JP2008185286A - Thermostat bath - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a thermostat bath capable of controlling a temperature with high accuracy at either a higher temperature or lower temperature with respect to room temperature. <P>SOLUTION: A flow channel of the air flow channel 22 is constituted so that the heated air is circulated by an air distribution fan 33 to flow from a lower portion to both side portions, from the both side portions to an upper portion, from the upper portion to a back portion, and from the back portion to the lower portion in the air flow channel 22, when the inside of a thermostat chamber 16 is kept at a temperature higher than room temperature, and the cooled air is circulated by the air distribution fan 33 reversely rotated, to flow from the lower portion to the back portion, from the back portion to the upper portion, from the upper portion to the both side portions and from the both side portions to the lower portion in the air flow channel 22, when the inside of the thermostat chamber 16 is kept at a temperature lower than the room temperature. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a thermostatic chamber that can perform temperature control with high accuracy at both a temperature higher than room temperature and a temperature lower than room temperature.

A double wall structure consisting of an exterior wall and an interior wall is formed, a space surrounded by the interior wall is formed in a temperature-controlled room, and a blower fan and an evaporator of a refrigerator are disposed between the exterior wall and the interior wall. A fresh food storage device in which an air flow path is formed between an exterior wall and an interior wall is known (Japanese Patent Publication No. 7-49905). According to this apparatus, since the temperature-controlled air flows in the air flow path (air jacket) and the air is not directly blown onto the stored item, there is an advantage that the influence of the cooling air is small.
Japanese Patent Publication No. 7-49905

However, the above-described apparatus has a problem that precise temperature control is difficult because temperature-controlled air flows in the air jacket in a certain direction and temperature is controlled regardless of the control temperature.
Accordingly, the present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a thermostatic chamber that can perform temperature control with high accuracy at both a temperature higher than room temperature and a temperature lower than room temperature.

  The thermostatic bath according to the present invention has a double wall structure composed of an exterior wall and an interior wall, a space surrounded by the interior wall is formed in a thermostatic chamber, and a blower fan is provided between the exterior wall and the interior wall. In a thermostatic bath in which an evaporator and a heater of a refrigerator are disposed, and an air flow path is formed between the exterior wall and the interior wall, the evaporator and the heater are disposed on the lower side of the air flow path. And a forward / reverse motor for forward / reversely driving the blower fan, and when maintaining the constant temperature room at a temperature higher than room temperature, the air heated by the blower fan is When flowing from the lower part to both sides, from both sides to the upper part, from the upper part to the back part, and from the back part to the lower part, when the inside of the temperature-controlled room is maintained at a temperature lower than room temperature, the blower fan is reversely rotated to rotate As a result, the cooled air is The back from the top from the back, on both sides from the top, so that the flow from both sides by the circulation to the lower, characterized in that the flow path of the air flow path is formed.

  The constant temperature bath according to the present invention has a double wall structure composed of an exterior wall and an interior wall, a space surrounded by the interior wall is formed in a temperature-controlled room, and a blower fan is provided between the exterior wall and the interior wall. And an evaporator of a refrigerator and a heater are disposed, and in the thermostatic bath formed between the exterior wall and the interior wall in the air flow path, the air flow path is a double wall space on the lower surface, A lower surface air channel extending in the front-rear direction, a double wall space on both side surfaces, a side surface air channel communicating with the lower surface air channel, and a double wall space on the upper surface, The upper surface air flow path that extends in the direction and communicates with the side surface air flow path, and a double wall space on the back surface, with partitioning members arranged on the left and right sides and extending in the vertical direction, Formed in a back surface air flow path communicating with the flow path and the bottom surface air flow path, and the evaporator and the heater A forward / reverse motor that is disposed in the lower surface air flow path and drives the blower fan is disposed, and when the inside of the temperature-controlled room is maintained at a temperature higher than room temperature, When the air is flowed in the order of the lower surface air flow path, the side surface air flow path, the upper surface air flow path, and the back surface air flow path, The air that is reversely rotated and cooled by the blower fan is flowed in the order of the lower surface air channel, the back surface air channel, the upper surface air channel, and the side surface air channel.

Further, the blower fan, the evaporator, and the heater are arranged in this order from the rear side to the front side in the lower surface air flow path.
The side surface air flow path communicates with the front end portion side of the lower surface air flow path.

  According to the present invention, when the temperature in the temperature-controlled room is set to a temperature higher than room temperature, the air heated by the heater rises from the lower part of the air flow path along both sides. In other words, a heat pool is generated at the lower part of the air flow path, and it rises along both sides and then descends from the back side, so that natural heat convection occurs, thereby enabling accurate heating. In addition, when the temperature in the temperature-controlled room is set to a temperature lower than room temperature, the blower fan is reversely rotated, and the air cooled by the refrigerator is sent to the upper part from the back side of the air flow path by the blower fan, so to speak. Cold air accumulation occurs in the upper part of the air flow path, and natural heat convection is generated in which the heavy air descends on both sides, so that accurate cooling can be performed.

