JPH01184093A - Heat pump type thermal sterilizer and thermal sterilizing method - Google Patents

Abstract

PURPOSE:To reduce the installation cost of a sterilizer and to make the occupied space small by utilizing a heat pump and simultaneously performing heating and cooling with one device. CONSTITUTION:After breeding water in a breeding water tank 10 is taken out to a pipe 16a via an automatic scavenger 14, it is sent to a water quality purifier 6 and unnecessary material such as residual bait is removed herein. Then its flow rate is regulated by a valve, etc., and breeding water is sent to the evaporator 2 and the condenser 3 of a heat pump 1 and the breeding water sent to the evaporator 2 is cooled. Furthermore the breeding water sent to the condenser 3 is heated and sterilized and furthermore the breeding water sent from the condenser 3 is sent to a sterilization tank 8, heated and sterilized in accordance with necessity. This sterilized breeding water is sent out from the tank 8 with a pump 17 and passed through a check valve 18 and joined to water fed from the evaporator 2 and sent to a water temp. controller 7 and herein controlled at the temp. suitable for breeding and returned to the original breeding water tank 10.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a heat sterilizer and a sterilization method used to sterilize seawater for aquaculture in a circulating filtration type high-density fish culture system.

(Prior technology) In marine aquaculture, which is the main form of fish aquaculture production today, the sea surface is divided into appropriate sizes using fishing nets, etc., and the fish are raised within them. Water pollution in the surrounding sea areas is occurring due to the outflow of water, and there is a strong need to take action to deal with this problem.

In view of this situation, a cultivation method that does not have to worry about water pollution and has higher productivity than existing aquaculture production is a circulation method in which aquaculture liquids such as seawater are filtered and reused using breeding tanks. The development of a filtration-based high-density fish culture system is desired.

(Problem to be solved by the invention) The circulation filtration type high-density fish farming system as described above is
Profitability is improved by raising fish at a high density, but since it is a circulating system, it is necessary to completely prevent the occurrence of fish diseases caused by pathogenic bacteria.

As a method of sterilizing pathogenic bacteria, it is possible to use drugs, but drugs such as antibiotics cannot be used on the premise of producing clean fever. On the other hand, heat sterilization can be considered as a safe sterilization method, but in order to return it to the aquarium, it is necessary to quickly cool it to a temperature suitable for aquaculture. A separate cooling device is required, which poses problems in terms of cost and equipment space.

[Means to solve the problem]

The present invention is intended to solve the above problems, and utilizes a heat pump that can perform heating and cooling simultaneously.

The heat pump type thermal sterilizer of the present invention includes a heat pump, a supply means for supplying a part of the liquid to be sterilized to the condenser of the heat pump and the remaining part to the evaporator of the heat pump, and a supply means for supplying the liquid that has passed through the condenser. It is characterized by comprising a sterilization tank for further heat treatment if necessary, and a liquid temperature adjustment device for mixing appropriate amounts of the liquid after passing through the condenser and evaporator to adjust the liquid temperature.

In addition, the method of sterilizing water for rearing fish, etc. of the present invention utilizes the heat pump type thermal sterilizer described above, and the rearing water discharged from the rearing tank is passed through a water purification device to remove unnecessary substances such as leftover food. A part of the rearing water is supplied to the condenser of the heat pump and heat-treated, the remainder is supplied to the evaporator of the heat pump, and the rearing water from the condenser is further heat-treated in a sterilization tank if necessary. The method is characterized in that heat-treated breeding water and breeding water that have passed through a condenser are mixed in appropriate amounts, respectively, to adjust the water temperature to a predetermined temperature, and then returned to the breeding tank.

In the present invention, it is not necessary to use only one heat pump, and the size of the breeding tank, the amount of liquid to be sterilized, etc.
Moreover, it goes without saying that an arbitrary number of heat pumps may be provided depending on the capacity of the heat pump.

The amount of liquid to be sterilized supplied to the condenser (heating side) and evaporator (cooling side) of the heat pump does not need to be equal. It is better to reduce it. More specifically, the ratio of 1 condenser to evaporator is preferably about 1:9 to 5:5, preferably about 1:4.

