 shows an external configuration of a beer server 1 that is an embodiment of the liquid supply apparatus according to the present invention. As shown in FIG. 1, a beer barrel 2 for storing beer is connected to the beer server 1 via a beer supply pipe joint 3 and a beer supply pipe 4. Further, carbon dioxide gas is supplied from the carbon dioxide gas cylinder 5 to the gas hose joint 8 through the pressure regulating valve 6 and each gas hose 7. The beer in the beer barrel 2 pressed by the carbon dioxide gas supplied from the gas hose joint 8 is supplied to the beer supply pipe 4 through the beer supply pipe joint 3.

  Next, the internal configuration of the beer server 1 will be described with reference to FIG. As shown in FIG. 2, the beer server 1 is covered with an outer case 10 on the outer side of the main body and covered with a lid 11 on the upper side. A pair of supply pipe connecting members 12 to which beer supply pipes 4 for supplying beer are connected are provided on the front surface of the outer case 10. The supply pipe connecting member 12 is a substantially L-shaped pipe joint, and the end of the beer supply pipe 4 is inserted into the supply pipe connecting member 12 from below. Thereby, the end of the beer supply pipe 4 is connected to the supply pipe connecting member 12.

  In addition, a tray 16 on which a net-like plate member 15 (see FIG. 1) is placed on the upper surface is attached to the front side of the supply pipe connecting member 12.

  A pair of left and right pouring cocks 20 are attached to the upper front portion of the beer server 1. Further, leg members 13 are fixedly provided at four positions on the lower surface of the main body. The beer server 1 is disposed on a counter or the like in the store via the leg member 13.

  Moreover, as shown in FIG. 2, the water tank 22 which stored the cooling water is arrange | positioned at the upper half part of the main body. Below the water tank 22, a refrigeration unit 25 including a compressor 23, a condenser 24, a cooling fan (not shown) for cooling the condenser 24, and the like is provided. An evaporation pipe 27 is connected to the refrigeration unit 25. The evaporation pipe 27 is spirally attached to the inner wall portion of the water tank 22 via a fixture 28.

  The refrigerant circulates along a path that goes from the refrigeration unit 25 to the evaporation pipe 27 to the refrigeration unit 25. The refrigerant evaporates when it passes through the evaporation pipe 27 in the water tank 22 and exchanges heat with the cooling water. Thereby, ice is formed around the evaporation tube 27. When a predetermined amount of ice is formed, it is determined that the cooling water has been sufficiently cooled. For example, the predetermined amount of ice is 3 cm from the periphery of the evaporation tube 27. Thus, the temperature of the cooling water is controlled by the thickness of the ice formed around the evaporation pipe 27.

  An ice accretion sensor 51 is installed in the vicinity of the evaporation tube 27 at a predetermined position. The icing sensor 51 is a sensor for detecting whether or not a predetermined amount of ice has been formed around the evaporation pipe 27, that is, whether or not the cooling water has been cooled to a predetermined temperature.

  The icing sensor 51 is attached to the evaporation tube 27 at a predetermined distance, for example. In this case, when sufficient ice is not formed around the evaporation tube 27, that is, when ice having a predetermined thickness is not formed, the ice adhesion sensor 51 detects the conductivity of the cooling water. Thereafter, when cooling proceeds and sufficient ice is formed around the evaporation tube 27, that is, when ice having a predetermined thickness is formed, the ice adhesion sensor 51 detects the conductivity of the ice. Since the conductivity of the cooling water and the conductivity of the ice are different, the ice adhesion sensor 51 detects whether or not a predetermined amount of ice has been formed by detecting a change in the conductivity, that is, the cooling water has a predetermined temperature. It is determined whether or not it has been cooled down.

  The icing sensor 51 detects the electrical resistance value of the cooling water or the like, that is, the conductivity based on the ionic current flowing between the two probe electrodes.

  An air filter 26 is attached to the front side of the condenser 24.

  A pair of beverage pipes 29 made of stainless steel pipes whose supply side end portions are connected to the pair of supply pipe connecting members 12 are embedded in the heat insulating material on the bottom surface of the water tank 22. And the beverage pipe 29 is derived | led-out upwards from the inner bottom face part of the water tank 22, and is connected to the beer cooling pipe 30 made from a stainless steel pipe, respectively. The beer cooling pipe 30 is formed in a spiral shape, and is attached to the inside of the evaporation pipe 27 in the water tank 22 via a fixture. The beer fed from the beverage pipe 29 is sent from the lower side to the upper side of the beer cooling pipe 30. The beer is cooled to a predetermined temperature by the cooling water while passing through the beer cooling pipe 30.

