JPH03201939A - Vegetable storage chamber having two temperature zones - Google Patents

Abstract

PURPOSE:To dispense with a refrigerant valve and a damper of electromagnetic solenoid for the control of refrigerant and to obtain the subject storage chamber having large space and suitable for the preservation of vegetables by closely winding a refrigerant-evaporation pipe in a low-temperature storage chamber and coarsely winding the pipe in a high-temperature storage chamber. CONSTITUTION:The objective storage chamber is produced by placing a compressor, a condenser and an expansion valve in a refrigerant channel, closely winding the pipe of the evaporator of a low-temperature storage chamber and coarsely winding the pipe of the evaporator of a high-temperature storage chamber.

Description

Detailed Description of the Invention [Field of PIi Business Application] The present invention provides a vegetable storage with two temperatures: η for preserving vegetables (the concept of vegetables in the present invention includes fruits). This invention relates to

[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 this tIIJ5 figure and figure 6, a single compressor 2, a single capacitor 3
A single evaporator 25 is connected to the refrigerant flow path 1 in which a fan 26 is used to blow air to cool the inside of the first chamber (freezer chamber) 27, and further, by opening and closing a gun bar 30 operated by a slide/id 28. The second chamber (refrigeration chamber) 31 was designed to be cooled. Here, the first chamber 27 is connected to the first chamber temperature sensor 32.
A temperature detection signal in the first chamber 27 is sent to the controller 33, and the controller 33 operates the compressor 2 to circulate the refrigerant to maintain the temperature in the first chamber 27 at a predetermined temperature. Then, the second chamber 31 sends a temperature detection signal in the second chamber 31 from the temperature sensor 34 for the j12 chamber to the controller 35, operates the slide/id 28, and controls the temperature of the gunper 3.
0 was opened and closed to maintain the temperature inside the second chamber 31 at a predetermined temperature.

FIG. 7 shows another conventional example, in which the first chamber 27 is the first chamber 27. A PJl room 2 indoor temperature detection signal from the room temperature sensor 32 is sent to the first controller 36, and the first refrigerant valve 37 is controlled by the control signal from the first controller 3G.
Furthermore, the control signal from the first controller 36 was sent to the third controller 38 to control the compressor 2 and control the supply of refrigerant to the three first evaporators in the first chamber 27. . Also,
The second chamber 31 is a second chamber 3 by a temperature sensor 34 for the second chamber.
The temperature detection signal within 1 is sent to the second controller 40, and this second
Opening and closing the second refrigerant valve 41 according to a control signal from the controller 40,
Further, a control signal from the second controller 40 is sent to the @3 controller 38 to control the compressor 2 and control the supply of refrigerant to the second evaporator 42 in the second chamber 31.

[Problems to be Solved by the Invention] However, in the conventional examples shown in Figs. In addition, reliability is low because there are parts such as the damper 30 that are likely to break down due to freezing, and the temperature in the second chamber 31 is unstable because only the opening and closing of the gunbar 30 is controlled. Moreover, when the temperature of the first chamber 27 is below a predetermined temperature, the temperature of the second chamber 31 rises, and even if the pumper 30 is opened, the compressor 2 is not operating, so cold air is not sent, and the temperature rises abnormally. Ta.

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. Based on the timing of opening and closing of the first refrigerant valve 37 and the second refrigerant valve 41, the compressor 2 had to be turned on and off at different timings, which caused the problem that the third controller 38 became complicated. .

Moreover, in each of the above-mentioned conventional examples, freezing/refrigerating/11"
Therefore, vegetables cannot be stored in the first compartment 27, which is the freezer compartment, and in the conventional system, vegetables are stored in the second compartment 31, which is the refrigerator compartment. However, the refrigerating compartment of a general refrigerator is normally maintained at a temperature of 3°C, and if a vegetable storage section 31a is installed at the bottom of the second compartment 31, which is the refrigerating compartment, this vegetable storage section 31a
was kept at a temperature of 5 to 7°C. However, for general vegetables that do not suffer from low-temperature damage, it is better to keep them at a low temperature to suppress respiration in order to maintain their freshness for a long time.
Additionally, it is preferable to keep southern vegetables such as eggplants and cucumbers, which tend to suffer from low-temperature damage, at relatively high temperatures, but conventionally all vegetables are stored at 5-7°C, so ordinary vegetables are There is a problem in that vegetables that do not have a sufficient suppressing effect to maintain their freshness over a long period of time, and vegetables that suffer from low-temperature damage may be exposed to too low a temperature and suffer from low-temperature damage.

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 solenoids, air channels, fans, etc., and eliminate the need for extra space and prevent malfunctions. 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 having two temperature zones capable of preventing low temperature damage.

[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 loosely wound. This solves the problems of the conventional example described above.

[Effect 1] 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
By tightly winding the evaporation channel 6a constituting the evaporator 6 of the evaporator 6, and loosely winding the evaporation channel 8a constituting the evaporator 8 of the still temperature storage chamber 7, the low fA storage chamber 5 is It is now possible to keep vegetables at a predetermined low temperature that can suppress respiration, and also to set the temperature of the high temperature storage chamber 7 to a relatively high temperature suitable for storing high temperature vegetables. .

