JP2001133097A - Cooling storage box - Google Patents

Abstract

PROBLEM TO BE SOLVED: To rapidly freeze a cooling storage agent. SOLUTION: A heat insulated box body 4 storing therein a cooling storage agent 2, an evaporator 9 of a cooling device to cool the agent 2 in the body 4, a cooling storage agent temperature sensor, i.e., a thermostat TH2 for cooling storage agent, are provided. A defrosting heater DH, as a heating device for defrosting, is provided in the evaporator 9, and if the temperature of the thermostat TH2 for the cooling storage agent is equal to or higher than a predetermined temperature, a heating operation of the heater DH is inhibited.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cooling storage for freezing a regenerator.

[0002]

2. Description of the Related Art Conventionally, this kind of cooling storage is disclosed in
The cooling storage disclosed in Japanese Patent Publication No. 0-220960 (F25D25 / 00) includes a storage room that is cooled, a basket that is stored in the storage room and stores articles, and a hook that hangs down from the lower surface of the basket. Section. The cold storage agent hanger hooked on the hook portion is provided with a slit portion having a gap, the upper portion of the cold storage agent is placed in the slit portion,
On the other hand, the mat-type cold storage agent connecting portion is inserted into the gap of the mat-type cold storage agent slit, and the lower portion of the mat type is suspended.

[0003]

Generally, a defrost heater is provided in an evaporator of a cooling storage, and defrosting of the evaporator is performed by a defrost heater every predetermined time (for example, every 5 to 6 hours). Was. For this reason,
If defrosting starts during the freezing operation of the regenerator, there is a problem that the time until the freezing is extended. The present invention has been made in view of the above problems, and provides a cooling storage for quickly freezing a regenerator.

[0004]

In order to achieve the above object, according to the first aspect of the present invention, there is provided an insulated box housing a regenerator therein, and a cooling device for cooling the regenerator in the insulated box. Device, comprising a regenerator temperature detecting device for detecting the temperature of the regenerator, wherein the cooling device is provided with a heating device for defrosting, and when the regenerator temperature detection device is at or above a predetermined temperature And a cooling storage for inhibiting heating of the heating device.

As described above, when the temperature detected by the regenerator temperature detecting device is equal to or higher than the predetermined temperature, heating by the heating device is prohibited and the cooling operation is continued. Further, according to the invention of claim 2, a heat insulating box housing a cold storage agent therein, a cooling device for cooling the heat insulating box, a cold storage agent freezing timer for measuring a predetermined time until the cold storage agent is frozen, and The cooling device is provided with a heating device for defrosting, and provides a cooling storage that inhibits heating of the heating device during the measurement of the cool storage agent freezing timer.

As described above, when the count of the cool storage agent freezing timer is started, heating by the heating device is prohibited and the cooling operation is continued.

[0007]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a longitudinal sectional view of a cooling storage provided with the present invention, FIG. 2 is an electric circuit diagram showing an embodiment using a regenerator temperature detecting device, and FIG. 3 is an embodiment using a regenerator freezing timer. FIG.

In FIG. 1, reference numeral 1 denotes a cooling storage, which can be frozen, such as a regenerator 2, and a heat-insulating box 4 having a front opening that defines a storage room 3 with heat-insulating material. A heat-insulating door 5 for opening and closing the front opening, a machine room 6 formed at the top outside the heat-insulating box 4, and a height-adjustable pedestal 7 attached to four lower corners of the heat-insulating box 4 Consists of

In the heat-insulating box 4, a plurality of shelves 8 are provided in the vertical direction, and in this embodiment, four shelves 8 are provided. Further, a cooling unit 11 provided with an evaporator 9 as a cooling device and a cooling fan 10 is provided at the top of the heat insulating box 4 to cool the cold storage agent 2 placed and stored on the shelf 8.

