JPH03201938A - Vegetable storage chamber having two temperature zones - Google Patents

Abstract

PURPOSE:To obtain the subject trouble-free storage chamber free from a refrigerant valve for the control of refrigerant and having high accuracy by closely winding the evaporation pipe of a low-temperature storage chamber, coarsely winding the evaporation pipe of a high-temperature storage chamber and controlling the temperature with an electric heater. CONSTITUTION:The objective storage chamber has the following construction. A compressor, a condenser and an expansion valve are placed in a refrigerant channel. The pipe of the evaporator of a low-temperature storage chamber is wound in close state and the pipe of the evaporator of a high-temperature storage chamber is wound in coarse state. The high-temperature storage chamber is provided with an electric heater for the control of temperature.

Description

Detailed Description of the Invention [Industrial Application Field] The present invention relates to a vegetable storage having two temperature zones for preserving vegetables (the concept of vegetables in the present invention includes fruits). be.

[Conventional technology 1 BACKGROUND ART Freezer-refrigerators having two temperature chambers have been known.

FIGS. 5 and 6 show an example of a refrigerator-freezer having two temperature chambers. In the case shown in FIGS. 5 and 6, a single evaporator 25 is connected to a refrigerant flow path 1 in which a single compressor 2 and a single condenser 3 are arranged, and a fan 2
6 to cool the inside of the first chamber (freezer chamber) 27, and further cool the second chamber (refrigerating chamber) 31 by opening and closing a damper 30 operated by a solenoid 28.

Here, the first chamber 27 sends a temperature detection signal from the PIIJ1 room temperature sensor 321 inside the chamber 27 to the controller 33, and operates the combination reflex 2 under the control of the meter controller 33 to circulate the refrigerant. The temperature inside one room 27 was kept at a predetermined temperature. The second chamber 31 receives a temperature detection signal in the second chamber 31 from the second chamber temperature sensor 34 and sends it to the controller 3.
5, operate the tension/id 28 and damper 30.
was opened and closed to maintain the temperature inside the second chamber 31 at a predetermined temperature.

FIG. 7 shows another conventional example. In this conventional example, the first chamber 27 receives a temperature detection signal in the first chamber 27 from the @1 room temperature sensor 32 and sends it to the first controller. Send to 36,
The first refrigerant valve 3 is controlled by the control signal from the fj41 controller 36.
7, and further sends a control signal from the first controller 36 to the third controller 38 to control the compressor 2 and open/close the first chamber 27.
The supply of refrigerant to the first evaporator 39 was controlled. In addition, the second chamber 31 is controlled by a temperature sensor 34 for the second chamber.
A detection signal for the interior of the second chamber 31 is sent to the second controller 40, and the second refrigerant valve 41 is opened and closed by the control signal of the second controller 40. Vessel 3
8 to control compressor 2 and fjIJ2 room 31
The supply of refrigerant to the 31st generator 42 was controlled.

[Problem to be Solved by the Invention 1] However, in the conventional example shown in FIGS. 5 and 6, space is required to arrange the gunper 30, air passage 43, fan 26, etc., and the storage capacity is reduced. Oh, and damper 3
Since it comes with items that are prone to break down due to freezing such as 0,
The reliability is low, and the temperature of the Pt42 chamber 31 is unstable because it is controlled only by opening and closing the gunper 30. Moreover, when the temperature of the t51 chamber 27 is below a predetermined temperature, the temperature of the second chamber 31 rises and the gunper Even if 30 is opened, compressor 2
There was a problem in that the cold water was not being sent because it was not moving, causing the temperature to rise abnormally.

Further, in the conventional example shown in FIG. 7, an expensive first refrigerant valve 37 and a second refrigerant valve 41 for refrigerant control are required, resulting in high cost. There was a problem that the compressor 2 had to be turned on and off at different timings based on the opening and closing timings of the first refrigerant valve 37 and the @2 refrigerant valve 41, making the third controller 38 complicated.