Preferred embodiments of the present invention will be described below in detail with reference to the accompanying drawings.
1 is a front view of the thermostatic chamber 10, FIG. 2 is a left side view, FIG. 3 is a right side view, and FIG. 4 is a plan view.
The thermostatic chamber 10 has a double wall structure including an exterior wall 12 and an interior wall 14, and a space surrounded by the interior wall 14 is formed in the temperature-controlled room 16. The front surface is formed on a door 18 that can be opened and closed.

  As shown in FIG. 5, the exterior wall 12 has a simple structure in which a heat insulating material 21 made of a polyurethane molding resin plate is attached to the inner surface of the stainless steel plate 20 with an adhesive or the like. The interior wall 14 is made of a stainless steel plate. Since the exterior wall 12 and the interior wall 14 have such a simple structure, assembly is easy. A space between the inner surface of the heat insulating material 21 and the outer surface of the interior wall 14 is formed in the air flow path 22.

  The air flow path 22 is a double wall space on the lower surface portion, which is a lower surface air flow channel 24 extending in the front-rear direction, and a double wall space on both side surfaces, and a side surface communicating with the lower surface air flow path 24. A double wall space on the upper surface portion, an upper surface air flow channel extending in the front-rear direction and communicating with the side surface air flow channel 25, and a double wall space on the rear surface portion. Insulating material (partition material) 27 is disposed on both the left and right sides (FIG. 4), and has a rear air channel 28 that extends in the vertical direction and communicates with the upper air channel 26 and the lower air channel 24. .

The lower surface air flow path 24 is formed by arranging a U-shaped cover 30 that opens downward in the double wall space of the lower surface. And in this lower surface part air flow path 24, the ventilation fan 31, the evaporator 32 of the refrigerator, and the heater 33 are arrange | positioned in this order toward the front part side from the rear side. In addition, 35 is a refrigerator main body.
Although not shown, a forward / reverse motor for rotating the blower fan 33 in the forward and reverse directions is provided. The forward / reverse motor, the refrigerator 35, and the heater 33 are driven and controlled by a control unit (not shown).

The side air channel 25 communicates with the front end side of the lower surface air channel 24 through an opening 36 opened on the side surface on the front end side of the cover 30. By doing in this way, since air flows into the rear side surface air flow path 25 reliably passing the evaporator 32 and the heater 33, it is suitable.
As clearly shown in FIGS. 2 and 3, the two side surface air passages 25 are fixed to the inner surface of the heat insulating material (partition material) 21 by an adhesive so as to extend vertically. The heat insulating material (partition material) 37 is divided so as to be divided into three flow paths. These three channels communicate with the upper surface air channel 26 at the upper end. These heat insulating materials (partition materials) 37 have an air rectifying effect.

Further, the upper surface air flow path 26 is partitioned by four heat insulating materials (partition materials) 38 fixed by an adhesive at a predetermined interval so as to extend in the front-rear direction to the heat insulating material (partition material) 21. Thus, it is set to be divided into three flow paths. These three flow paths are connected to the rear air flow path 28 at the rear end.
In addition, the back part air flow path 28 is formed in one flow path by arranging the wide heat insulating material (partition material) 27 on the left and right of the double wall structure. The lower end communicates with the rear end portion of the cover 30 constituting the lower surface air flow path 24.
Although the heat insulating material 27, the heat insulating material 37, and the heat insulating material 38 can also use the board | plate material which consists of a polyurethane resin suitably, a material is not specifically limited.

  The control unit has a set temperature input unit so that the set temperature of the thermostat 10 can be input. Although not shown, a temperature sensor for detecting the internal temperature of the temperature-controlled room 16 is provided, and temperature data detected by the temperature sensor is input to the control unit.

The constant temperature bath 10 in the present embodiment has the above configuration.
The operation of the thermostatic chamber 10 is performed as follows.
When the inside of the temperature-controlled room 16 is heated and maintained at a temperature higher than room temperature, for example, 37 ° C., 37 ° C. is input to the set temperature input unit of the control unit. The control unit drives and controls the drive units of the refrigerator 35, the heater 33, and the blower fan 33. The air in the lower surface air flow path 24 is first cooled to a required temperature by the refrigerator 35 and then heated by the heater 33. The heated air is caused to flow in the order of the lower surface air flow path 24, the side surface air flow path 25, the upper surface air flow path 26, and the back surface air flow path 28 by the blower fan 31. Since the heated air is light and easily rises, the inside of the temperature-controlled room 16 is uniformly heated by rising from the lower surface air flow path 24 through the wide side air flow path 25 without trouble.