  The extraction side end of the beer cooling pipe 30 is connected to the extraction end of the extraction cock 20. The cooled beer is poured into a beer mug or the like through the pouring cock 20.

  As described above, the temperature of the cooling water can be controlled by the thickness of ice formed around the evaporation pipe 27. On the other hand, the temperature of beer can be controlled by the temperature of the cooling water. That is, the temperature of beer can be controlled by the thickness of ice formed around the evaporation tube 27.

  The cooling water temperature sensor 53 is disposed in the vicinity of the ice adhesion sensor 51. The cooling water temperature sensor 53 detects the temperature of the cooling water in the water tank 22. The conductivity detected by the icing sensor 51 varies depending on the temperature of the cooling water. For this reason, in order to accurately determine the quality of the cooling water using the conductivity, it is desirable to correct the detected conductivity using the temperature of the cooling water.

  The icing sensor 51 determines whether or not a predetermined amount of ice has been formed around the evaporation pipe 27, that is, whether or not the cooling water has been cooled to a predetermined temperature. The change in conductivity is used. The problem here is that the conductivity of the cooling water changes depending on the temperature of the cooling water. Therefore, since the conductivity of the cooling water changes depending on the temperature, in order to accurately grasp the state of the cooling water using the conductivity, it is necessary to correct the conductivity of the cooling water based on the temperature. Therefore, a cooling water temperature sensor 53 is arranged to detect the temperature of the cooling water.

  Beer is supplied from below the water tank 22 to the beer cooling pipe 30 via the beverage pipe 29. Since beer having a relatively high temperature is supplied from under the water tank 22, the temperature of the cooling water is relatively high in the lower part of the water tank 22 as compared with other parts. For this reason, in order to make the temperature of the water tank 22 uniform, a stirring motor 36 and a stirring blade 34 are provided. The stirring motor 36 rotationally drives the stirring blade 34. The cooling water is agitated by the rotation of the agitating blade 34, and the temperature of the water tank 22 is made uniform.

  As shown in FIG. 1, the exterior case 10 is provided with a cooling water state display panel 55. The cooling water state display panel 55 has LEDs 551 to 555 which are a plurality of light emitting means. Note that the LEDs 551 to 555 that emit light differ depending on the state of the cooling water. Thereby, the state of the cooling water in the water tank 22 can be easily grasped.

  The control circuit 19 (not shown) is disposed in the lower half of the water tank 22. The control circuit 19 is electrically connected to the ice accretion sensor 51, the cooling water temperature sensor 53, the cooling water type display panel 55, and the compressor 23, and can transmit and receive information.

2. Hardware Configuration of Control Circuit 19 The hardware configuration of the control circuit 19 is shown in FIG. The control circuit 19 includes a CPU 191, a memory 192, a power supply circuit 193, and an input / output circuit 196.

  The CPU 191 performs processing based on other applications such as a coolant management program recorded in the memory 192. The memory 192 stores and holds programs such as a cooling water management program. The memory 192 provides a work area for the CPU 191.

  The power supply circuit 193 supplies power to the CPU 191 and the like. The input / output circuit 196 obtains the sensor value from the icing sensor 51 as icing sensor information and the sensor value from the cooling water temperature sensor 53 as cooling water temperature information. The input / output circuit 196 transmits and receives LED control information for controlling lighting of the cooling water state display panel 55.

Operation of Second Control Circuit 19 The operation of the CPU 191 of the control circuit 19 will be described with reference to the flowchart shown in FIG. When the CPU 191 receives the icing sensor information from the icing sensor 51 (S401), the CPU 191 calculates the conductivity of the cooling water from the value of the icing sensor information (S403). The CPU 191 acquires cooling water temperature information from the cooling water temperature sensor 53 (S405). The CPU 191 performs temperature correction on the calculated conductivity value using the acquired value of the cooling water temperature information, and calculates the temperature correction conductivity at the reference temperature (S407). Note that the rate of change of conductivity with respect to the temperature necessary for calculating the temperature-corrected conductivity is stored in the memory 192 in advance.

  The CPU 191 acquires the upper limit appropriate conductivity indicating the upper limit and the lower limit appropriate conductivity of the range of the appropriate coolant conductivity at the reference temperature, and the lower limit appropriate conductivity (S409). The upper limit appropriate conductivity and the lower limit appropriate conductivity are stored in the memory 192 in advance.