Moreover, each of the above-mentioned conventional examples is a refrigerator-freezer, and vegetables cannot be stored in the freezer compartment, which is the mi compartment 27. I try to store vegetables. However, the refrigerating compartment of a general refrigerator is normally maintained at a temperature of about 3°C, and if the vegetable storage section 31a is installed at the bottom of the second compartment 31, which is the refrigerating compartment, this vegetable storage section 31a to 5
The temperature was maintained at ~7°C. However, in order to preserve the freshness of ordinary vegetables that do not suffer from low-temperature damage, it is better to keep them at low temperatures to suppress respiration, and for southern vegetables that do suffer from low-temperature damage, such as eggplants and cucumbers, temperatures are relatively high. However, conventionally, all vegetables are
Because they are stored at 7°C, ordinary vegetables have little effect on respiration and cannot maintain their freshness over a long period of time.In addition, vegetables that are susceptible to low-temperature damage are said to suffer from low-temperature damage due to the temperature being too low. There was a problem.

The present invention was invented in view of the above problems, and
The purpose is to eliminate the need for conventional expensive refrigerant control valves, eliminate the need for electromagnetic pumps, air channels, fans, etc., and eliminate the need for extra space and prevent breakdowns. In addition, ordinary vegetables can be stored at a low temperature that does not freeze, suppressing respiration and maintaining freshness for a long period of time, and vegetables that can cause low-temperature damage can be stored at a relatively high temperature. To provide a vegetable storage cabinet having two temperature zones, which can prevent low-temperature damage and also control the temperature of a high-temperature storage chamber to an arbitrary temperature.

[Means for Solving the Problems] The vegetable storage having two temperature zones according to the present invention includes a compressor 2, a condenser 3, and an expansion valve 4 disposed in a refrigerant flow path 1, and the refrigerant flow path 1 cools to a low temperature. The evaporator 6 of the low-temperature storage chamber 5 for storing vegetables is connected to the evaporator 8 of the high-temperature storage chamber 7 for storing vegetables cooled to a temperature higher than the above-mentioned low temperature to form the evaporator 6 of the low-temperature storage chamber 5. The evaporation flow path 6a constituting the evaporator 8 of the high temperature storage chamber 7 is wound tightly, and the evaporation flow path 8a constituting the evaporator 8 of the high temperature storage chamber 7 is wound loosely.
By adopting this configuration, the problems of the conventional example described above are solved.

[Operation] Therefore, by operating the single compressor 2, the refrigerant flow path 1
The low temperature storage chamber 5 is cooled by the evaporation passage 6a of the evaporator 6 wound around the low temperature storage chamber 5 by flowing refrigerant into the low temperature storage chamber 5, and the evaporation passage 8a of the evaporator 8 of the high temperature storage chamber 7 cools the high temperature storage chamber. 7, but in this case, the low temperature storage chamber 5
The evaporation channel 6a that constitutes the evaporator 6 in the high temperature storage chamber 7 is tightly wound, and the evaporation channel 8a that constitutes the evaporator 8 in the high temperature storage chamber 7 is loosely wound. It is now possible to set the temperature to a predetermined low temperature that can suppress breathing intake, and to set the temperature of the high temperature storage chamber 7 to a relatively high temperature suitable for storing hot vegetables. Here, by providing the temperature control electric heater 12 in the high temperature storage chamber 7, the temperature in the high temperature storage chamber 7 can be controlled to a predetermined temperature by controlling the temperature control IC% heater 12.

[Example 1] The present invention will be described in detail below based on an example shown in the accompanying drawings.

FIGS. 1 and 2 show a control block diagram and a schematic perspective view of an embodiment of the present invention. First, explanation will be given based on the control block diagram shown in FIG.

