JPH0914819A - Cleaning device having humidifying and drain automatic evaporating functions - Google Patents

Abstract

PURPOSE: To provide a cleaning device capable of realizing a humidifying function without installing a humidifier. CONSTITUTION: In a cleaning device in which a compressor, a four-way valve, a heat exchanger 5 out of a refrigerator, a pressure reducing device and a heat exchanger 2 placed in the refrigerator are connected in series, both drain pans 7 and 4 arranged at each of the heat exchanger 5 out of the refrigerator and the heat exchanger 2 placed in the refrigerator are connected by a drain pipe 8 and concurrently a reversible pump 9 is connected to the drain pipe 8 and both drain pans 5, 7 are provided with heating and evaporating means 14, 15.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cooling unit such as a storage cabinet, and more particularly to a cooling unit with a top-mounted humidifying and drain automatic evaporation function.

[0002]

2. Description of the Related Art A basic refrigeration cycle of a cooling unit conventionally used for storing fruits and vegetables will be described with reference to FIG.

From the discharge side of the compressor 30, an external heat exchanger 32, a capillary tube 33, and an internal heat exchanger 34 are sequentially connected via a pipe 35 via a four-way valve 31, and the internal heat exchanger 34 is connected to the internal heat exchanger 34. A refrigeration cycle is configured by being connected to the suction side of the compressor 30 via a four-way valve 31.

The inside heat exchanger 34 of this refrigeration cycle is arranged inside the storage, and the outside heat exchanger 32 is arranged outside the refrigerator. During the cooling operation, the high temperature high pressure refrigerant from the compressor 30 is heated outside the refrigerator. It is condensed in the exchanger 32, decompressed in the capillary tube 33, evaporated in the internal heat exchanger 34 to cool the inside of the storage, and the evaporated refrigerant is sucked into the compressor 30 and compressed again to be circulated. ing.

In this cooling unit, when performing humidification during the cooling operation, it is necessary to install a humidifier separately, and there is no refrigeration cycle itself having a humidifying function.

The drain water generated in the internal heat exchanger 34 is treated by piping from the internal heat exchanger drain pan to the outside of the storage to drain the drain water to the outside.

[0007]

However, drain piping work may be extremely difficult depending on the installation location of the cooling unit of the storage, and storage, aging and temperature / humidity adjustments for shipping adjustment of fruits and vegetables may be required. The use of cultivation units that require management and the use of cooling units are expanding year by year.However, conventional cooling units do not have a humidifying function, and in the case of humidification during heating, a humidifier is installed side by side to deal with it. It was

Therefore, an object of the present invention is to solve the above problems and to provide a cooling unit capable of exhibiting a humidifying function without installing a humidifier.

[0009]

In order to achieve the above object, the invention of claim 1 is to provide a compressor, a four-way valve, an outside heat exchanger,
In the cooling unit in which the decompression device and the internal heat exchanger are sequentially connected, both drain pans respectively provided in the external heat exchanger and the internal heat exchanger are connected by the drain pipe, and the reversible pump is connected to the drain pipe, Both drain pans are provided with a heating / evaporating means.

A second aspect of the present invention is the cooling unit with humidifying and drain automatic evaporation functions according to the first aspect, in which a drain water washing device is arranged in the outside pipe of the reversible pump.

According to the third aspect of the present invention, a water level sensor is provided in the drain pan in the refrigerator, and the water level sensor keeps the water level of the drain pan in the refrigerator constant during humidification during cooling or heating operation. The reversible pump is controlled so as to supply the drain water from the drain pan to the outside drain pan during the dehumidifying operation so as to supply the drain water from the drain pan.
It is a cooling unit with the humidification and drain automatic evaporation functions described.

According to a fourth aspect of the present invention, the heating and evaporating means provided in the inside and outside drain pans are evaporation pipes connected to the outside and inside heat exchangers to form a refrigeration cycle. Cooling unit with humidification and automatic drainage function.

According to a fifth aspect of the present invention, in the drain pan outside the refrigerator,
The cooling unit with humidifying and drain automatic evaporation functions according to claim 3, wherein a humidifying water supply means is installed.

According to a sixth aspect of the invention, the drain pan outside the refrigerator comprises:
6. A cooling system with a humidification and drain automatic evaporation function according to claim 5, wherein a water level sensor is provided, and the humidifying water supply means is controlled by the sensor value so that the water level of the outside drain pan maintains a predetermined water level during the humidification operation. It is a unit.

According to a seventh aspect of the invention, the reversible pump, the water level sensors of both drain pans, and the humidifying water supply means are connected to the control means, and the control means controls the operation of the reversible pump and the humidifying water supply means and the operation thereof. 7. The cooling unit with humidification and drain automatic evaporation functions according to claim 6, wherein a mode is set by a remote controller.

[0016]

According to the first, third and fourth aspects, by connecting the drain pan inside and outside the warehouse with the drain pipe and connecting the reversible pump between them, the drain water can be automatically evaporated at the time of defrosting, and the drain water can be drained. No piping work is required. In the cooling / warming operation, the reversible pump can be controlled by the water level sensor to provide a humidifying function, and the drain water can be prevented from overflowing from the internal drain pan.