  When the CPU 191 determines that the temperature-corrected conductivity is larger than the upper limit appropriate conductivity (S411), the CPU 191 determines that the ion concentration of the cooling water is too high and turns on the excessive LED lamp 555 (S413). If the CPU 191 determines that the temperature-corrected conductivity is smaller than the lower limit appropriate conductivity (S415), the CPU 191 determines that the cooling water ion concentration is insufficient, and turns on the insufficient LED lamp 551 (S417). If the CPU 191 determines that the temperature correction conductivity is lower than the upper limit appropriate conductivity and the temperature correction conductivity is higher than the lower limit appropriate conductivity, the ion concentration of the cooling water is in a good state. The good LED lamp 553 is turned on (S419).

  CPU191 repeats the process from step S401 to S419 until the end (S421).

  Thus, by correcting the conductivity of the cooling water according to the temperature, the state of the cooling water can be grasped more accurately without being influenced by the installation environment of the beer server. Thus, for example, when the beer server is in an installation environment where it is exposed to direct sunlight and is in a high temperature state, the conductivity of the cooling water is higher than that in a standard installation environment. Therefore, if installed in a standard installation environment, even if it is determined that the conductivity is low, that is, the ion concentration is insufficient, it is determined that the conductivity is appropriate, that is, the ion concentration is appropriate. obtain.

On the other hand, in the beer server 1 in the present embodiment, the temperature-corrected conductivity is used regardless of the installation environment of the beer server 1, so that the state of the cooling water can be accurately determined.

  In the first embodiment, the state of the cooling water is more accurately grasped by correcting the detected conductivity of the cooling water using the temperature of the cooling water. On the other hand, 1 A of beer servers in a present Example grasp | ascertain the state of a cooling water more correctly by using the electrical conductivity of a cooling water, and the cooling temperature of a cooling water.

  In the following, the same components as those of the beer server 1 in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

1st structure The external appearance structure of 1 A of beer servers which are one Example of the liquid supply apparatus which concerns on this invention is shown in FIG.

  As shown in FIG. 5, the outer case 10 is provided with a cooling water replacement warning lamp 57 and a cooling capacity deficient lamp 58. For the cooling water replacement warning lamp 57 and the cooling capacity shortage lamp 58, for example, light emitting means such as an LED is used. It is possible to easily grasp whether or not it is time to replace the cooling water in the water tank 22 by the emission of the cooling water replacement warning lamp 57. Further, the light emission of the cooling capacity deficient lamp 58 makes it easy to grasp that the compressor 23 currently in use is deficient in cooling capacity in the current use situation.

  Next, the internal configuration of the beer server 1 will be described with reference to FIG. The beer temperature sensor 54 is disposed in the vicinity of the connection portion between the beer cooling pipe 30 and the extraction cock 20. The beer temperature sensor 54 detects the temperature of the beer that is actually provided to the customer, that is, the temperature of the beer supplied from the dispensing cock 20.

  The control circuit 19 (not shown) is disposed in the lower half of the water tank 22. The control circuit 19 is electrically connected to the ice accretion sensor 51, the cooling water temperature sensor 53, the cooling water replacement warning lamp 57, the cooling capacity deficient lamp 58, and the compressor 23, and can transmit and receive information. .

  About another structure including an external structure and an internal structure, it is the same as that of the beer server 1 in Example 1. FIG.

Operation of Second Control Circuit 19 The operation of the CPU 191 of the control circuit 19 will be described using the flowchart shown in FIG. When the CPU 191 receives the icing sensor information from the icing sensor 51 (S601), the CPU 191 calculates the conductivity of the cooling water from the value of the icing sensor information (S603). The CPU 191 acquires cooling water temperature information from the cooling water temperature sensor 53 (S605). The CPU 191 calculates temperature-corrected conductivity obtained by performing temperature correction on the calculated conductivity value, using the acquired value of the coolant temperature information (S607).

  The CPU 191 determines whether or not the value of the temperature-corrected conductivity is a value of conductivity when the cooling water is frozen (hereinafter referred to as frozen conductivity) (S609). Thereby, the CPU 191 determines whether or not a predetermined amount of ice is formed around the evaporation pipe 27. The frozen conductivity is stored in the memory 192 in advance.

