JPH037806Y2 - - Google Patents

Description

[Detailed description of the invention] (Industrial application field) This invention uses a cooler, heater, and humidifier using a refrigeration cycle in the circuit to control temperature and humidity (a wide range of humidity from low humidity to high humidity). The present invention relates to an environmental test device that houses a test tank and creates air with a desired temperature and humidity in a test chamber.

(Prior art) As shown in FIG. 3, a conventional environmental test device includes a cooling chamber 1 having a cooler, a heating chamber 5 having a heater, a humidifying chamber 6 having a humidifier, and a test tank 9.
In this case, the air passages directly in the cooling chamber 1 and immediately after the test chamber 9 are short-circuited by a bypass passage, and the circuits between the humidifying chamber 5 and the cooling chamber and between the test chamber 9 and the cooling chamber are short-circuited. 1 and is equipped with air volume regulators 2 and 4. Note that 7 and 8 are blowers for circulating air within the test apparatus.

(Problem to be solved by the invention) However, with such conventional environmental test equipment, there was no problem when the air was low humidity;
The following drawbacks were found when trying to control high humidity inside the test chamber.

(a) Most of the moisture humidified by the humidifier would form frost on the fins of the cooler, so it was necessary to dehumidify it frequently. Therefore, stable control of humidity has been difficult.

(b) Because the blower was installed near the cooling chamber, the high humidity air flowing from the test chamber caused by the cooling air flowing through the bypass passage could form frost near the blower.

Therefore, with conventional equipment, it was only possible to maintain a constant temperature and humidity inside the test chamber in a low humidity region.

Therefore, an object of the present invention is to provide a device that can stably control the inside of a test chamber even when the humidity is high.

(Means for solving the problem) That is, the present invention has a cooling chamber 11 having a cooler 12 therein and a heating chamber 1 having a heater 16 inside.
1. In an apparatus in which a humidifying chamber having a humidifier 19 and a test tank 21 are connected to each other through air passages, the air passage 1 between the cooling chamber 11 and the heating chamber 15
7 and the cooling chamber 11 and the flow rate is adjusted by the flow rate regulator 28, and the air passage 23 connecting the cooling chamber 11 and the test chamber 21 is provided at the connection part with the test chamber 21. It has an exhaust port that is opened and closed by a damper 25 and an outside air inlet that is opened and closed by a damper 26 provided at the connection part of the air passage 23 with the cooling chamber 11 that connects the cooling chamber 11 and the test chamber 21. It is an environmental testing device.

(Embodiments) The present invention will be described in detail below with reference to embodiments shown in the drawings.

In FIG. 1, reference numeral 11 denotes a cooling chamber having a cooler 12 therein, and the cooling chamber 11 is provided with an outside air inlet 13 for introducing air into the cooling chamber 1. blower 14
is installed. 15 is a heater 16 inside
The heating chamber 15 is connected to the outlet of the cooling chamber 11 via an air passage 17. Reference numeral 18 denotes a humidifying chamber in which a humidifier 19 for humidifying using an electric heater method is installed, and the humidifying chamber 18 is connected to the heating chamber 15 via an air passage 20.

21 is a test tank, and the test tank 21 is a humidifying chamber 18.
and is connected via an air passage 22.

The outlet 21 a of the test tank 21 is connected to the outside air inlet 13 of the cooling chamber 11 via a return air passage 23 . An air exhaust port 24 is provided near the outlet 21a of the test chamber 21, and the air flow is directed to the air exhaust port 24.
Or the damper 2 switches to the return air passage 23 side.
5 is provided. Further, the vicinity of the outside air introduction port 13 of the return air passage 23 is communicated with the outside air via a damper 26.

27 is a bypass passage that short-circuits the air passage 17 and the air inlet 11a of the cooling chamber 11, and a flow rate regulator 28 is provided at the connection between the bypass passage 27 and the air passage 17 to adjust the air flow rate. It is being Furthermore, a blower 30 is installed at the air inlet 11a of the cooling chamber 11 to forcefully circulate the air.

In the configuration described above, in the device according to the present invention, each blower 14, 3 is turned on by turning on the switch.
0. When the cooler 12, heater 16, and humidifier 19 are operated, the air cooled by the cooler 12 flows into the air passage 17, its flow rate is adjusted by the flow rate regulator 28, and then the air is transferred to the heating chamber 15. Flow into. The air flowing into the heating chamber 15 is heated to a predetermined temperature by the heater 16 and sent to the humidification chamber 18 via the air passage 20. The air sent into the humidification chamber is changed into air with a desired humidity by a humidifier, and then passed through the air passage 22.
It is sent to the test tank 21 via.