According to the second aspect, clean water can be supplied to the inside of the refrigerator for humidification by passing through the washing device, which is hygienic.

According to the fifth and sixth aspects, water required for humidification can be always supplied to the internal drain pan during the humidifying operation.

According to the seventh aspect, the user can operate the reversible pump and the humidifying water supply means by the control device by setting the operation mode by the remote controller, thereby realizing the operation desired by the user.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below in detail with reference to the accompanying drawings.

In FIG. 1, reference numeral 1 denotes a storage box such as a cooling box. An internal heat exchanger 2 is arranged on the ceiling of the storage box 1, and an internal fan 3 is installed in the internal heat exchanger 2. At the same time, an internal drain pan 4 is installed below the internal heat exchanger 2.

An external heat exchanger 5 is installed outside the storage 1, an external fan 6 is installed in the external heat exchanger 5, and an external drain pan 7 is installed below the external heat exchanger 5. Is installed.

These drain pans 4 and 7 are connected to the drain pipe 8
The reversible pump 9 is connected to the drain pipe 8. Further, a drain water cleaner 10 is connected to the outside pipe 8 of the reversible pump 9. A planar heater 11 is attached to the internal drain pan 4 and the internal drain pipe 8, and evaporation pipes 12 and 13 incorporated in a refrigeration cycle described later are installed in the internal and external drain pans 4 and 7, respectively. Thus, the heating and evaporating means 14 and 15 inside and outside the refrigerator are formed.

Water level sensors 16 and 17 for detecting the water levels in the drain pans 4 and 7 are provided inside and outside the drain pans 4 and 7, respectively.
Is installed, and the detection values of the sensors 16 and 17 are input to the control device 20.

The outside drain pan 7 is provided with a humidifying water supply means 21 for supplying water during the humidifying operation. The humidifying water supply means 21 comprises a humidifying water supply pipe 22 and a water level ensuring water valve 23 connected to the water pipe 22.

The control device 20 receives the detection values of the sensors 16 and 17, receives the reversible pump 9, the water valve 23 for securing the water level,
The freezing prevention sheet heater 11 and a freezing cycle described later are controlled. The controller 20 is connected to a wired or wireless remote controller 24, and controls these devices based on the operation mode transmitted from the remote controller 24.

Next, the refrigerating cycle will be described with reference to FIG.

In FIG. 2, the refrigeration cycle is basically a four-way valve 26 from the discharge side of the compressor 25, an outside heat exchanger 5, a pressure reducing device 27 such as a capillary tube, an inside heat exchanger 2, and a four-way valve. 26 are connected in sequence, but in this cycle, during cooling, the compressor 25 to the four-way valve 26 are connected.
The outside evaporation pipe 13 is connected to the pipe leading to the outside heat exchanger 5 via the discharge side of
Is installed in the outside drain pan 7, and when heating, the inside evaporation pipe 12 is connected to the pipe from the compressor 25 to the inside heat exchanger 2 via the four-way valve 26, and the inside evaporation pipe 12 is A refrigeration cycle is configured by being installed in the internal drain pan 4.

First, the flow of the refrigerant during the cooling operation will be described with reference to FIG.

The high-temperature high-pressure refrigerant from the compressor 25 flows through the four-way valve 26, the outside-external evaporation pipe 13 and the outside-compartment heat exchanger 5 to be condensed and condensed as shown by the solid line arrow in the figure. It is decompressed by 27 and flows into the internal heat exchanger 2, where it evaporates and cools the inside of the storage 1 and returns to the compressor 25 via the external evaporation pipe 13 and the four-way valve 26.

Next, when the internal heat exchanger 2 is frosted to perform defrosting operation or warming operation, the four-way valve 26 is switched, and the high-temperature high-pressure refrigerant from the compressor 25 is indicated by the dotted line in the figure. As shown by the arrow, it flows into the internal heat exchanger 2 through the four-way valve 26 and the external evaporation pipe 13, is condensed in the internal heat exchanger 2, and defrosts the frost formed on the internal heat exchanger 2. Or after heating the inside air, it is decompressed by the decompression device 27, evaporated by the outside heat exchanger 5 (acting as an evaporator), and passed through the outside evaporation pipe 13 and the four-way valve 26. Then, the flow returns to the compressor 25.

Next, the operation of the embodiment will be described.

The control of the control device in each operation mode will be described.

A. Humidification / warming operation During the warming operation in the refrigerator, the outside heat exchanger 5 outside the refrigerator serves as an evaporator, which causes frost formation on the outside heat exchanger 5, and the defrosting operation causes the outside drain pan 7 Drain water collects in. This drain water is sent to the internal drain pan 4 via the drain pipe 8 by the reversible pump 9.

The internal drain pan 4 detects the water level required for humidification by the water level sensor 16, and the controller 20 controls the reversible pump 9 based on the water level sensor 16 so that the water level is always kept constant.