  When the CPU 191 determines that the value of the temperature correction conductivity is the value of the frozen conductivity, the CPU 191 acquires the coolant temperature information from the coolant temperature sensor 53 (S611). The CPU 191 determines whether or not the value of the acquired cooling water temperature information is higher than a preset cooling temperature (hereinafter referred to as a set cooling temperature) (S613). The set cooling temperature is stored in the memory 192 in advance.

  If the CPU 191 determines that the value of the acquired cooling water temperature information is higher than the set cooling temperature, the CPU 191 turns on the cooling water replacement warning lamp 57 (S615). The fact that the cooling water exhibits the frozen conductivity even though the set cooling temperature is not reached indicates that the cooling water has deteriorated. Therefore, since it is desirable to replace the cooling water, the cooling water replacement warning lamp 57 is turned on to prompt the user to replace the cooling water.

  If CPU 191 determines that the value of the coolant temperature information acquired in step S613 is equal to or lower than the set cooling temperature, CPU 191 acquires beer temperature information from beer temperature sensor 54 (S617). The CPU 191 determines whether or not the value of the acquired beer temperature information is higher than a preset beer temperature (hereinafter referred to as a set beer temperature) (S619). The set beer temperature is stored in the memory 192 in advance.

  If the CPU 191 determines that the value of the acquired beer temperature information is higher than the set beer temperature, the CPU 191 turns on the cooling capacity deficient lamp 58 (S621). Even though the cooling water is cooled to the set cooling temperature, the fact that the beer is not cooled to the set beer temperature indicates that the cooling capacity of the cooling means including the compressor 23 is insufficient. Yes. Therefore, since it is desirable to improve the cooling capacity of the cooling means, such as replacing the compressor 23, the cooling capacity shortage lamp 58 is turned on, and the user checks the capacity of the compressor (replaces in some cases) and the air filter 26. Are inspected, and the amount of refrigerant circulating through the refrigeration unit 25 and the evaporation pipe 27 is checked (replenished in some cases).

  If the CPU 191 determines that it is not the frozen conductivity in step S609, and if it determines that the value of the beer temperature information acquired in step S619 is not higher than the preset beer temperature, the cooling water replacement warning lamp 57 or the cooling capacity The process after step S601 is executed without turning on the shortage lamp 58.

  The CPU 191 repeats the processing from step S601 to S621 until the end (S623).

  Thus, the state of the cooling water can be grasped more accurately by comparing the conductivity of the cooling water and the cooling temperature of the cooling water. For example, when low conductivity is detected, such as when the cooling water is frozen from a beer server, it is generally considered that the cooling water has been cooled to a predetermined temperature. On the other hand, when the ion concentration of the cooling water is sufficiently low, that is, when the cooling water is deteriorated, the same low conductivity can be detected, so the state of the cooling water may be misjudged. There is.

Therefore, the beer server 1A in the present embodiment uses not only the conductivity of the cooling water but also the temperature of the cooling water, thereby preventing erroneous determination and more accurately determining the state of the cooling water.

  In the first embodiment, the state of the cooling water is more accurately grasped by correcting the detected conductivity of the cooling water using the temperature of the cooling water. On the other hand, the beer server 1B in the present embodiment determines the type of cooling water from the conductivity of the cooling water subjected to temperature correction.

  In the following, the same components as those of the beer server 1 in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

First Configuration Configuration of Beer Server 1 FIG. 8 shows an external configuration of a beer server 1B that is an embodiment of the liquid supply apparatus according to the present invention.

  As shown in FIG. 8, the exterior case 10 is provided with a cooling water type display panel 59. The cooling water type display panel 59 has LEDs 591 to 595 which are one or a plurality of light emitting means. The LEDs 591 to 595 that emit light differ depending on the type of cooling water. Thereby, it is possible to easily grasp what the cooling water in the water tank 22 is.

  Other configurations including the external configuration and the internal configuration are the same as those of the beer server 1A in the second embodiment.

2. Hardware Configuration of Control Circuit 19 The hardware configuration of the control circuit 19 is the same as that of the first embodiment (see FIG. 3). However, the memory 192 stores and holds a cooling water information database (hereinafter, cooling water information DB) and a set cooling temperature information database (hereinafter, set cooling temperature information DB). The cooling water information DB and the set cooling temperature information DB will be described later.

Second Data The cooling water information DB and the set cooling temperature information DB stored in the memory 192 by the control circuit 19 of the beer server 1 will be described.