The liquid heated and sterilized through the condenser can be mixed with the liquid from the evaporator and returned to the breeding tank, etc., but if it is better to heat it for a long time or if the heating temperature is insufficient, a separate It is preferable to send it to a sterilization tank where it is further heated or held for a predetermined period of time.

As a heating means in the sterilization tank, a usual method such as heating with an electric heater or heating with steam blowing is used.

It is not necessary to return all of the processed liquid that has passed through the condenser and evaporator of the heat pump to the original breeding tank, etc., and a portion of the heated liquid or cooled liquid may be disposed of outside the circulation system. However, a cooled liquid such as breeding water may be stored separately and released when the temperature of the breeding tank becomes high.

〔Example〕

The present invention will be explained below using an example, but the present invention is not limited thereto.

The figure shows an example in which the present invention is applied to a fish tank.

In the figure, 1O is a breeding tank, and in this tank 10, for example, fish etc. are kept as shown in the figure, and the breeding water is monitored by an automatic water quality monitoring/conditioning system Nll to prevent the water quality from falling below a certain level. At this time, the air supply device 12 and water purification device 6 are operated.

The breeding water is constantly circulated by a 4a ring pump or only when necessary, and is circulated by pipes 16a and 16b.

1 is a heat pump provided in the circulation path, 2 is an evaporator, 3 is a condenser, 4 is a compressor, and 5 is an expansion valve.

Since the rearing water in the rearing tank IO contains leftover food and pickled matter from the fish, it is taken out to the pipe 16a via an automatic vacuum cleaner 14 or the like, and then sent to the water purification device 6 to remove unnecessary substances. Next, the flow rate is adjusted using valves, etc., and the water is sent to the evaporator 2 and condenser 3 of the heat pump, where the water sent to the former is cooled, and the rearing water sent to the latter is heated and sterilized. . Reference numeral 8 denotes a sterilization tank, which may be provided if necessary, and an auxiliary heater 9 can further heat sterilize pathogenic bacteria that require particularly high temperatures.

The sterilized breeding water is sent out from the sterilization tank 8 by the pump 17, passes through the check valve 18, joins the water from the evaporator 2, and is sent to the water temperature control device 7, where it is adjusted to a temperature suitable for breeding. and returned to the original aquarium lO.

In FIG. 1, 13 indicates an automatic feeding machine, 15 indicates an artificial lighting device such as a light bulb, and the top surface of the aquarium 10 is provided with a cover such as a plastic film.

〔Effect of the invention〕

Since the present invention utilizes the principle of a heat pump, -
9 can perform heating and cooling at the same time, and as a result, the equipment cost is low, and it has the advantage that it does not require a large area of equipment space.

In the present invention, the amount of water sent to the condenser (heating side) of the heat pump can be easily adjusted by adjusting the amount of water sent to the condenser (heating side) using a solenoid valve. It can be applied to various fields, such as for the purpose of preventing algae growth.

[Brief explanation of the drawing]

The figure is a schematic % formula for explaining one embodiment of the present invention. (2 others) 11*Puu IA Superintendent O

Claims (2)

[Claims] (1) A heat pump, a supply means for supplying a portion of the liquid to be sterilized to the condenser of the heat pump and the remainder to the evaporator of the heat pump, and further heat treatment of the liquid that has passed through the condenser as necessary. 1. A heat pump type thermal sterilizer comprising: a sterilization tank for sterilizing the liquid; and a liquid temperature adjustment device for adjusting the temperature of the liquid by mixing appropriate amounts of the liquid after passing through the condenser and evaporator. (2) After passing the breeding water discharged from the breeding tank through a water purification device to remove unnecessary substances such as leftover food, a portion of the breeding water is supplied to the heat pump condenser for heat treatment, and the remaining water is passed through the heat pump's condenser. The rearing water supplied to the evaporator and from the condenser is further heat-treated in a sterilization tank as necessary, and then the heated rearing water and the rearing water that have passed through the condenser are mixed in appropriate amounts to reach a predetermined water temperature. A method for sterilizing water for rearing fish, etc., which comprises adjusting and returning water to the rearing tank.