In this state, the heating / evaporating means 14 including the planar heater 11 or the evaporation pipe 12 evaporates the drain water in the drain pan to perform the humidifying operation. During this humidifying operation, when the drain water in the outside drain pan 13 is small, the water level sensor 17 detects this and opens the water level securing water valve 23 of the humidifying water supply means 21 to supply tap water. Control to maintain a constant water level.

By controlling in this way, the humidity in the storage 1 can be secured at an appropriate value during both the cooling and heating operations.

B. Humidification cooling operation During the cooling operation, the defrosting operation of the internal heat exchanger 2 causes drain water to collect in the internal drain pan 4. The control device 20 operates the planar heater 11 so that the drain water accumulated in the internal drain pan 4 does not freeze, so that the drain water is partially evaporated so that the inside of the internal refrigerator has an appropriate humidity.

When the drain water is accumulated in the internal drain pan 4 more than necessary, the water level sensor 16 detects it and controls the reversible pump 9 to transfer the internal drain water to the external drain pan 7. Therefore, the drain water is automatically evaporated by the evaporation pipe 13 which is the heating evaporation means 15.

By thus evaporating the drain water, the drain piping work for drain drainage becomes unnecessary.

C. Dehumidifying / cooling operation During dehumidifying / cooling operation, drain water is accumulated in the internal drain pan 4. The accumulated drain water is detected by the water level sensor 16, the reversible pump 9 is operated until the drain pan 4 runs out of water, and the drain water is sent to the outside drain pan 7, which is then evaporated.
By automatically evaporating with the drain pan 4 more than necessary
Drain water does not collect in the tank and overflow can be prevented.

A cleaning device 10 is provided outside the reversible pump 9.
By arranging, when the drain water mixed with dust or dust is sent to the internal drain pan 4, clean water can be sent. This allows clean humidification even when food or the like is stored in the storage 1.

Furthermore, since the tap water or the like can be supplied to the outside drain pan 7 by the humidifying water supply means 21, during the heating / cooling operation, the drain pan 4 cannot secure enough water for the inside drain pan 4. When the water level of No. 4 is lowered, the water level sensor 16 detects the phenomenon to supply tap water, so that stable water can be always sent to the in-compartment drain pan 4.

[0044]

In summary, according to the present invention, the drain pan inside and outside the warehouse is connected by the drain pipe, the reversible pump is connected to the drain pipe, and the heating and evaporating means is provided in both the winning drain pans. No drain pipe is required, and evaporation for drain drainage and evaporation for humidification inside the chamber can be performed.

[Brief description of the drawings]

FIG. 1 is an overall schematic diagram showing one embodiment of the present invention.

FIG. 2 is a diagram showing a refrigeration cycle of the present invention.

FIG. 3 is a diagram showing a conventional refrigeration cycle.

[Explanation of symbols]

 2 Internal heat exchanger 5 External heat exchanger 4,7 Drain pan 8 Drain piping 14,15 Heating / evaporating means 25 Compressor 26 Four-way valve 27 Pressure reducing device

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kimio Fushimi 336 Tadahara, Fuji City, Shizuoka Prefecture, Toshiba Corporation Fuji Factory (72) Inventor Hajime Sano 336 Tatehara, Fuji City, Shizuoka Prefecture Toshiba Fuji Factory, Ltd.

Claims (7)

[Claims] 1. A cooling unit in which a compressor, a four-way valve, an outside heat exchanger, a pressure reducing device, and an inside heat exchanger are sequentially connected, and both drain pans provided in the outside heat exchanger and the inside heat exchanger, respectively. Is connected with a drain pipe, a reversible pump is connected to the drain pipe, and heating evaporation means is provided on both drain pans. A cooling unit with a humidification and drain automatic evaporation function. 2. The cooling unit with humidification and drain automatic evaporation functions according to claim 1, wherein a drain water washer is disposed in the piping outside the reversible pump. 3. A water level sensor is provided in the drain pan inside the refrigerator, and the water level sensor is used to keep the water level of the drain pan inside the refrigerator constant during humidification during cooling or heating operation. Is supplied during dehumidification operation,
The cooling unit with humidification and drain automatic evaporation functions according to claim 1, wherein the reversible pump is controlled to supply the drain water in the internal drain pan to the external drain pan. 4. The humidification and drain automatic system according to claim 1, wherein the heating and evaporation means provided in the inside and outside drain pans are evaporation pipes which are connected to the outside and inside heat exchangers to form a refrigeration cycle, respectively. Cooling unit with evaporation function. 5. The cooling unit with a humidifying and drain automatic evaporation function according to claim 3, wherein a humidifying water supply means is installed in the outside drain pan. 6. The outside drain pan is provided with a water level sensor, and the humidifying water supply means is controlled by the sensor value so that the outside drain pan has a predetermined water level during the humidifying operation. Cooling unit with humidification and drain automatic evaporation functions described in 5. 7. The reversible pump, the water level sensors of both drain pans, and the humidifying water supply means are connected to a control means, and the control means controls the operation of the reversible pump and the humidifying water supply means, and its operation mode is set by a remote controller. The cooling unit with humidification and drain automatic evaporation functions according to claim 6.