1. Cooling water information DB
The cooling water information is information indicating characteristics that specify cooling water. The data structure of the cooling water information DB will be described with reference to FIG.

  The cooling water information DB has a cooling water column, a pH column, and a conductivity column. In the cooling water column, a name, a number and the like for specifying the cooling water are described. The pH column describes the pH of the cooling water. The conductivity column describes the conductivity of the cooling water. In addition, the pH and electrical conductivity of cooling water prepare the value measured beforehand, and the value of the range accept | permitted from the original cooling water specification.

2. Set cooling temperature information DB
The set cooling temperature information is information indicating a set cooling temperature that is a cooling temperature determined in advance for each cooling water. The data structure of the set cooling temperature information DB will be described with reference to FIG.

  The cooling water information DB has a cooling water column and a set cooling temperature column. In the cooling water column, a name, a number and the like for specifying the cooling water are described. The set cooling temperature column describes the set cooling temperature for each cooling water.

Operation of Third Control Circuit 19 The operation of the CPU 191 of the control circuit 19 will be described using the flowchart shown in FIG. When receiving the ice deposition sensor information from the ice deposition sensor 51 (S1101), the CPU 191 calculates the conductivity of the cooling water (S1103). The CPU 191 receives the coolant temperature information from the coolant temperature sensor 53 (S1105). The CPU 191 calculates a temperature-corrected conductivity obtained by performing temperature correction on the calculated conductivity value using the acquired value of the cooling water temperature information (S1107).

  CPU191 searches cooling water information DB using temperature correction | amendment electrical conductivity, and specifies the cooling water of the water tank 22 (S1109). The CPU 191 stores information for specifying the specified cooling water in the memory 192 (S1111). Information specifying the cooling water includes a name, a number, and the like.

  The CPU 191 transmits LED control information for displaying the corresponding LED from the LEDs 551 to 555 of the cooling water type display panel 55 (S1113). In a present Example, the kind of cooling water and the display of LED551-555 are matched previously. For example, the LED 551 is turned on in the cooling water A, the LED 553 is turned on in the cooling water B, and the LED 555 is turned on in the cooling water C.

  Further, the CPU 191 receives beer supply temperature information from the beer temperature sensor 54 every predetermined time (S1115) (S1117). The CPU 191 acquires cooling water temperature information from the cooling water temperature sensor 53 (S1119).

  If the CPU 191 determines that the value of the beer supply temperature information acquired in step S1117 is higher than the value of the cooling water temperature information acquired in step S1119 (S1121), the compressor operation control information indicating the start of operation is transmitted to the compressor 23. (S1123). On the other hand, if the CPU 191 determines in step S1121 that the value of the beer supply temperature information acquired in step S1117 is equal to or less than the value of the cooling water temperature information acquired in step S1119, the CPU 191 maintains the state as it is.

The CPU 191 repeats the processes of steps S1101 to S1123 (S1125).

  In the first embodiment described above, the icing sensor 51 and the cooling water temperature sensor 53 are installed in the beer server 1 to determine the state of the cooling water. On the other hand, in a present Example, only the structure for grasping | ascertaining the state of the cooling water in the beer server 1 is taken out, and it is set as the cooling water state detection apparatus.

  In the following, the same reference numerals as those in the first embodiment are given to the same configurations as those in the first embodiment.

  FIG. 12 shows an external configuration of a handy type cooling water state detection device 1C which is an embodiment of the cooling water state detection device according to the present invention. The cooling water state detection device 1 </ b> C includes a main body part B and a sensor part U. The main body B has a housing 50, a detection start button 56, and a cooling water state display panel 55. The cooling water state display panel 55 has a plurality of LEDs 551 to 555 as light emitting means, as in the first embodiment. The LEDs 551 to 555 that emit light differ depending on the state of the cooling water. Thereby, the state of the cooling water in the water tank 22 can be easily grasped.

  The sensor unit U includes an ice accretion sensor 51 and a cooling water temperature sensor 53. In the present embodiment, the ice accretion sensor 51 and the cooling water temperature sensor 53 are arranged in close proximity.

A control circuit 19 is disposed inside the housing 50 of the main body B. The operation of the control circuit 19 is the same as that in the first embodiment.

[Other Examples]
(1) Conductivity: In Examples 1 to 4 described above, the conductivity of the cooling water was used as a value representing the quality of the cooling water. However, the conductivity represents the state of the cooling water and changes depending on the temperature. For example, it is not limited to the example. For example, it may be the pH of the cooling water.