As shown in Fig. 1, a single compressor 2 and a single condenser 3 are arranged in a refrigerant flow path 1 through which refrigerant flows, and a low-temperature storage where vegetables are cooled to a low temperature and stored. The evaporator 6 of the chamber 5 and the evaporator 8 of the high-temperature storage chamber 7, which cools the vegetables to a temperature higher than the above-mentioned low temperature and stores them, are connected in parallel,
Expansion valves 4 are arranged in front of the evaporator 6 in the low temperature storage chamber 5 and in front of the evaporator 8 in the high temperature storage chamber 7 in the refrigerant flow path 1, respectively. Here, the evaporation channel 6a constituting the evaporator 6 of the low-temperature storage chamber 5 is tightly wrapped around a heat equalizing plate (not shown) provided on the outer periphery of the low-temperature storage chamber 5, and the high-temperature storage chamber 7
The evaporation channel 8a constituting the evaporator 8 is wound around a heat equalizing plate (not shown) more loosely than the evaporation channel 6a. The low temperature storage chamber 5 is provided with a low temperature temperature sensor 9, and the signal from the low temperature temperature sensor 9 is sent to a temperature sensor amplifier 10, and the signal from the temperature sensor amplifier 10 is sent to a humidity controller 11. The temperature inside the low temperature storage chamber 5 is thereby controlled to 1'C. An electric heater 12 for temperature control is further wound around a heat equalizing plate on the outer periphery of the high temperature storage chamber 7. In FIG. 1, a high-temperature sensor 13 is provided in the high-temperature storage chamber 7. The signal from the high-temperature sensor 13 is sent to a temperature sensor amplifier 14, and the signal from the temperature sensor amplifier 14 is used to control the heater. The temperature control electric heater 12 is controlled by sending the temperature to the heater 15. In the tIIJ1 diagram, 16 is a volume for temperature setting. The evaporation channel 8a constituting the evaporator 8 of the high temperature storage chamber 7 is wound more loosely than the evaporation channel 6a constituting the evaporator 6 of the low temperature storage chamber 5, so that the temperature is approximately 8°C.
@As for later, the temperature of the high-temperature storage room M should be set to 10-15°C.
, the temperature control electric heater 12 is used to heat the electric heater 1.
2 to a predetermined temperature (set temperature within 10 to 15°C). The set temperature within the range of 10 to 15° C. can be set to any desired temperature by operating the temperature setting volume 16.

FIG. 2 shows a schematic perspective view of a vegetable storage with two temperature zones using the control shown in FIG. An upwardly opening container body constituting the low temperature storage chamber 5 and an upwardly opening container body constituting the high temperature storage chamber 7 are installed inside, and the upwardly opening container body constituting the low temperature storage chamber 5 and the high temperature storage chamber 7
A heat insulating material 19 is filled around the outer periphery of the container body with an upward opening. Also, on the side of the container 18, a compressor 2,
A capacitor 3 and a control box 20 are provided. In the figure, 21 is a power switch. A 7-lunge 22 is provided on the outer periphery of the opening 17 of the container 18, and the vegetable storage with the above configuration is placed under the floor, and the 7-lunge 22 is attached to the opening provided in the floor. . Low temperature storage room 5
A lid is removably attached to each of the upper opening of the container body constituting the high temperature storage chamber 7 and the upper opening of the container body constituting the high temperature storage chamber 7. A lid is also attached to 17 so that it can be opened and closed.

Then, a vegetable storage T having two temperature zones configured as described above is used.
The F storage is for storing general vegetables in the low temperature storage chamber 5, and since the low temperature storage chamber 5 is cooled to 0 to 2°C (preferably 1°C), the vegetables can be kept at the lowest temperature without freezing. temperature to suppress the respiration of vegetables as much as possible to maintain their freshness. On the other hand, vegetables and fruits that are prone to low temperature damage, such as eggplants and cucumbers, are to be stored in the high temperature storage room 7, and the high temperature storage room 7 is ideal for storing vegetables in the range of 10 to 15°C. By setting the temperature to , it is possible to store while preventing low temperature damage.