  The reason why the refrigerator 35 is also operated is that when the temperature is once cooled to a certain temperature and heated by the heater 33, the temperature can be adjusted accurately. The temperature in the temperature-controlled room 16 is detected by a temperature sensor, and this detected temperature is input to the control unit. The control unit controls on / off of the heater 33 based on the detected temperature of the temperature sensor, and The temperature is controlled so as to become the set temperature.

  On the other hand, when maintaining the temperature lower than room temperature such as 20 ° C., the heater 33 is turned off and the refrigerator 35 is turned on. Then, by rotating the blower fan 31 in the reverse direction, the cooled air flows in the order of the lower surface air channel 24, the back surface air channel 28, the upper surface air channel 26, and the side surface air channel 25. To do. The low-temperature air becomes heavier and difficult to rise, but the inside of the back surface air flow path 28 having a small cross-sectional area is raised to the top surface air flow path 26 all at once. As a result, heavy and cold air descends in the air flow passages 25 on both side surfaces, and cools the temperature-controlled room 16 uniformly.

  In the above embodiment, the blower fan 31, the evaporator 32, and the heater 33 are disposed in the lower surface air flow path 24, but these are not necessarily disposed in the lower surface air flow path 24. For example, it may be provided at the lower part in the side air channel 26.

It is front sectional drawing of a thermostat. It is left side sectional drawing of a thermostat. It is right side sectional drawing of a thermostat. It is a plane sectional view of a thermostat. It is sectional explanatory drawing of an exterior wall.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Constant temperature bath 12 Exterior wall 14 Interior wall 16 Constant temperature chamber 18 Lid 20 Stainless steel plate 21 Heat insulating material 22 Air flow path 24 Lower surface part air flow path 25 Side surface air flow path 26 Upper surface part air flow path 27 Heat insulating material 28 Back surface air flow Road 30 Cover 31 Blower fan 32 Evaporator 33 Heater 35 Refrigerator 36 Opening part 37 Heat insulation material 38 Heat insulation material

Claims (4)

A double wall structure consisting of an exterior wall and an interior wall is formed, and a space surrounded by the interior wall is formed in a temperature-controlled room. Between the exterior wall and the interior wall, a blower fan, an evaporator and a heater are installed. In the thermostatic bath that is disposed and formed between the exterior wall and the interior wall in the air flow path,
The evaporator and the heater are disposed on the lower side of the air flow path,
Comprising a forward / reverse motor for normally / reversely driving the blower fan;
When the inside of the temperature-controlled room is maintained at a temperature higher than room temperature, the air heated by the blower fan is from the lower part of the air flow path to both sides, from both sides to the upper part, from the upper part to the back part, When circulating from the back to the lower part and maintaining the inside of the temperature-controlled room at a temperature lower than room temperature, the blower fan is reversely rotated and the air cooled by the blower fan is sent from the lower part of the air flow path. A thermostatic chamber characterized in that the air flow path is formed in the back part so as to circulate and flow from the back part to the upper part, from the upper part to both side parts, and from both side parts to the lower part. A double wall structure consisting of an exterior wall and an interior wall is formed, and a space surrounded by the interior wall is formed in a temperature-controlled room. Between the exterior wall and the interior wall, a blower fan, an evaporator and a heater are installed. In the thermostatic bath that is disposed and formed between the exterior wall and the interior wall in the air flow path,
The air flow path is a double wall space on the lower surface part, and is a lower surface air flow path extending in the front-rear direction, and a double wall space on both side surface parts, and a side surface part communicating with the lower surface air flow path An air channel, and a double wall space on the upper surface, which extends in the front-rear direction and communicates with the side surface air channel, and a double wall space on the rear surface. A partition member is disposed on the side and extends in the up-down direction, and is formed in a back surface air flow path communicating with the top surface air flow path and the bottom surface air flow path,
The evaporator and the heater are disposed in the lower surface air flow path;
A forward / reverse motor for driving the blower fan is disposed,
When the inside of the temperature-controlled room is maintained at a temperature higher than room temperature, the air heated by the blower fan is supplied to the lower surface air channel, the side surface air channel, the upper surface air channel, and the back surface air channel. When the inside of the temperature-controlled room is kept at a temperature lower than room temperature, the air blower is reversely rotated and the air cooled by the air blower fan is converted into a lower surface air channel, a back surface air channel, and an upper surface. A constant temperature bath which is made to flow in the order of an air channel and a side air channel.   The constant temperature bath according to claim 2, wherein the blower fan, the evaporator, and the heater are arranged in this order from the rear side to the front side in the lower surface air flow path.   The thermostat according to claim 2 or 3, wherein the side surface air flow path communicates with a front end side of the lower surface air flow path.

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