  (2) Ice accretion sensor 51: In the above-described first to fourth embodiments, the ionization sensor 51 detects the ionic current of the cooling water and calculates the conductivity. However, the quality of the cooling water used is detected. If possible, it is not limited to the examples. For example, it may be one that detects the pH of the cooling water.

  (3) Cooling water state: In Example 1 described above, the state of the cooling water is determined using the ion concentration of the cooling water. It is not limited to things. For example, a conductivity meter or a refractometer may be used.

  (4) Arrangement position of each sensor: In the above-described first to third embodiments, the ice accretion sensor 51, the cooling water temperature sensor 53, and the beer temperature sensor 54 are arranged at the positions shown in FIGS. However, the position is not limited to the illustrated example as long as the function of each sensor can be exhibited.

  (5) Cooling water state display panel 55: In the above-described first embodiment, the cooling water state display panel 55 includes the three LEDs 551 to 555. It is not limited to those. For example, a liquid crystal display panel that can display predetermined characters may be used. In this case, the state of the cooling water may be displayed on the liquid crystal display panel, and the state of the cooling water may be displayed.

  Further, the cooling temperature set for the cooling water or the temperature detected by the cooling water temperature sensor 53 may be displayed on the liquid crystal display panel.

  (6) Cooling water replacement warning lamp 57: In the above-described second embodiment, the cooling water replacement warning lamp 57 displays whether or not the cooling water needs to be replaced by turning on / off the LED. However, the present invention is not limited to the example as long as it can display whether or not the cooling water needs to be replaced. For example, a liquid crystal display panel that can display predetermined characters may be used. In this case, a warning may be displayed to the user by displaying on the liquid crystal display panel that the cooling water needs to be replaced.

  Further, other information on the liquid crystal display panel, for example, the cooling temperature set for the cooling water, the conductivity of the cooling water detected by the ice accretion sensor 51, the temperature of the cooling water detected by the cooling water temperature sensor 53 Etc. may be displayed.

  (7) Cooling water type display panel 59: In the above-described third embodiment, the cooling water type display panel 59 has the three LEDs 591 to 595. It is not limited to those. For example, a liquid crystal display panel that can display predetermined characters may be used. In this case, the type of the cooling water may be displayed by displaying the name of the cooling water on the liquid crystal display panel.

  Further, the cooling temperature set for the cooling water or the temperature detected by the cooling water temperature sensor 53 may be displayed on the liquid crystal display panel.

  (8) Operation control of the compressor 23: In the above-described third embodiment, when the beer supply temperature detected by the beer temperature sensor 54 is higher than the cooling temperature set in advance for the cooling water, the compressor 23 is controlled. However, a warning indicating that the supply temperature of beer and the set cooling temperature of cooling water do not match may be displayed.

  Further, when the temperature of the cooling water detected by the cooling water temperature sensor 53 is higher than the cooling temperature set in advance for the cooling water, the compressor 23 may be controlled to start the operation. In addition, a warning indicating that the set cooling temperature of the cooling water does not match the actual cooling water temperature may be displayed.

  (9) Supply beer temperature display panel: In Example 1 described above, a supply beer temperature display panel such as a liquid crystal panel that can recognize the temperature of the beer detected by the cooling water temperature sensor 53 from the outside may be installed. Good. By installing the supply beer temperature display panel, it is possible to easily grasp the current temperature of the beer to be supplied, and therefore it is possible to easily grasp the mistake of adding cooling water.

  (10) Cooling water state detection device 1: In the above-described embodiment 4, the handy type cooling water state detection device has a configuration necessary for determining the state of the cooling water in the embodiment 1, It is good also as what has a structure required in order to judge the state of the cooling water in Example 2 and Example 3. FIG.

  (11) Cooling water cooling capacity determination: In the above-described Examples 1 to 4, the state of the cooling water was determined using the quality of the cooling water. Furthermore, the cooling capacity of the cooling water may be determined from the quality of the cooling water. In this case, a cooling water quality information DB associating the cooling water quality information constituted by elements (for example, pH, conductivity) that determine the cooling water cooling capacity and the cooling capacity is prepared in advance, and the cooling water quality The information and the information of the water quality sensor such as the ice accretion sensor 51 are compared to determine whether or not the cooling water in the water tank has a necessary component composition, and whether or not the cooling water has the necessary cooling capacity. Judgment should be made.