[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 is stored in this refrigerant flow path 1. 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. A low temperature temperature sensor 9 is provided in the low temperature storage chamber 5. A signal from the low temperature temperature sensor 9 is sent to a temperature sensor amplifier 10, and a signal from the temperature sensor amplifier 10 is sent to a compressor controller 11 to control the compressor. 2, thereby controlling the temperature inside the low temperature storage chamber 5 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. 11, a high-temperature sensor 13 is provided in the high-temperature storage chamber 7.
3 is sent to the temperature sensor amplifier 14, and the signal from the temperature sensor amplifier 14 is sent to the heater controller 15 to control the temperature control electric heater 12. In FIG. 1, 16 is a volume for temperature setting. The evaporation passage 8a constituting the evaporator 8 of the high-temperature storage chamber 7 is wound more roughly 1 than the evaporation passage 6a constituting the evaporator 6 of the low-temperature storage chamber 5, so it is approximately 8°C. However, in order to set the temperature of the high-temperature storage chamber 7 at 10 to 15°C, the temperature is heated by the temperature control electric heater 12, which is controlled by the temperature detected by the high-temperature sensor 13. The control electric heater 12 is controlled to a predetermined temperature (set temperature within 10 to 15°C). And above 10~15℃
The set temperature within can be set to any desired temperature by operating the temperature setting volume 16.

FIG. 2 is a schematic perspective view of a vegetable storage with two temperature zones using the control block diagram shown in FIG. A container body with an upward opening forming the chamber 5 and a container body with an upward opening constituting the high temperature storage chamber 7 are installed inside, and the container body with the upward opening and the high temperature storage chamber 7 constitute the low temperature storage chamber 5.
of? l! ! The outer periphery of a container body with a certain upper opening is covered with a heat insulating material 19.
is filled. Further, on the side of the container 18, a combination refrigerator 2, a condenser 3, and a control box 20 are arranged. In the figure, 21 is a power switch. Opening 1 of container 18
A 7 flange 22 is provided on the outer peripheral edge of the HI
The vegetable storage room is located under the floor, and the above-mentioned 7-ranno 22 is attached to an opening provided in the floor. A lid is removably attached to the upper opening of the container constituting the low-temperature storage chamber 5 and the upper opening of the container constituting the high-temperature storage chamber 7. The lid can be attached to the lid so that it can be opened and closed.

The vegetable storage having two temperature zones configured as described above stores ordinary vegetables in the low temperature storage chamber 5.
Since the low temperature storage chamber 5 is cooled to 0 to 2°C (preferably 1"C), the vegetables are cooled to the lowest temperature that will not freeze them, suppressing the respiration of the vegetables as much as possible to maintain the freshness of the vegetables and vegetables. On the other hand, vegetables and fruits that are prone to low temperature damage, such as eggplants and cucumbers, are stored in the high temperature storage chamber 7.
By setting the optimal temperature for stored vegetables within the °C range, vegetables can be stored while preventing low-temperature damage.

tj43 and FIG. 4 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. are connected in series, and 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 to the low temperature storage temperature chamber 5 side and the high temperature storage temperature chamber 7 side is unnecessary. In addition, the temperature of the high-temperature storage chamber 7 (±The compressor 2 is not turned 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 supplied to the compressor 2 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 cooled well on the high-temperature storage chamber 7 side and can self-regulate.
If the side is too low, it will be self-adjusted using the opposite principle.

In each of the above embodiments, the temperature control mis-heater 12 is also used, but the evaporator 8 in the high-temperature storage chamber 7 is
By adjusting the winding state of the evaporation channel 8a, the high temperature storage chamber 7 can be maintained without using the temperature control misheater 12.
The internal temperature can be adjusted to 10 to 15°C.

[Effect of the invention 1 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 as described above, and vegetables are cooled to a low temperature and stored in this refrigerant flow path. and the evaporator of the high-temperature storage room that cools the vegetables to a higher temperature than the above-mentioned low temperature and stores them. Since the evaporation flow path that makes up the evaporation channel is roughly wound, there are no expensive refrigerant valves for cooling μ control, pumpers using electromagnetic twist/id, air channels,
With a simple configuration without the need for a fan, the low-temperature storage chamber can be kept at 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, suppressing respiration, and maintaining freshness for a long period of time, which can reduce the risk of low temperature injury. It is possible to provide a vegetable storage having a two-temperature temperature range, which can store vegetables at a relatively high temperature and prevent low-temperature damage.

[Brief explanation of drawings]

#S1 is a control block diagram of an embodiment of the present invention, FIG. 2 is a schematic perspective view of the same as above, FIG. 3 is a control block diagram of another embodiment of the present invention, and FIG. 4 is a schematic perspective view of the same as above. , FIG. 5 is a schematic sectional view showing a conventional example, FIG. 6 is a system diagram of the same as above, and FIG. 7 is a schematic sectional view of another conventional example.
3 is a compressor, 3 is a condenser, 4 is an expansion valve, 5 is a low temperature storage chamber, 6 is an evaporator, 6a is an evaporation flow path, 7 is a high temperature storage chamber, 8 is an evaporator, and 8a is an evaporation flow path.

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 is connected to the evaporator in the high-temperature storage chamber, and 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.