FIG. 3 and FIG. 54 show a control block diagram and a schematic perspective view of another embodiment of the present invention. In this embodiment, the refrigerant flow path 1 includes an evaporator 6 of a low-temperature storage chamber 5 for storing vegetables after cooling them to a low temperature, and an evaporator 8 of a high-temperature storage chamber 7 for storing vegetables after cooling them to a temperature higher than the above-mentioned low temperature. connect in series,
A single expansion valve 4 is disposed in front of the evaporator 6 in the low-temperature storage chamber 5 of the refrigerant flow path 1. In this embodiment, only one expansion valve 4 is required, and troublesome design such as balancing the refrigerant distribution between the low-temperature storage temperature chamber 5 side and the high-temperature storage temperature chamber 7I+ is unnecessary. The temperature of the high temperature storage chamber 7 does not turn the compressor 2 on or off, but when the high temperature storage temperature chamber 7 reaches a predetermined temperature or higher, the amount of evaporation of the refrigerant increases, the pressure rises, and the amount of refrigerant fed to the compressor 2 decreases. This increases the amount of liquid refrigerant in the low-temperature chamber that passes through (free pass), and the high-temperature storage chamber 7 is well cooled on the high-temperature storage chamber 7 side and has a self-adjusting effect.
If the side is too low, it will be self-adjusted based on the opposite principle.

[Effects of the Invention] As described above, the present invention provides an evaporator for a low-temperature storage chamber in which a compressor, a condenser, and an expansion valve are arranged in a refrigerant flow path, and vegetables are cooled to a low temperature and stored in this refrigerant flow path. and an evaporator in a high-temperature storage room that cools vegetables to a temperature higher than the above-mentioned low temperature and stores them, and tightly wraps the evaporation flow path that constitutes the evaporator in the low-temperature storage room to connect the evaporator in the high-temperature storage room. The evaporation flow path is roughly wound, and the high-temperature storage chamber is equipped with a type A heater for temperature control, so there are no expensive refrigerant valves, electromagnetic valves, air channels, fans, etc. to control the refrigerant. With a simple configuration without the need for any heat storage, the low-temperature storage chamber can be set to a predetermined low temperature that suppresses the respiration of ordinary vegetables, and the temperature of the high-temperature storage chamber can be adjusted to a temperature suitable for storing high-temperature vegetables. As a result, ordinary vegetables can be stored at a low temperature that does not freeze, inhibiting respiration, and maintaining freshness for a long period of time. It is possible to provide a vegetable storage with two temperature zones that can prevent low-temperature damage by storing vegetables at relatively high temperatures and low temperatures. In particular, in the present invention, since the T1'A heater for temperature control is provided in the high temperature storage chamber in which the evaporation channel is roughly wound, the approximate temperature can be set by roughly winding the evaporation channel. The temperature in the high-temperature storage chamber is heated by a temperature control type A heater and electrically controlled to an arbitrary set temperature within a certain temperature range. This allows you to set the optimum temperature for each vegetable or fruit.

[Brief explanation of drawings]

FIG. 1 is a control block diagram of an embodiment of the present invention, FIG. FIG. 5 is a schematic sectional view showing a conventional example, PIS 6 is a system diagram of the same as above, and FIG. 7 is a schematic sectional view of another conventional example, where 1 is a refrigerant flow path, 2 is a compressor, 3 is a condenser, 4 is an expansion valve, 5
1 is a low-temperature storage chamber, 6 is an evaporator, 6a is an evaporation channel, 7 is a high-temperature storage chamber, 8 is an evaporator, 8a is an evaporation channel, and 12 is a temperature-controlled streetcar heater.

Claims (1)

[Claims] (1) A compressor, a condenser, and an expansion valve are placed in the refrigerant flow path, and in this refrigerant flow path there is an evaporator in a low-temperature storage chamber that cools the vegetables to a low temperature and stores them, and a cooled to a temperature higher than the above low temperature to store the vegetables. The evaporator in the high-temperature storage chamber is connected to the evaporator in the high-temperature storage chamber, the evaporation channel constituting the evaporator in the low-temperature storage chamber is tightly wound, and the evaporation channel constituting the evaporator in the high-temperature storage chamber is loosely wound. A vegetable storage with two temperature zones, characterized in that a storage chamber is provided with an electric heater for temperature control.