  The cooling water contains various components in order to maintain the cooling capacity. For example, the cooling water that does not freeze below zero degree includes components for maintaining its function, such as propylene glycol.

  On the other hand, if the cooling water is used for a long time, the components contained in the cooling water are volatilized and decomposed to change the component ratio, or the cooling water is diluted with condensed water and the component concentration is lowered. The component of the cooling water may change, and the original cooling capacity may be lost. Therefore, the deterioration of the quality of the cooling water can be detected by observing the quality of the cooling water over time. Also. It is also possible to prompt the user of the liquid providing apparatus such as a beer server to replace the cooling water.

  (12) Centralized management by network: In the above-described first to third embodiments, each control circuit 19 of the beer servers 1, 1A, 1B determines the state of the cooling water. Only information necessary for judging the state of the cooling water, for example, only the information acquired by the ice accretion sensor 51, the cooling water temperature sensor 53, and the beer temperature sensor 54, is acquired by each beer server and the network. In the connected management apparatus, the state of the cooling water in each beer server may be determined based on the information acquired by each beer server.

(13) Beer: In the above-described Examples 1 to 3, the beer server 1 that supplies beer is illustrated, but the beer server 1 is not limited to the example as long as it supplies liquid. For example, it may be a liquid supply device that supplies carbonated drinks and soft drinks.

The liquid cooling device according to the present invention can be used, for example, in a beer server system having a beer server that supplies beer.

DESCRIPTION OF SYMBOLS 1 ... Beer server 22 ... Water tank 23 ... Compressor 24 ... Condenser 25 ... Refrigeration unit 27 ... Evaporation pipe 19 ... ··· Control circuit 29 ··· Beverage pipe 30 ··· Beer cooling pipe 51 ··· Ice deposit sensor 53 ··· Cooling water temperature sensor 55 ··· Cooling water status display Panel 1A ... Beer server 54 ... Beer temperature sensor 57 ... Cooling water replacement warning lamp 58 ... Insufficient cooling capacity lamp 1B ... Beer server 59 ... ... Cooling water type display panel 1C ... Cooling water state detection device B ... Body part U ... Sensor part

Claims (17)