The evaporator 9 is provided with a defrost heater DH as a heating device in a thermally conductive manner, and a defrost recovery thermo DTH. The defrosting thermostat DTH may be provided near the evaporator 9 to detect the ambient temperature around the evaporator 9. Further, a water receiving tray 12 for receiving defrost water generated by heating of the defrost heater DH is provided below the cooling unit 11, that is, below the evaporator 9, and a heat insulating box is provided at a rear portion of the water receiving tray 12. A drain pipe 13 arranged on the back of the body 4 is connected.

A machine room panel 14 is provided at the front of the machine room 6 so as to be openable and closable.
A compressor 15 and a condenser 16 constituting a refrigeration cycle together with the evaporator 9 and a condensing fan 17 for cooling the compressor 15 and the condenser 16 are provided.

With the above configuration, an electric circuit of the present invention will be described with reference to FIG.

The defrost heater DH is connected in series to the overheat protector OHP, the defrost recovery thermo DTH, and the defrost timer DT. The defrost heater DH has an overheat protector OHP connected in parallel with the first auxiliary relay X1. Further, the defrost recovery thermo DT
A second auxiliary relay switch X2S is provided between H and the defrost timer DT.

Next, the internal temperature thermostat TH1 for measuring the internal temperature and the power relay PR are connected in series.
The in-chamber temperature thermostat TH1 and the power relay PR and the cooling fan motor FM1 of the cooling fan 10 are connected in parallel.

These are the first auxiliary relays X1
The first auxiliary relay switch X1S is connected in series with the first auxiliary relay switch X1S. The first auxiliary relay switch X1S is connected between the defrost timer DT and the second auxiliary relay switch X2S. PR and the cooling circuit of the cooling fan motor FM1. The compressor motor CM of the compressor 15 and the condensing fan motor FM2 of the condensing fan 17 are connected to a power relay switch PRS, and are operated synchronously.

Further, a freezing start switch SW of the regenerator 2
Is connected in series with the regenerator temperature detecting device, that is, the regenerator thermostat TH2 and the second auxiliary relay X2. The temperature characteristics of the cold storage agent thermostat TH2 are set to be lower than those of the in-chamber temperature thermostat TH1. The second auxiliary relay switch X2S of the second auxiliary relay X2 is connected in parallel with the freeze start switch SW, and operates in conjunction with the second auxiliary relay switch X2S of the above-described defrost circuit.

The operation of the present embodiment having the above configuration will be described.

First, the normal cooling operation will be described.
When the internal temperature is higher than the set value of the internal temperature thermostat TH1, the internal temperature thermostat TH1 is turned on, the power relay PR is energized, and the cooling fan motor FM1 is driven to start the operation of the cooling fan 10. You. When the power relay PR is energized, the power relay switch PRS is turned on, so that the compressor motor CM and the condensing fan motor FM2 start operating. As described above, the cooling of the storage room 3 is performed, and the cooling operation of the stored items stored in the storage room 3 is started.

When the temperature in the refrigerator becomes lower than the set value,
The internal temperature thermostat TH1 is turned off, the power supply to the power relay PR is stopped, and the compressor motor CM and the condensing fan motor FM2 are stopped. The cooling fan motor FM1 operates continuously until a defrosting operation described later.

When the internal temperature rises, the internal temperature thermostat TH1 is turned on and the above-described operation is repeated.

Next, the defrosting operation will be described. The defrost timer DT is turned on at regular intervals (for example, every 5 to 6 hours). At this time, if the internal temperature is low and the defrost recovery thermostat DTH is ON, the first auxiliary relay X1
Is turned on, and the first auxiliary relay switch X1S switches to form a self-holding circuit. And OHP
Is supplied to the defrost heater DH through the heater to melt the frost of the evaporator 9. Here, the defrost timer DT
Is turned off, the self-holding circuit is formed by the first auxiliary relay switch X1S, so that the defrosting operation is continued.

When the temperature of the evaporator 9 rises due to melting of the frost, the defrost recovery thermostat DTH is turned off, the self-holding circuit is cut off, and the cooling operation is started again.