A suitable environmental test is then carried out within this test tank 21. If the air flowing out from the test tank 21 is high humidity, a damper 25 returns the air to the air passage 23.
is exhausted directly to the outside to block it. Furthermore, when the air is low in humidity, the damper 25 closes the air exhaust port 24, so that the air flows to the outside air inlet 13 via the return air passage 23, and is returned into the cooling chamber 11 by the blower 14. Further, the air leaving the cooling chamber 11 is partially guided to the bypass passage 27 by the flow rate regulator 28 and returns to the cooling chamber 11 again.

As described above, in the embodiments of the present invention,
In the case of highly humid air, the air leaving the test chamber is not circulated but is exhausted to the outside, so there is no risk of the highly humid air returning to the cooling room and forming frost near the cooler.

Next, the embodiment shown in FIG. 2 will be explained. This embodiment is a type in which the humidification chamber is changed from the environmental test apparatus of the embodiment shown in FIG. The structure of is the same as that of the previous embodiment.

In FIG. 2, reference numeral 31 denotes an ultrasonic type humidifier, and the humidifier 31 includes a humidifier air passage 32 connected to the air passage 20 and which takes in a portion of air, and a humidifier air passage 32 connected to the humidifier air passage 32. Humidifier air outlet 33 having an outlet near the moisture outlet 31a of No. 19
has been established.

To explain the flow of air in the humidification chamber 18,
A portion of the air flowing through the air passage 20 is guided by the humidifier air passage 32 and is blown out from the humidifier air outlet 33 toward the humidifier 18. At this time, the water vapor emitted from the humidifier 31 is combined and blown into the humidification chamber 18.

In this embodiment, since the humidifier employs an ultrasonic type, humidity can be controlled more accurately with a smaller amount of air than a conventional electric heating type.

(Effects of the invention) As described above, the present invention has a structure that prevents frost from forming on the cooler compared to conventional environmental test equipment, so it can be applied to high-humidity environmental tests. I can do it.

[Brief explanation of the drawing]

1 and 2 are longitudinal cross-sectional views of an apparatus showing an embodiment of the present invention, and FIG. 3 is a longitudinal cross-sectional view of a conventional apparatus. 1... Cooling room, 2, 4... Air volume regulator, 5...
Heating chamber, 6... Humidification chamber, 7, 8... Blower, 9
...Test tank, 11...Cooling room, 12...Cooler,
13...Outside air inlet, 14...Blower, 15...
...Heating chamber, 16... Heater, 17, 20, 22,
23... Air passage, 18... Humidification chamber, 19, 31
... Humidifier, 24 ... Air exhaust port, 21 ... Test tank, 25, 26 ... Damper, 27 ... Bypass passage, 28 ... Flow rate regulator, 30 ... Blower.

Claims (1)

[Claims for Utility Model Registration] (1) Cooling chamber 11 having a cooler 12 inside, heating chamber 15 having a heater 16 inside, and humidifier 19
In an apparatus in which a circuit is formed between a humidifying chamber and a test chamber 21 through air passages, the air passage 17 between the cooling chamber 11 and the heating chamber 15 and the cooling chamber 11 are short-circuited, and the flow rate is adjusted by the flow rate regulator 28. bypass passage 27 where the temperature is adjusted, and the cooling chamber 11
and the cooling chamber 11 of the air passage 23 that connects the cooling chamber 11 and the test chamber 21. An environmental test device having an outside air inlet that is opened and closed by a damper 26 provided at the connection part with the outside air inlet. (2) The environmental testing device according to claim 1, wherein the humidifier is of an electric heater type. (3) Claim 1 of the utility model registration, which is characterized in that the humidifier is composed of an ultrasonic type humidifier.
Environmental test equipment as described in section. (4) A humidifier ventilation passage 32 that takes in some air, which is connected to the air passage 20 that connects the heating chamber 15 and the humidifier 18 to the humidification chamber; The environmental testing device according to claim 3, which is a registered utility model, and further comprises a moisture blowing means comprising a humidifier air outlet having an outlet.