A liquid supply apparatus that cools and supplies a predetermined liquid introduced from the outside,
A water tank for storing cooling water,
A liquid supply line through which a predetermined liquid passes, the liquid supply line located inside the water tank;
An external supply means for supplying the liquid that has passed through the liquid supply pipe line to the outside;
Water quality detection means located in the water tank, wherein the water quality detection means detects the quality of the cooling water;
Cooling water temperature detecting means for detecting the temperature of the cooling water;
Correction means for correcting the value indicating the water quality of the cooling water using the temperature of the cooling water;
Cooling water state determination means for determining the state of the cooling water using the corrected water quality value;
A cooling means for cooling the cooling water based on the corrected cooling water quality;
In a liquid supply apparatus having
The cooling water state determination means includes
The value indicating the water quality of the corrected cooling water is used to determine a cooling function recovery time that is a time when the cooling function of the cooling water needs to be recovered as the state of the cooling water. Even if the quality of the cooling water is the quality of the water when the cooling water is cooled to a predetermined cooling temperature, the cooling function recovery time is when the temperature of the cooling water is not the predetermined cooling temperature. To judge,
A liquid supply device. The liquid supply apparatus according to claim 1, further comprising:
Liquid temperature detecting means for detecting the temperature of the liquid supplied to the outside;
Have
The cooling water state determination means further includes:
When the corrected cooling water quality is the water quality when the cooling water is cooled to a predetermined cooling temperature, and the cooling water temperature is the predetermined cooling temperature, the temperature of the liquid is predetermined. If it is not the liquid temperature, it is determined that the cooling capacity of the cooling means is insufficient,
A liquid supply device. In any one of the liquid supply apparatuses according to claim 1 or claim 2,
Cooling water state display means for displaying the determined state of the cooling water;
A liquid supply apparatus having In any one of the liquid supply apparatuses according to claims 1 to 3,
The water quality detection means includes
Detecting the conductivity of the cooling water;
A liquid supply device. In the liquid supply apparatus according to claim 4,
The water quality detection means includes
Detecting an ionic current flowing between two electrodes in the cooling water, and reversing the polarity of the electrodes every predetermined time,
A liquid supply device. In any one of the liquid supply apparatuses according to claims 1 to 5,
The water quality detection means and the cooling water temperature detection means are arranged close to each other;
A liquid supply device. In any one of the liquid supply apparatuses according to claims 1 to 6,
The liquid is beer;
A liquid supply device. A cooling water state determination device that cools a predetermined liquid introduced from outside using cooling water and determines a state of the cooling water of a liquid supply device to be supplied,
Water quality detection means located in a water tank for storing the cooling water of the liquid supply device, wherein the water quality detection means detects the quality of the cooling water;
Cooling water temperature detecting means for detecting the temperature of the cooling water;
Correction means for correcting the value indicating the water quality of the cooling water using the temperature of the cooling water;
Cooling water state determination means for determining the state of the cooling water using the corrected cooling water value;
In the cooling water state determination device having
The cooling water state determination means includes
The value indicating the water quality of the corrected cooling water is used to determine a cooling function recovery time that is a time when the cooling function of the cooling water needs to be recovered as the state of the cooling water. Even if the quality of the cooling water is the quality of the water when the cooling water is cooled to a predetermined cooling temperature, the cooling function recovery time is when the temperature of the cooling water is not the predetermined cooling temperature. To judge,
A cooling water state judging device characterized by the above. In the cooling water state determination device according to claim 8, further,
Liquid temperature detecting means for detecting the temperature of the liquid supplied to the outside;
Have
The cooling water state determination means further includes:
When the corrected cooling water quality is the water quality when the cooling water is cooled to a predetermined cooling temperature, and the cooling water temperature is the predetermined cooling temperature, the temperature of the liquid is predetermined. If it is not the liquid temperature, it is determined that the cooling capacity of the cooling means for cooling the cooling water of the liquid providing device is insufficient.
A cooling water state judging device characterized by the above. In the cooling water state determination device according to claim 8,
The cooling water state determination means includes
Using the corrected water quality value to determine the type of cooling water as the state of the cooling water;
A cooling water state judging device. In any one of the cooling water state determination apparatuses according to claims 8 to 10,
Cooling water state display means for displaying the determined state of the cooling water;
A cooling water state judging device. In any one of the cooling water state determination apparatuses according to claims 8 to 11,
The water quality detection means includes
Detecting the conductivity of the cooling water;
A cooling water state judging device characterized by the above. In the cooling water state determination device according to claim 12,
The water quality detection means includes
Detecting an ionic current flowing between two electrodes in the cooling water, and reversing the polarity of the electrodes every predetermined time,
A cooling water state judging device characterized by the above. In any one of the cooling water state determination apparatuses according to claims 8 to 13,
The water quality detection means and the cooling water temperature detection means are arranged close to each other;
A cooling water state judging device characterized by the above. In any one of the cooling water state determination apparatuses according to claims 8 to 14,
The liquid is beer;
A cooling water state judging device characterized by the above. A liquid supply apparatus that cools and supplies a predetermined liquid introduced from the outside,
A water tank for storing cooling water,
A liquid supply line through which a predetermined liquid passes, the liquid supply line located inside the water tank;
An external supply means for supplying the liquid that has passed through the liquid supply pipe line to the outside;
Water quality detection means located in the water tank, wherein the water quality detection means detects the quality of the cooling water;
Cooling water temperature detecting means for detecting the temperature of the cooling water;
Correction means for correcting the value indicating the water quality of the cooling water using the temperature of the cooling water;
Cooling water state determination means for determining the state of the cooling water using the corrected water quality value;
A cooling means for cooling the cooling water based on the corrected cooling water quality;
A liquid supply apparatus comprising:
The water quality detection means includes
Detecting the conductivity of the cooling water, detecting an ionic current flowing between two electrodes in the cooling water, and reversing the polarity of the electrodes every predetermined time;
A liquid supply device. A cooling water state determination device that cools a predetermined liquid introduced from outside using cooling water and determines a state of the cooling water of a liquid supply device to be supplied,
Water quality detection means located in a water tank for storing the cooling water of the liquid supply device, wherein the water quality detection means detects the quality of the cooling water;
Cooling water temperature detecting means for detecting the temperature of the cooling water;
Correction means for correcting the value indicating the water quality of the cooling water using the temperature of the cooling water;
Cooling water state determination means for determining the state of the cooling water using the corrected cooling water value;
A cooling water state determination device having
The water quality detection means includes
Detecting the conductivity of the cooling water, detecting an ionic current flowing between two electrodes in the cooling water, and reversing the polarity of the electrodes every predetermined time;
A cooling water state judging device characterized by the above.

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