Next, a freezing operation for freezing the regenerator 2 will be described. When the cool storage agent 2 is stored in the storage room 3 and the freeze start switch SW is pressed, the second auxiliary relay X2 turns on the second auxiliary relay switch X2S to form a self-holding circuit.

At the same time, the second auxiliary relay switch X2S of the defrosting circuit is turned off, and the defrosting operation cannot be started while the self-holding circuit is formed. Since the temperature characteristics of the thermostat TH2 for the regenerator are set to be lower than the temperature characteristics of the in-chamber thermostat TH1 as described above, the thermostat TH2 does not turn off while the regenerator 2 is stored and the freezing operation is performed.

When the regenerator 2 freezes, the thermostat TH2 for the regenerator turns off and the second auxiliary relay X2
To the second relay switch X2S is turned off.
F and the second auxiliary relay switch X2 of the defrost circuit
S is turned ON, and the defrosting operation is enabled.

As described above, when the freeze start switch SW is pressed to shift to the freezing operation, energization of the defrost heater DH is prohibited, and the shift to the defrosting operation cannot be performed. Therefore,
The regenerator 2 can be quickly frozen.

Next, another embodiment of the present invention will be described with reference to FIG.

The basic configuration is the same as that of FIG.

A timer T and a timer switch TS are provided instead of the regenerator thermostat TH2, the second auxiliary relay X2, and the second relay switch X2S.

The timer T is provided with a freeze start switch SW, and a timer switch TS which is turned on and off by the timer T is provided between the defrost timer DT and the defrosting recovery thermo DTH.

The freezing operation will be described with the above configuration.

When the cold storage agent 2 is stored in the storage room 3 and the freeze start switch SW is pressed, the timer T starts counting, and the timer switch TS is turned off, so that it is impossible to shift to the defrosting operation. When the timer T counts for a predetermined time, the timer switch TS is turned on, and the defrosting operation is enabled.

As described above, when the freeze start switch SW is pressed to shift to the freezing operation, the energization of the defrost heater DH is prohibited by the timer T, and the shift to the defrosting operation cannot be performed. Therefore, the regenerator 2 can be quickly frozen.

[0035]

As described in detail above, according to the first aspect of the present invention, when the temperature detected by the regenerator temperature detecting device is equal to or higher than the predetermined temperature, heating by the heating device is prohibited and the cooling operation is continued. According to the second aspect of the invention, when the count of the cool storage agent freezing timer is started, the heating by the heating device is prohibited and the cooling operation is continued.

Since the transition to the defrosting operation by the heating device is prohibited by the regenerator temperature detecting device or the regenerator freezing timer, the regenerator can be quickly frozen.

[Brief description of the drawings]

FIG. 1 is a vertical sectional view of a cooling storage provided with the present invention.

FIG. 2 is an electric circuit diagram showing an embodiment using a regenerator temperature detecting device.

FIG. 3 is an electric circuit diagram showing an embodiment using a cool storage agent freezing timer.

[Explanation of symbols]

 TH2 Thermostat for regenerator DH Defrost heater DT Defrost timer 1 Cooling storage 2 Regenerator 4 Insulating box 9 Evaporator 15 Compressor 16 Condenser

Claims (2)

[Claims] A cooling device for cooling the cooling agent in the heat insulating box, a cooling device temperature detecting device for detecting a temperature of the cooling agent, the cooling device comprising: The device is provided with a heating device for defrosting,
When the temperature of the cool storage agent temperature detection device is equal to or higher than a predetermined temperature, heating of the heating device is prohibited. 2. A heat storage box body for storing a cold storage agent therein, a cooling device for cooling the heat insulation box body, and a cold storage agent freezing timer for measuring a predetermined time until the cold storage agent freezes, The cooling device is provided with a heating device for defrosting,
A cooling storage, wherein heating of the heating device is prohibited during the measurement of the cool storage agent freezing timer.